Appendix A IDU Default parameter...................................................................................... 137
Appendix B Antenna accessories ........................................................................................... 138
Appendix C Pole accessory..................................................................................................... 139
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Preface
By reading this document, user can understand the features of the DMW-P system ， installation ,commissioning and troubleshooting guidelines for the equipment. If you want to know the features and maintenance principle for this product in detail please read each chapter carefully. If you want to be familiar with this product in a shorter time， please refer to Chapter 5 and 6. If you want to be familiar with troubleshooting please refer to chapter 9. If you want to monitor the microwave network by EMS system please refer to chapter 8. You can also get detailed information from User Manual for EMS.
Targeted Audience This document is useful for: Installation engineers Maintenance engineers Sales and/or marketing engineers Commissioning engineers
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Revision
2009-08-25 1st edition
1 System Overview
1.1 Summary DMW-P digital microwave communication system (hereinafter referred to as DMW-P system) is developed by our own R & D, in full compliance with the relevant recommendations of ITU-T, national standards, as well as the latest generation of industry-standards for digital microwave communication system products. The transmission capacity of the equipment is 4 × E1, which is widely used in the mobile communications field. Usually, a DMW-P system terminal consists of an indoor unit (IDU), an outdoor unit (ODU), an antenna and an IF cable for connecting IDU and ODU. DMW-P systems in a network can be managed through a network element management system (EMS). By running the server program, all the network units of the microwave system can be conveniently installed, monitored and maintained within its operations limits. There are two sub-series system of DMW-P system called 2101 system with LCD option (refer to chapter 7 for LCD) and DMW-P system without LCD option.
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1.2 System Structure
The DMW-P digital microwave communication system terminal is composed of the IDU, the ODU, the antenna and the connecting cable between IDU and ODU.
Figure1-1 IDU
1.3 System principle
The DMW-P digital microwave communication system is composed of the IDU, the ODU, the antenna and the connecting cable between IDU and ODU.
The ODU is connected to the IDU through the IF cable. The power supply power, bidirectional IF signal, the control signal and the monitor signal are carried by the cable.
The DMW-P system can operate in the 7GHz ~23GHz microwave band with IDU shared between these frequencies. The operating frequency depends on the modules within the ODU, the different working frequency bands duplex filters, antennas and couplers. Network management software is suitable for all-band digital microwave equipment. The 10/100BASE-T EMS interface and auxiliary service channel are built into the IDU. After being processed, the main service data, and auxiliary data are sent to the QPSK modulator, the control and monitor signal are sent to the OOK modulator, the modulated signals and the power supply voltage are then multiplexed onto the IF cable for transmission to the ODU. After separating out the DC voltage, the transmitting module of ODU converts the IF signal to the microwave signal for transmitting through the antenna. After being received by the antenna ,the microwave signal will go through signal filtering, amplification, frequency down conversion and AGC processing; then the IF signal will be sent to the IDU for de-multiplexing and processing.
The main service data and auxiliary data will be separated in the QPSK demodulator of the IDU.
1.4 Features
The features of IDU are as described below： Universal product design: all ODU products in the frequency range from of 15GHz are based on the
same design architecture sharing same or similar IDUs Flexible interfaces: provided for multi-services connection The transmission bandwidth and capacity can be adjusted by software Use concatenation code technology (non-systematic convolution code, interleaving, RS code)and
Forward Error Correction Technology It can be configured as unprotected (1 +0) mode or hot standby (1 +1) mode with hitless switching Installation is convenient; it only needs a cable to connect the indoor and the outdoor units. The
maximum distance is 300m with RG8/U cable Powerful monitoring capabilities, a comprehensive status display and loop test functions The SNMP system is simple but effective and is suitable for a variety of network topologies. The number
of NEs being managed can be up to 255. Compact design, small size, suitable for various environment including harsh environment
The feature of ODU are as described below： Comply with the ITU-T, ITU-R and relevant GB standards
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Operating frequency: 15G Standard operating input voltage of ±48V (within the 36-72 V range).Wide operating input voltage range:
± (20~72) V is also available. The transmitter power, frequency, receiver bandwidth of ODU can be configured through the IDU The IDU and ODU is connected through an IF cable, with a maximum cable length of 300 meters Advanced thin-film and soft-board technology are used High receive sensitivity, high system gain High frequency stability, wide frequency tracking range Low power consumption, small size.ODU can be integrated with the antenna for convenient installation The RSSI level can be monitored through the corresponding voltage on the BNC interface. Good earthquake resistance
1.5 Configuration Mode
DMW-P system can be configured into different system modes, such as, 1+0 unprotected system, and 1+1 hot standby protected system. The basic equipments of each hop for different modes as follows:
Type Name 1+0 Mode 1+1 Mode Remark Main equipment IDU 2 4 Main equipment ODU 2 4
Auxiliary equipment IF CABLE 2 4 Optional purchases
Auxiliary equipment Antenna 2 2 Optional
purchases Auxiliary equipment Coupler 2
Accessory Grounding cable,
connector and etc
Optional purchases
Figure 1-1 DMW-P system 1 +0 Unprotected mode configuration： 1 +0 mode consists of(one terminal): •one ODU（ODU） •one IDU（IDU） •one set antenna •one IF cable for connection IDU and ODU
DMW-P system supports 1+1 protected mode. When the main link’s receiving signal gets worse or hardware
goes wrong, system can automatically switch over to the standby link, to ensure the continuity of transmission.
1+1 Protected hot standby mode, for one terminal:
Two ODUs
One set of antenna
One (ODU-ODU) Combiner
Two IDUs
Two IF cables, each connecting the ODU and IDU respectively
One IDU-IDU data protection Y cable
One data switching boxOne net wire for communications between host and standby IDUs
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Figure1-3 HSB Typical example——Relay mode
DMW-P system can be used as a relay station. At the same time, it can also be used to add/drop E1 transmission capacity. The typical application is as follows:
Figure1-4 Relay communication system
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1.6 DMW-P System Technical Parameters
type PDH DMW-P Band （GHz） 15
Frequency Range (GHz) 14.5~15.35
TR Spacing（MHz） 420/490 Standard ITU-R/ETSI/FCC
Channel Separation （MHz） 7
Channel Setting Software setting(EMS remote or local) Frequency Stability
(ppm) ±5
Transmitter Power +5~+25dBm Noise Figure（dB） ≤7
7MHz ≤-87dBm
14MHz ≤-84dBm
Receive Sensitivity Level@BE
R10-6 28MHz ≤-81dBm Residual BER ≤1×10-13 Transmission
Capability 4E1/8E1/16E1/32E1 and 10/100BaseT
Modulation Mode QPSK/16QAM ECM concatenation code
System configuration 1+0 ，1+1 Protect function 1+1 Hot Standby Protection, switching time<50ms
Antenna interface WR-62
IF interface
IDU to ODU：310MHz, -7 to -2 dBm ODU to IDU： 70MHz, -37 to 0 dBm 50Ω coaxial N connector, Female，MAX：300m
RSSI: Output voltage vs. RSL : +1(min)～+5V(max) Monitor：OOK DC:-36V～-72V
Power Consummation 1+0: <30W 1+1: <50W Antenna 0.3/0.6/0.0.9/1.2/….4m
EMC ITU-R F.746-3，YD1138-2001
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Environment IDU: -10 to 50 ODU: -33 to 50
Figure 1-2 DMW-P system specifications
2 IDU
2.1 Overview
The IDU is a standard 1U high 19-inch chassis and complies with the EIA and ETSI telecom standards. The main functions are as follows:
MUX and DEMUX user service data and management information. Supply power to ODU and transmit information through the IF cable. Provide the management interface. Provide the external alarm interface.
Figure2-1 IDU DMW-P IDU specification Modulation QPSK Line interface standard comply with ITU-T Rec. G.703, G.823 Code HDB3 Impedance 75 Ω balance unbalance or 120Ωbalance IF interface transmit 310MHz Receive 70MHz IF cable connection N-type Protection connection optional RJ45 Auxiliary data auxiliary data channel 2 Interface 1 RS232 line rate1 RS232，19200bps full-duplex asynchronous Interface 2 EOW channel I/O alarm Exterior alarm output 4 channels, TTL, drive current>10mA connection 9 pin D-SUB NMS LAN interface type 10BaseT Ethernet connection RJ45 LED indicator light5 LEDs (POW，IDU，ODU;LINK;;AIS;) Electrical performance input +/- (36 to 72) VDC, or +/- (20 to 72) VDC connection 2 pin with flange power consumption <10W
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protection fuse 4A fuse Mechanism chassis standard 19’ 1U rack dimensions 482(W) ×220(D) ×44 (H) weight <44kg CAPABILITY selected capability 4xE1 connector DB44/female accessories E1 connection DB to twisted-pair connection PROTECTION Protection type 1+1 hot standby Switching time < 50ms
2.2 Front Panel
IDU front panel Before mounting and cabling the IDU, you must know some basic info of the front panel of IDU equipment, see figure below.
Figure2-2 IDU front panel
No. Features Descriptions
1 Ground Connector
Connector for equipment grounding
2 ODU / IF IF interface, N-Type connector to be connected IDU to ODU with IF coaxial-cable.
3 E1 TRIB 1-4
Traffic E1 interfaces: E1 TRIB 1-4: DB44 connector for E1 ports from 1 to 4. The E1 signal cable would connect to these connectors. NOTE: The E1 signal cable is labeled with index number and signal direction. Such as “O2”: Output signal of E1 port 2; “O” means “output” and “2” is the index number of E1 port; “I2”: Input signal of E1 port 2; “I” means “input”.
5 LEDs have two states: brighten and darken. PWR：Green light to indicate power on IDU：Red light to indicate IDU error, no light means normal ODU：Red light to indicate ODU error, no light means normal AIS：Red light to indicate ，error no light means normal. LNK：Green light to indicate system traffic link is connected well, no light means the link is interrupted and failed to connect to remote station.
11 ESC Button to go backward or exit
12 UP Button to go upward or plus 1 to number
13 DOWN Button to go downward or minus 1 from number
14 ENTER Button to issue command or go into the sub menu.
15 LCD LCD Screen
16 FUSE Fuse to protect the supply power input.
17 EOW Port connected to a general telephone set
18 Power Socket Socket for connection of supply power. The ground end of supply power MUST be connected to the “RTN” end of the socket.
19 PWR Power switch
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2.3 IDU principle
Figure 2-3 IDU principle
Black real line: service data stream Red dashed: CPU configuration monitor and control signal The transmission capability of IDU is 4E1. The IDU consists of the service interface circuit, the auxiliary service circuit, the modulation module, Demodulation module, power supply, CPU and microwave frame MUX and DEMUX module. The main service data coming from the E1 interface circuit will be mixed with the EOW signal, auxiliary
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signal, CPU EMS signal etc, and then they will be sent to the microwave frame MUX module. After Muxing the microwave frame signal, the QPSK modulation module will generate a 310MHz signal, which will be sent to ODU through the diplexer. The 70MHz IF signal coming from ODU will be sent to the demodulation module also through the diplexer. The microwave frame will be separated into the EOW signal, auxiliary data signal, CPU EMS signal and the main service data.
2.4 IF cable
Frequency arrangement for the IF Cable：
70 31010.7 MHz
Rx IF Tx IF
Power
OOK Modem
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Figure 2-4 Frequency arrangement for the IF Cable
Attenuation Characteristic for the IF Cable：
ATT Characteristic for the IF Cable
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0 50 100 150 200 250 300 350 400 450 500
Freguency（MHz）
ATT（
dB/1
00m）
SYWV-50-5
SYWV-50--7
SYWV-50-9
Note: The data shown above typical value. ATT: Attenuation.
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Attenuation range of DMW-P: 310MHz, IDU to ODU: over 30 dB 70MHz, ODU to IDU: over 30 dB
Notice for cable selection：SYWV-50-5-1(100m---200m) SYWV-50-7-1(200m---300m)
If the IF cable is not connected to the ODU but to a test equipment, an DC block should be added to the connector. Otherwise, the equipment would be severely damaged.
3 ODU (Out-door Unit)
3.1 Overview
Figure 3-1 ODU
ODU technical specification
parameter specification Freq(GHz) 15 Freq range (GHz) 14.5~15.35
TR spacing (MHz) 420/490
Bandwidth (MHz) 7
Freq stability (ppm) ±5
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TX power (dBm) 0 to +20
Power accuracy (dB) ±2.0
Spurious Rejection (dBc)
-60
Power Range at antenna receive end(dBm)
-90~-20@ 7MHz BW
No Damage Level (dBm) 0
Noise Figure (dB) ≤6.0
IF IF Freq (MHz) 70 Output Level (dBm) 0±2 RF Rx Freq (MHz) 310 Output Level (dBm) -37~-8 Spurious Rejection of out-of band (dBm) ≤-50
Spurious Rejection in-band (dBc) ≤-60
Interface Antenna interface WR-62
IF cable interface N-Type, Single cable Voltage (V) +/- (36 to 72) VDC communication/control Alarm Tx power failure alarm, LO un-lock alarm RSSI interface BNC-K, +0V(min.pwr)~+5V(max.pwr) control RF Frequency setting, TxRF power level setting alarm/control protocol defined
DMW-P Outdoor unit is enclosed unit with off-white color and has .
the following exterior character,
•interface used for connecting to antenna（standard UBR flange）
•interface used for connecting to IDU（ N type connector）
• test port for receive power used in antenna alignment（ground capped BNC connector）
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Figure 3-3 ODU waveguide interface
Wave guide type and measure according to ODU frequency change DMW-P 5.8G ODUs use N type connector,DMW-P7/8G ODUs use UBR 84 flange， 13/15GHz ODUs use UBR140 flange and 23G ODU use UBR220 flange. RSSI/Voltage
Figure3-3 RSSI vs. Voltage
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3.3 Frequency Plan
RF configuration plan in the common used Frequency： 15GHz ：TX/RX Spacing = 420MHz Bandwidth = 14MHz Tx Low ChN = 14508.00 + （ N 一 1 ） × 14MHz Tx high ChN = 14508.00 + （ N 一 1 ） ×14MHz+420MHz Bandwidth = 28MHz Tx Low ChN = 14515.00 + （ N 一 1 ） × 28MHz Tx high ChN = 14515.00 + （ N 一 1 ） × 28MHz+420MHz 18GHz ：TX/RX Spacing = 1092.5MHz Bandwidth = 27.5MHz Tx Low ChN = 17727.50 + （ N 一 1 ） ×27.5MHz Tx high ChN = 17727.50+ （ N 一 1 ） ×27.5MHz +1092.5MHz
DMW-P ODU
Frequency Frequency range GHz
T-R Spacing supported, MHz
Maximum Tuning Range (dependent upon T-R spacing),MHz
15 GHz 14.4 to 15.35 315/420/490/644/728 245 RF channel configuration plan for 5.8G
Channel Spacing (65MHz）
Low Tx/High Rx(H) (MHz) High Tx/Low Rx (L) (MHz)
Channel No. Tx frequency Rx frequency Channel No. Tx frequency Rx frequency
15GHZFrequency Range 14500 to 15350MHZNumber of channels 15 pairsSeparation of channels 28 MHZT-R Spacing 420 MHZCapacity 2.048;2x2.048;8.448 Mbits/s
3.4 ODU principle
Figure 3-4 ODU principle diagram
ODU works in a full-duplex transceiver mode.
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When the signal is transmitted, the OOK signal from IDU will be separated by a low pass filter and sent to
the OOK circuit for communications between IDU and ODU.
After amplified by AGC circuit, up converted by mixers, filtered by filters and isolated by an isolator, the
310MHz signal multiplexed onto the microwave carrier. The carrier is then transmitted to the remote station
through the antenna.
When the signal is received, the microwave signal will be filtered, amplified, down de-multiplexed
converted to 70 MHz IF signal. The signal will be demodulated and unframed, and then the main service data
and the auxiliary service data will be separated.
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4 Antenna
4.1 Overview
The three most important antenna considerations are size, polarization, and location.
4.2 Size
The gain of the antenna is proportional to the area of the antenna. Antenna gain is a measure of how well an antenna focuses a signal for transmission or reception as compared with a point isotropic source. The larger is the antenna, the narrower is its beam width and the higher the resulting gain. Narrower beam widths increase the gain reduces the multi-path, lowers the unwanted interference and enhance the received signal required to link up. However, the trade off is that it is harder to align and heavier. When placing an antenna in an urban environment, a slightly larger antenna may be needed than in a rural environment even if the distance between antennas is the same, due to more interference and multi-path issues.
4.3 Link calculation
Microwave propagation loss in free space(Non-stop, barrier-free) is： Ls（dB）=92.4+20lgF+20lgD namely： F：transmit power, unit is GHz D：transmit distance, unit is KM（km） For example, 15GHz frequency signal is transmitted to 20km,the loss is ： Ls=92.4+23.5+26=141.9dB System gain equipment system gain is ： Gs=Pt-Pro namely： Pt is equipment RF output power Pro is system receive sensitivity For example, Pt=19dBm，Pro=-87dBm so ,the equipment system gain is ： Gs=106dB Link total gain Gl=Gs+Gt+Gr namely： Gt is transmit antenna gain(dB) Gr is receive antenna gain(dB），generally, the size of transmit and receive antennas are the same. In such situation, Gt=Gr For example, transmit and receive port are both 0.6m antenna, the gain is Gt=Gr=36.8dB for high performance antennas，so the link gain is， Gl=106+36.8+36.8=179.6dB
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link total loss Lt=Ls + Lft + Lfr namely： Lft is the loss between transmit ODU and antenna Lfr is the loss between receiver ODU and antenna Example, the loss is 0.1dB,so the link total loss is： Lt=141.9+0.1+0.1=142.1dB Link reserve margin microwave link reserve margin is： Margin=Gl – Lt For example, for above microwave link，the link reserve margin is： Margin=179.6-142.1=37.5dB For enough field margin, we adjust the antenna size, according to the transmission distance and operation frequency. Figure4-1 defines different gain and loss factor during one microwave link.
Microwave transmission link budget diagram
Link reserve margin
Figure 4-1 microwave link calculation
Common gain of high performance antenna 15GHz frequency antenna main technical specification
Another important characteristic of antenna is polarization. Polarization refers to the direction in which the electrical field (i.e., wave) of a signal is oriented. Normally, horizontal or vertical polarization is used. The
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antenna at each end of the link must take the same polarization. Sometimes, changing the polarization is used to reduce interference.
4.4 Installation position
Each antenna may be mounted on a roof, on a tower, or positioned behind a non-metalized glass window. Weight, wind resistance, grounding and the integrity of the bracket must be considered. The most important requirement for antenna location, however, is a clear line-of-sight (LOS) to the receiving antenna. Clear LOS means that, ideally, the remote antenna location is visible (i.e., no buildings, trees, hills, etc. are blocking the path).Generally, to go farther the antennas must be mounted higher. Locating antennas on buildings or hills is a good start.
4.5 Antenna Interface
ANTENNA INTERFACE：
Frequency Waveguide type Flange type Adapter type
15 GHz R140(WR62) UBR140 PBR140 OR CBR140 Table4-1 antenna interface type
5 Equipment installation
5.1 Overview
The installation procedure will be introduced in this chapter. And you can get some advices combined with the
field installation. Each terminal is consists of an IDU, an ODU and an antenna. The ODU is directly connected
to the antenna. The IDU is connected to the ODU with the IF cable.
Check whether the main equipment and other accessories are complete carefully. If any item is missing during
shipment, please contact our technical support.
The steps of installing the ODU and antenna are as follows:
1st, the antenna bracket should be installed on the pole. 2nd, the antenna with the right polarization is mounted
in a pre-designed direction and orientation. 3rd, since the antenna has slip fit design; the ODU waveguide can
slip into the antenna waveguide receptacle and be fixed in place. 4th, the IF cables can now be connected to the
ODU.
The IDU is installed in a 19"rack, and then connects the IF cable, main service cable, auxiliary cable and
power cable.
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5.2 Installation Flow Chart
The installation flow chart as follows:
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Figure 5-1 Installation flow chart
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5.3 Preparation for Installation
5.3.1 General Guidelines
Installation, maintenance or movement of the antenna system requires qualified and experienced staff. It is recommended that the installation engineer should read the document comprehensively before installing the equipment. If the installation engineer is not familiar with system parts please read the corresponding system instruction.
It is supposed that the power supply and grounding is ready before the installation of the DMW-P system; this manual will not describe those.
5.3.2 Equipment and Unsealed
It is recommended that the user should keep one box with packaging materials just in case the equipment needs to be packed for returning to the vendor for repairing.
One 1+0 terminal is packed in three boxes: IDU, CD-ROM for (Optional), CD-ROM for LCT, and user manual is in one box; and the other two boxes are for ODU(H) and ODU(L) respectively; the antenna and other accessories are packed independently.
Before going to site and unpacking the equipments, you must check the follows first:
Check the part number and serial number of IDU(s), and the shipment info.
Check the IDU options mentioned above and its accessories list on the package list.
Check installation tools t used by the installer. The tools list is shown below.
Tools / Materials Description Cross head screwdriver 1 diameter 3mm, 1 PCS Cross head screwdriver 2 diameter 4mm, 1 PCS
Flat head screwdriver diameter 3mm, 1 PCS
Wrench M10,1 PCS
HP 37721A BER test set (or equivalent) Digital multi-meter 1 PCS Personal computer 1 PCS
Telephone set 1 PCS
Table 5-1 Tools / material Unpacking of equipment The procedure to unpack the equipment is shown below.
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Steps and description Diagram or picture demonstration Step 1. Cut tape of the carton and then open the shipping box, take out accessories, carefully remove the equipment and place it on a clean and flat working platform. Take out the antistatic bag.
Fig 5-2open the shipping box
Step 2. Ensure all the IDU equipment and accessories have been included in the shipment and matched the packing list. Cross check IDU equipment part numbers, product descriptions and the installation data packed for the system to be installed against the packing list.
Fig 5-3comparing the packing list
Step 3. If there is damage or the received equipment is not matching the ordered, please contact our service.
Figure 5-4 contact our service if needed
The main equipment (IDU, ODU and antenna) depends on the specific orders and the major standards (FCC or
ETSI).
It is suggested that you should confirm the received main equipment is correct according to Table 5-3 and 5-4.
5.3.3 Packing List
Double check the IDU and check the accessories and signal cable.
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The bill of material (BOM) of the supplemental parts for every IDU is as follows:
The signal cables may vary depending on the variety of IDU involved.
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Main equipment:
Item # P/N Description
1 1 1U，19’ ，In-door Unit
2 1 CD-ROM for LCT and LCT document
3 1 User manual
Table 5-3 IDU packing list
Item # Qty. description
1 1 Out-door Unit
Table 5-4 ODU packing list
Installation materials and other accessories packing list (In addition to the standard configuration, the other supplemental parts should be provided according to the actual needs)
Item # Qty description
1 4 N type cable head
2 2-8 DB44 turn 8 BNC head cable
3 2 arrester（optional）
4 2 waterproof adhesive tape
5 ≤200m IF cable
6 some ground cable
7 some power cable
8 some wire
Table 5-5Installation materials and other accessories packing list
5.4 Equipment Installation
Equipment installation includes antenna installation, ODU installation and IDU installation.
5.4.1 Antenna Installation Overview
Just the qualified and experienced engineers are allowed to install and maintain the antenna system. The vendor is not responsible for any damages caused by incorrect or unsafe installation.
The antenna provides the Rx/Tx function of RF, usually installed on the tower or top of building. There are 0.3m, 0.6m and 1.2m types of antenna, which will be selected according to the circumstance. The antennas of both ends should adopt the same polarization, usually vertical polarization. To check the accessories of antenna and pole for their installation, see Appendix B and Appendix C.
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5.4.2 Pole Installation
Pole installation must be done before antenna installation. The pole can select hollow steel tube whose diameter isΦ76～Φ127mm with the length 1.5m~2m. It must endure the wind speed 50m/s. The pole and antenna should be spray-painted with antirust material to prevent corrosion. There are following ways to install pole, and in all cases ensure the pole is vertically oriented as much as possible:
Fix the pole onto the high tower. Fix the pole onto the low self-support tower on the top of the building. Enough loading capability of
building-top is required and groundsill must be firmed, usually, adopting pouring cement groundsill and embedding foot screws to fix antenna pole.
Fix the pole onto the parapet wall of the building (the parapet wall must be armored concrete construction and can bear enough resistance).Erect a ф120mm pole (with less than 8m height). The depth of embedding should be longer than 2m, being poured with block cement around 1m2. There should be treads on the pole.
The above installation ways would be selected depending on the circumstance. All of them need to abide by the lightning proof standard and grounding must be well done.
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5.4.3 Antenna Installation
Steps： 1．Antenna hanging parts installation
1）Fix the platen and bone pattern material on the pole Fix the platen and bone pattern material on
the pole with long screws Tighten the nuts Installation finished
Figure 5-6 Installation of platen and bone pattern material 2）Fix the elevation angle adjustment card with the E model material
Figure5-7 installation of elevation angle adjustment card 3）The connection of bone pattern material and E model material Connect the bone pattern material and E model material
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Installation of horizontal adjustment pole
Tighten the screws of E model material
Installation finished
Figure 5-8 Installation E model material 4）The connection of carriage and E model material .
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Figure 5-9 the installation of carrier
2．Transportation When moving the antenna, the lifting point(s) must be fixed and no collision is allowed during the transportation and hoisting.
3． Assembly and installation After the bracket is fixed, aim at the communication direction, then connect antenna with supporting rack. Fix the antenna and bracket together.
Left-skewed Right-skewed
Figure 5-10 the diagram of the antenna left-skewed and right-skewed. 4．Other installation accessories
After completing the antenna installation according to the engineering design, you also need to install other
accessories such as strengthening struts.
5. Installation completed
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Figure5-11 Antenna which is complete installed
5.4.4 Antenna Adjustment
1. Polarization adjustment The default polarization is vertical you can change it to horizontal polarization by rotating the feeder 900
clockwise. 1）Polarization
vertical horizontal
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Figure 5-12 polarization 2）Polarization adjustment 1．Take out the cover and ODU.
2．Losing four nuts from the inside reflecting face and turn over the feeder.
3．Install the cover again, proper connection between ODU and feeder
.
Figure 5-13 Antenna polarization adjustment
2．Horizontal alignment
Rotate the antenna to estimated orientation and tighten the M10 nuts then you can align the antenna using
fine adjust according to the RSL until get the best status.
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Figure 5-14 Horizontal alignment
3. Azimuth alignment
Pitch adjustment of the antenna to do when pitching rotation adjustment bolt wrench
Loosened up and down the fixed bolts, the antenna can be 15 degrees in the range of adjustment
Figure 5-15 Azimuth alignment
5.4.6 ODU Installation
The location for ODU installation should be correctly chosen so that the adjustment and maintenance can be convenient. Pay attention to the polarization and grounding while installing.
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There are two kinds of connections between ODU and the antenna. 1. Connect the ODU to the antenna directly for 1+0 mode. 2. Install two ODUs on the combiner and then connect the combiner to the antenna for 1+1 mode.
Figure 5-161+0/1+1 ODU and antenna installation
If you do not follow the ODU installation procedures, not only the antenna accessories will be damaged, the equipment will not work also. It is advised that read the manual carefully before
the installation. When the problem occurred, please contact our Technical Support.
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The installation steps: 1. Confirm that the local ODU and remote ODU are correctly matched, one side high band and the other side
low band. Rotate the four fixed nuts of ODU to move them to the top end of the screws. .Remove the protective shield of waveguide, and uniformly smear the lubricating grease around the waveguide.
Figure 5-17 Preparation for installation
2. Insert the four fixed screws of ODU into the four gourd-shaped holes of the antenna flange. Make sure the directions of the antenna flange waveguide and the ODU waveguide are consistent. Rotate the ODU counter-clockwise until the four screws stop at the end of the corresponding mounting slots Fix the four nuts by screwing down with the wrench on a progressive basis to ensure the ODU is mounted symmetrically onto the antenna.
3. Install the N-type male connector to the one end of the coaxial cable (for example, type 8DFB Installation materials and other accessories pack list). It is recommended that the maximum cable length is less than 300m although the cable length is typically 75 m or so
4. Tie the coaxial cable to the equipment along the pole in a stress reducing manner to avoid too much tension on the subsequent cable interface connectors.
5. Connect the coaxial cable and ODU with the N type male connector, then use the waterproof tape to cover connector interface to prevent water from entering the connector. The tape should be layered in a water skirting direction (rather than water trapping direction)
6. Connect the grounding cable to the grounding bolt of ODU, and then connect the other end of the cable to the ground point.
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Figure 5-18 Grounding
Pay attention to the site properties indicated on the label. Before installation, ensure the type, frequency band and high/low station are correct and the two ends of the link using a pair of matched ODUs.
Ensure the polarization of the two ends is the same
5.4.7 IDU Installation
The mounting procedure for the IDU is shown below.
(a) Preparing tools and materials required for mounting and dismantling::
Cross head screwdrivers, with diameter 3mm and 4mm
Wrench，M10.
Screws as presented in the accessories.
(b) Dismantling IDU from 19 inch rack (if necessary) is shown below.
Steps and description Diagram or picture demonstration
Step 1. Switch off the power of the equipment;
then hold the IDU and remove four screws each from both sides
Figure 5-19 remove cables
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Step 2. Take out the IDU and place the IDU on a
clean, flat working platform
Fig 5-20 take out IDU
(c) Mounting method of IDU is shown below.
Steps and description Diagram or picture demonstration
Step 1. Put the IDU in the mount position on the
19 inch rack.
Fig 5-21 put the IDU on the rack
Step 2. Tighten the four screws (M5) on
mounting flanges to fix the IDU
Fig 5-22 Tighten the four screws on mounting flanges
Frame Grounding
After mounting IDU, perform chassis grounding. See the figure below the location of the ground
connector indicated on the front panel of IDU.
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Fig 5-23 Location of ground connector of IDU Solder the lug to the end of the ground wire. Connect the ground of IDU to the indoor earth terminal by
tying the ground wire to the ground stud by sandwiching the ground lug between the flat
washer, and spring washer and locking the assembly down by the screw nut . Tighten the nut
in a clockwise direction. See below.
Fig 5-24 Frame grounding
The use of incorrect voltage or mistake in grounding may result in severe personal injury or equipment damage.
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Fig 5-24 Grounding for system
To avoid surge currents caused by lightning, connect the equipment earth to ground of lightning rod at ground level, and the ground of IF coaxial-cable outside (other on the tower) must be protected by the lightning rod.
The overall connection is shown below.
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Fig5.-26 IDU normal connection
Ensure the power switch is on the “OFF” position
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Steps and description Diagram or picture demonstration
Step 1. Connect IF coaxial-cable to the “ODU /
IF” connector and tighten the ring in a clockwise direction.
Fig 5-27 Connect IF signal cable
Step 2. Connect E1 signal cable(s) to the D-sub
connector(s). And then tighten both connector mounting screws in a clockwise direction.
Fig 5-28 Connect E1 signal cables
Step 3. Connect external alarm cable to the
D-sub connector. And then tighten the screws in a clockwise direction. (if necessary)
power cable would be made up. Get the power connector from the accessories pack and then loosen the screws on the connector, insert the power wires (which may be sourced or supplied by the installer) into the holes of the connector and then tighten the screws. Notice the color of the wires against GND pin and voltage pin referring to the power socket on the IDU.
Fig 5-32 Supply power cable
Step 7. Connect power supply cable to the
power socket connector. And then tighten the screws (flanges) in a clockwise direction.
Fig 5-33Connect power supply cable
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Fig 5-34 Basic cable connection and installation
5.4.8 Accessories Installation
5.4.8.1 IF cable grounding
When the distance between IDU and ODU is long than 50 m, the IF cable should be grounded in every 50m. Steps： 1. Check grounding cable
2. Remove the top layer of the IF cable plastic shield to expose the ground foil and/or mesh.
3. Wrap the copper sheet around the exposed portion of the IF cable
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4. Cover the copper wrapping with silicone putty
5. Cover the silicone putting with weather insulation tape
6. Finish
5.4.8.2 Arrester installation
Installation steps:
1. Check the arrester with an ohmmeter on its input or output pin with respect to ground. It should be 50
ohms.
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2. Connect the arrester with ODU. Notice that N-type male connector is connected with ODU, N-type
female connector is connected with IF cable.
3. Cover the connector with insulation tape
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4. Connect the grounding cable
5.The above steps are finished before ODU installation on the tower。
6.Install the ODU with arrester on the tower and connect the grounding cable with tower.
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6． LCT
There are three methods for DMW-P IDU management: 1．LCT 2．Keyboard and LCD on front panel (if the LCD option is chosen) 3．EMS The equipment setup after installation can be carried out by using method 1or 2. This chapter describes the testing and function configuration.
6.1 LCT introduction
LCT is the local management software forDMW-P PDH digital microwave communication system. By using LCT we can easily check and configure the parameters of IDU and ODU of both sites (if there are already linked).LCT is the often used software for field installation, equipment setup and fieldwork maintenance. Features：
Operate the local site just by connecting the equipment. Operate the remote site while wireless link is OK. Reflect the real-time equipment status. Small size and multi-function. Green installation.
The LCT need to be installed with the Setup File on CD-ROM. The application has the following PC requirements:
Memory: 128 MB RAM Disk: 1 GB free hard disk space Processor: Pentium 3 or higher Network: 10/100BaseT NIC Graphics: Card and monitor that support 1024×768 screen resolution with 16 bit color Operating system: Windows 2000/XP Microsoft Explorer 5.01 or later.
6.1.1Starting LCT
Set the CD-ROM packaged with IDU into the PC. After this, run LCT.jar on desktop into startup interface of LCT. Then start the IDU.
Modify the PC IP address to ensure the PC and IDU are in the same subnet.
6.1.2 LCT trees
【Login System】
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【Main Menu】 【Status】 【Link Status】 【Power Status】 【RF Unit Info】 【Test】 【Link Loop Test】 【Hardware Test】 【RF PA Mute】 【Configure】
input“2” ，“Enter” to enter in RF parameters setting
After setting，press “Esc” to exit
Channel Number
Input “3”，“Enter” to enter bandwidth setting
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After setting, press “Esc” to exit
RF Power
Input“4”，“Enter” to enter the ODU parameters setting.
Input a number, for example：20， click key“2” and key“0”，than press “Enter”.
After setting，press “Esc” to exit.
Apply New RF
After setting，input “5”，“Enter” to save them, success
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After saving ，press “Esc” to exit “RF Unit”
Baseband Function
Press“1”and“Enter” to enter the Baseband Function page.
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Press “Esc” to exit the Baseband Function page.
SNMP Setting
Press“2” and “Enter” to enter the SNMP Setting page.
IP//Check the current IDU IP Mask IP//Check the mask IP Gateway IP//Check the gateway IP Manager IP//Check the manager IP
1． Change IP/ Set the current IDU IP 2． Change Mask IP// Set the mask IP 3． Change Gateway IP// Set the gateway IP 4． Change Manager IP// Set the manager IP
Change IP
Press “1”and “Enter” to enter the Change IP page.， Press “Enter ”and input IP[4]=192，input IP[3]=168，
input IP[2]=12，Input IP[1]=123，then press “Enter”. The IDU IP will change to 192.168.12.123.
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Change Mask IP
Press “2”and “Enter” to enter the Change MASK IP page， press “Enter ”and input IP[4]=255，input
IP[3]=255，input IP[2]=255，Input IP[1]=0，then press “Enter”. The IDU MASK IP will change to
255.255.255.0.
Change Gateway IP
Press “3”and “Enter” to enter Change IP Press “Enter ”and input IP[4]=192，input IP[3]=168，input
IP[2]=12，Input IP[1]=1，then press “Enter” The IDU gateway IP will change to 192.168.12.1.
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Change Manager IP
Press “4”and “Enter” to enter the Change IP page， press “Enter ”and input IP[4]=192，input IP[3]=168，input
IP[2]=12，Input IP[1]=2，then press “Enter” The IDU manager IP will change to 192.168.12.2.
This manager IP must be the same as your PC, otherwise you can’t check the alarm status.
Press “Esc” to return General Settings GUI.
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Auto Alarm Function
Input “3”, press “Enter”, then the state is changed to “ON” (default OFF).
Auto LCM Screen Protect
Input “4” select “Auto LCM Screen Protect”, and press “Enter”. Then the state is changed to “ON”
(default OFF).
When “Auto LCM Screen Protect” is on, the LCD backlight is turned out for 30 seconds if keys are not
pressed. The LCD backlight is turned on upon any key pressed.
External Alarm Output
Input “6”, select” External Alarm Output 1”, and press “Enter”. Then the state is changed to
“defined”(Alarm output interface is set to high level), It’s default state is Undefined. Configure the other 4
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channels in the same way.
Change Password：
Input “4” and press “Enter”, it will display “Please Enter New Password” in the menu. Then enter
password with length from 1 to 8 characters.
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Change Station Name
Input “Change Station Name”, then press “Enter” to change station name. The length of ID cannot be more than
8 characters.
Load Factory Setting
Choose Load Factory Setting，Press “Enter” to load factory settings..
IDU IP：192.168.12.162
Alarm IP：192.168.12.161
Protect: 1+0
Protect mode: standby
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L
Save Current Setting
Set 2，3，4，5，9，Choose “Save Current Setting” ， Press “Enter”。
Protection Setting
Choose Protection Setting，press ”Enter” to enter 1+1 Protection. The default state is 1+0
Non-protection，
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If one wishes to configure to 1+1 Protection Choose Protection：， Press “Enter” into 1+1 Protection
configure。
Protection：// enter protection state. Press this key against will go back to the state of “1+0
Non-protection”
Working Mode // working mode: slave or master. Press “enter” key to change anther mode.
Switch Mode // switching mode: auto switching and half-hand switching. In auto switching mode,
switching is done based on some preset conditions without intervention needed.. In manual switching, even
when the link threshold is near -96dBm, manual intervention is required to effect the switching. Switch//
Switch mode， with two options available: revertible and non-revertible.: “Revertible” means that after
switching to the standby equipment, when the faults are clear, the system is automatically switched back to the
original link equipment configuration. “Non-Revertible” means that after switching to the standby
equipment, even when the faults are cleared, the system will stay in the standby equipment until manual
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intervention to switch back to the original configuration. Protection IP// Master/slave IP setting, as
examples, . master IP is 192.168.12 .1; slave IP is 192.168 .12.2.
Status// could see the linking state of slave equipment
“Esc” back to main interface
Remote Access
Enter Remote Access
Press “Enter” to enter the Remote Access interface
With this interface user can control the remote equipment. If linking is normal, user can enter the
menu ”remote” to manipulate the remote equipment, or user can press the “cancel” command to get out off the
remote access interface. If linking is interrupted and the system has no response, use need to start the menu of
LCT..
Back To Main Menu：Back To Main Menu
Access Remote Equipment ：Access Remote Equipment
Access Remote Equipment
Enter “3” ,press” Enter” to enter the Access Remote Equipment interface
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Press” Esc” back to main menu
Info
To input Info ，press ” Enter” to enter the Info interface
Model ：System Type
Capacity ：IDU capacity
IP ：IDU IP
Serial Number ：IDU serial number
Firmware Version ：Hardware version
Software Version ：Software version
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Reset: System Reset
Input “6” and press “Enter”, then the GUI will prompt you to restart the system. Input “Y”. Press “Enter” to
restart system. After this operation, the system parameters will be reloaded and system be restarted.
Exit
This command will shutdown LCT.
No execute this command when system is under normal condition!
6.2 Quick Start
This chapter will make you know installation and using the equipment quickly.
6.2.1 Preparation
1. First of all you should have the site list. Site info position No.
Site name Site add Site type Long. Lat. Alt. 1 CD1 xxx RELAY 103.98 30.02 5001 CD2 xxx CENTER 104.11 30.16 600
Equip. RF Capacity BW
TYPE Manufacture H/L Channel Tx Fre Rx Fre 4E1 7MHz DMW-P FIBERHOME H 35 14742.5MHz 15162.5MHz 4E1 7MHz DMW-P FIBERHOME L 35 15162.5MHz 14742.5MHz
Link info Antenna
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position Azimuth Remote site Distance
TX Power RXL TYPE Manufacturer
S38.8E 0.29° CD2 20km 18dBm -70dBm 0.6m high per FIBERHOME N38.8W -0.29° CD1 20km 18dBm -70dBm 0.6m high per FIBERHOME
2. Select equipment according to the following points:
Enough transmission capacity
H/L ODU
Frequency interference
Antenna position and azimuth
Enough fade margin
3. Equipment checking
Including IDU, ODU, antenna, and tools (refer to 5.3)
H station：Tx Fre is higher than Rx Fre
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L station：Tx Fre is less than Rx Fre
4. Link connection
Link sample：
Connect the IDU to power supply
Connect the IDU and ODU
Connect the ODU with attenuator
Connect the laptop and IDU
Grounding for IDU and ODU
6.2.2 Equipment Setup
1. Set the CD-ROM packaged with IDU into the PC，Release the file to folder。
2.Click LCT.Jar。
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3. Switch on the IDU
4.Type the IP（Default Ip is 192.168.12.162）
Click
You can get many parameters when connection is successful.
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Open LCT ，enter Status ->RF Unit Info menu。
6. Repeat the step 4 and 5 in each IDU and make sure the ODU is H/L
7. Enter local configure panel
Setting BW：
Enter select frequency configuration panel，select parameter。
After accomplishing to set ODU parameter，return RF Unit->Apply New RF ,Save Setting。
12. Switch on the PA
Enter->system test
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Press “Enter” changed RF PA Mute status.
12. Check the configuration.
Enter Status->RF Unit Info
13.Repeat the step7-12 on the another IDU。
14. Link connection is successful.
Enter status –> Link Status
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H/L configure
For a quick start, it does not need to set the IDU IP address, but it should be determined in
further configuration for function and mode.
Failure message window will pop out when an error occurred during connecting IDU or setting
the parameters. The message indicates where and why the error occurred while user can take simple
troubleshooting.
If there is any problem that cannot be solved, refer to Chapter 9 for help.
6.2.3 Field installation
You can start the installation on site after the equipment setup. Check the Rxl after finishing the installation by LCT. If the Rxl is too low pls refer to 6.2.4
6.2.4 Antenna alignment
If RSSI is quite different from the link budget or even no receiving signal, the antennas must be aligned. In general, the
alignment is indispensable after installation. It contains horizontal adjustment, pitch angle adjustment and polarization
adjustment, seeing Section 5.4.4 for specific methods.
To align the antennas：
1. Verify that both antennas have the same polarization (horizontal/vertical).
2. Check the connections of the cables are correct and reliable.
3. The line of sight must be ok while there is no obstruction between the two sites.
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4. Slowly move the local antenna elevation axis (the azimuth axis should be locked) until you get the best signal in local
(monitor the RSSI or the voltage with a multi-meter).Lock the elevation axis.
5. Slowly move the remote antenna elevation axis (the azimuth axis should be locked) until you get the best signal in local
(monitor the RSSI or measure the voltage with a multi-meter) .Lock the elevation axis.
6. Slowly move the local elevation azimuth axis (the elevation axis should be locked) until you get the best signal in local
(monitor the RSSI or measure the voltage with a multi-meter) .Lock the azimuth axis.
7. Slowly move the remote elevation azimuth axis (the elevation axis should be locked) until you see the best signal in local
(monitor the RSSI or measure the voltage with a multi-meter) .Lock the azimuth axis.
8. Repeat steps 4 to 7 until the RSSI is equal or as close as possible to the calculated receive signal.
9. Tighten the antenna azimuth axis and elevation axis.
10. If the alignment cannot achieve the desired RSSI, reduce the distance of the link.
11. If the distance cannot be reduced, consider the replacement of a larger-diameter antenna.
12. Fix the waveguide interface cable connector and etc.
6.2.5 Further Configuration
After the quick start, user should test the link and equipment and configure the operating mode, network and
services. For further configuration, see the next Section 6.3
6.3 Equipment Service Configuration
After the establishment of wireless link, equipment should be configured for basic service requirements
and be in normal work status.
Operational configuration includes：
1+0 mode configuration
1+1 mode configuration
Route function configuration
6.3.1 1+0 Mode Configuration
1+0 is the basic mode of equipment .It can be used for normal communications and service supports.
6.3.1.1 Configuration Steps
1. Aligning the antennas
2. After the establishment of wireless link configure the RF parameters according to the actual needs. LCT
has the capabilities for remote query and configuration, so that both sites can be set up locally
3. Configure IP address for A and B. Let them in the same subnet with mask 255.255.255.0
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4. Configure Station A and Station B respectively: 1+0 mode Enter configure->protection setting
5. In this mode, the default switch mode is Auto that cannot be modified, and it will not affect the function.
The protection IDU IP cannot be configured by default
6.3.1.2 1+0 Link Performance Test
In order to verify the basic communication performance, use 1 +0 mode for link test
Link BER test can select a single E1 channel or multi E1 channels by connecting one by one with BNC
connector.
1．Single-track BER test, as follows:
N
*E1 Interface
Multiplexer/
Dem
ultipler
IF MO
DEM
transceiver
transceiver
IF MO
DEM
Multiplexer/
Dem
ultipler
N*E1
Interface
Figure 6-3 single-track BER test
From Station A to Station B: a standard E1 test signal PRBS15 is transmitted in station A and receive the
signal in stations B. If there is no error, the link is normal.
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From Station B to Station A:a standard E1 test signal PRBS15 is transmitted in station B and receive the
signal in stations A. If there is no error, the link is normal.
2. Loop BER test, as follows:
Figure 6-4 loop BER test
The loop starts and terminates in both Station A (or B) .Test the bit error ratio at the end of Station A (or
B). If there is no error, the link is normal.
3. Local E1 interface loopback BER test, as follows
N*E1
Interface
Multiplexer/
Dem
ultipler
IF MO
DEM
transceiver
transceiver
IF MO
DEM
Multiplexer/
Dem
ultipler
N*E1
Interface
Figure 6-5 local E1 interface loopback BER test
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Connect PC and set up E1 interfaces local loopback by LCT. Interface1 to 4 is optional. Loopback
status can be moxed.
Enter test->Link Loop Test->Local Loop Test
Press “enter” change status, if it is looped, local loop setting success, else no.
Loop starts from the Station A, and circles at the local E1 interfaces of Station A. If there is no error,
the link is normal.
Station A and Station B carry out respectively.
4. Remote E1 interfaces loopback BER test, as follows:
N*E1
Interface
Multiplexer/
Dem
ultipler
IF MO
DEM
transceiver
transceiver
IF MO
DEM
Multiplexer/
Dem
ultipler
N*E1
Interface
Figure 6-6 remote E1 interfaces loopback BER test
Connected PC and set up E1 interfaces remote loopback by LCT. Interface1 to 4 is optional.
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Loopback status can be mixed.
Enter test->Link Loop Test->Remote Loop Test
Press “enter” change status, if it is looped, local loop setting success, else no.
Loop starts from the Station A, and circles at the remote E1 interfaces of Station B. If there is
no error, the link is normal.
Station A and Station B carry out respectively.
Method 1 and 2 can be implemented without configuration, but need to be operated at both ends.
Method 3 and 4 need to set up the loopback state of E1 interfaces locally, but the operation can be
completed at one end。
Test Integrity：2>4>1>3. Method 2 can test all the signal channels.
Method 4 can test all the signal channels, without the duplex channels between the remote
E1 interfaces and the external equipment.
Method 1 can test the channels between the local external equipment and the remote
external equipment.
Method 3 can only test the duplex channels between the local E1 interfaces and the local
external equipment.
A reasonable choice of test methods can quickly complete the installation and commission. Using method 3+4 can ensure the Integrity and convenience.
If the BER testing result can not satisfy the requirement, refer to troubleshooting.
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6.3.2 1+1 Mode Configuration
System supports 1 +1 hot standby mode with same frequency improving system reliability if deployed.
6.3.2. 1 1+1 Installation
Requirements(for one terminal )： two IDUs two ODUs two IF cables one Y cable one RJ-45 protection cable two power cables one combiner
Installation for 1+1 mode needs two IDUs and each IDU connects to one ODU with an IF cable separately. Connect the master IDU and the standby slave IDU with a Y cable. The Y cable allows the two IDUs to share E1 data. Which one of the two IDUs is actually controlled by relay switches on the switch box connected to the Y cable. The master IDU and the standby IDU with a RJ-45 cable. Through this cable, the two IDUs can communicate with each other and detect work status.
Installation steps：
1. Antennas alignment completed. 2. Install the two ODUs (with the same properties) onto the combiner. 1）Put the four fixed screws of ODU into the four gourd-shaped holes of the combine flange Make
sure the directions of the combiner waveguide and the ODU waveguide are consistent . Rotate the ODU about 30 degrees, so that the ODU is in the bear card of gourd-shaped hole. Fix the four nuts by wrenching down the nuts as in Fig. 6-7. 2）Install another ODU in the same way.
Figure 6-7
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Figure 6-8
3）Put the four fixed screws of combiner into the four gourd-shaped holes of the antenna flange. Make sure the directions of the combine waveguide and the antenna waveguide are consistent in orientation to achieve the required polarization. Rotate the combiner about 30 degrees, so that the combiner is in the bear card of gourd-shaped hole. Fix the four nuts by wrenching them down,
Figure 6-9
3. In turn, connect each IDU to the respective ODU with an IF cable
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4. Connect E1 interfaces of the host IDU and the standby IDU with a Y cable and 1+1 transfrom board. As in Figure 6-10
Figure 6-10 5. Connect LAN interfaces of the host IDU and the standby IDU with a protection cable. 6. Install power cable for each IDU.
6.3.2.2 1+1 Configuration
In this mode the master link is switched to the standby link if abnormity is detected by one of the two master IDUs. After switching, the standby will continue to operate even if the original abnormity has cleared. Manual intervention is needed to switch back to the original master link. Upon detection of abnormity by one of the two master IDUs meeting switching to the standby link criteria, the two master IDUs will: set their own ODUs transmit to mute, inform their respective counterpart standby IDUs to activate their standby ODUs and start transmitting, and switch both data paths from master IDUs to standby IDUs. Configuration steps：
1．Ensure that all connections are correct. 2． Power on all the IDUs. 3．Set Host A IP address Local configure panel, enter configure->General Settings->Change IP
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Press “Enter”, input IP: 192.168.12.102,”enter” .
mode：1+1，status：host switch mode：auto，Switch :non-revertible, Protection IP：IP of IDU(B).
4．Set standby B IP address
Local configure panel：change IP 192.168.12.101
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mode：1+1，status：standby，switch mode：auto，Switch :non-revertible ,protection IP：IP of IDU(A)。
5． Configure the same RF parameters for IDU A and IDU B
6．Check the Master ODU is ON，
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Standby ODU is OFF 。
7．Repeat step 1 to 6 to complete the remote 1+1 configuration 8．Check whether the RSSI of the two ODUs of one side (local or remote) are the same. If there is an obvious difference between them such as >8 dB and both of them are higher than the threshold (there is no RRSI too low alarm), investigat the cause of the lower RSSI and try to replace it if necessary. The LINK indicators of four IDUs should be green and there is no alarm in the system.
10．Try to switch manually at local end. The LINK indicators of four IDUs should be green and there is no alarm in the system after the switch. 11．Try to switch manually at remote end. The LINK indicators of four IDUs should be green and there is no alarm in the system after the switch. 12．Repeat steps 9 to 10 and then set switch mode of all IDUs to auto.
6.3.2.4 Manual 1+1 Configuration
Configure host IDU of switch mode: manual, active select: Master Link, host switch standby.
mode：1+1，status：host ,switch mode：manual, Protection IP：IP of IDU (B).
Manual switch is operated at the host IDU.
Start field installation after finishing the equipment setup.
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6.3.2.4 Configuration Rules for 1 + 1 Mode
Setting the protected mode requires the user to follow some basic rules. In addition to the requirements stated in the table, it is necessary to verify that the link (Remote and Local) parameters comply with the DMW-P system parameters requirement. Link Capacity and frequency (channel number) should be identical on both sides.
Parameter 1+1 Hot Standby Mode
ODU Bandwidth Identical
Frequency (channel number) Identical
Tx power Identical
MUTE status Master UNMUTE, standby MUTE
IDU LAN interface IP address Different, but in the same subnet
WAN interface IP address Different
Server IP address Identical
Modulation Identical
Link Capacity Identical
Table 6-1 Protected mode Requirements
6.4 Function test and commission
You can check the work status during the commission. You can monitor the equipment by the alarm information provided by LCT and EMS. But first of all you should switch on the alarm reporting function and set correct IP address. When you meet any problem during the installation and commission please refer to chapter 9.
7.Equipment Monitoring（By LCD And Keyboard On Front Panel）
7.1 Summary
This chapter gives a introduction how to configure, monitor and control the system with the LED and keypad in the front panel of the IDU.
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Figure7-1 LCD panel and keyboard
7.2 Main Functions
7.2.1 Data-link Test and Status Warning
User can test and review the Branch Link and Multiplex Link of each E1. It includes Mux-link loopback test, interrupt check and AIS warning; Mux-link BER test、automatic link switch and system delay re-start.
7.2.2 Equipment Status and Alarm Management
User can check the equipment status and alarm while operating, and define the reporting way and alarm level.
7.2.3 Equipment Maintenance and Parameter Setting
User can save the parameters to prevent parameter losing after power off. User can set the parameter quite easily, such as open/close the branch link; backup way selection of multiplex link RF parameter setting and save. Equipment Maintenance includes: Loop link test for local and remote sites..
7.2.4 Remote Control
User can control the remote equipment through the local equipment.
“Esc”(return and exit) Return to upper layer in the menu or exit operation
“” (up or increase) Move up in the menu, or increase 1 from current number
“” (Down or decrease) Move down in the menu, or decrease 1 from current number
“ ”（OK） （1） Enter the main menu after power up （2） Select the active menu bar （3） Save current status or return
“ ”（active） The symbol “ ” means the pointed menu bar is currently active, press the key “ ” would enter in it.
【Main Menu】
1. Status
2. Test
3. Configuration
4. Remote Access
5. Information
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7.5 LCD Display
LCD displays messages and commands intuitively and user can operate friendly.
After power up, “Fiber Home” would be displayed in
the LED, as the right, than you can operate with the LED
and key buttons.
Press down “ ”, the main menu would appear as the right.
Main Menu
Main menu has 5 sub-menus:
1. Status: inquiring working status or parameters of the system
2. Test: inquiring self test status or cancelling the self test mode
3. Configuration: set up parameters or working mode of the local system
4. Remote Access: inquiring working status or setting working mode of the remote system
5. Information: inquiring the basic information of the local system
System Status
Pressing “” or “” to active “status” menu, than press “ ” to enter in it. Status menu has 6 sub-menus as the right. 1. Link& ports: inquiring E1 interfaces status 2. Modem: inquiring Modem status 3. RF Unit Info: inquiring RF Unit status 4. Bit error rat: inquiring current bit error rate of the link 5. Powers: inquiring parameters of the power supply 6. Alarms: inquiring current alarm status of the system
Link& ports
Active “Link& ports” bar with “” or “” in the
“status” menu, than enter in it with “ ”.
“Link& ports” has 5 choices as the right, you can
inquire every E1 interface from 01 to 04, “INT” means E1
signal is lost, ”NORMAL” means E1 signal is detected. You
can also inquire the MUX and DEMUX circuit status, “SYN”
【Link&Ports】
* E1#01: INT/NORMAL
* E1#02: INT/NORMAL
* E1#03: INT/NORMAL
* E1#04: INT/NORMAL
【Main Menu】
1. Status
2. Test
3. Configuration
4. Remote Access
5. Information
【System Status】
1. Link &ports
2. Modem
3. RF Unit Info
4. Bit error rat
5. Powers
Fiber Home
DMW-P 4E1
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means the circuit has lost synchronization, “NORMAL”
means the circuit is working well.
After inquiring, you can return to upper layer “Status”
by pressing “Esc”.
Modem To active “Modem” bar with “” or “” in the
“status” menu, than enter in it with “ ”.
In the “Modem Status” menu, you can inquire the
MODEM status and the LO status.
“Normal” means the MODEM is well, “ABnomal”
means it is in trouble.
“TXIF LO” and “RXIF LO” means transmitting LO and
receiving LO in the IF circuit.
“Locked” means the LO is in normal status, “Unlocked”
means the LO is in trouble.
After inquiring, you can return to upper layer “Status”
by pressing “Esc”.
RF Unit info To active “RF Unit Info” bar with “” or “” in the
“status” menu, than enter in it with “ ”.
The “RF Unit info” menu gives a list of parameters of
the ODU currently used as the right.
Channel：The current channel No in the 15G band
RSSI ：Currently received signal strength detected in
dBm
RF power: Currently transmitting power in dB
Bandwidth：Bandwidth of the channel
RF Mute：Transmitting status, closed or open
Modem：Modulation supported(QPSK supported)
Capacity ： Transmission capacity supported(4E1
supported)
Power Range：Transmitting power range
【RF Unit Info】
：Channel 30
RSSI：-56
RF Power：20
Bandwidth：7 .00M
：RF Mute off
Modem: QPSK
Capacity:4E1
Power Range: 0~20
Type:15GHz
Version:ver6
Station:HIGH
Option:OPT7
ManufactureData:20080925
SN:20089333018
Voltage:Normal
Temp:17
Alarm:
*Temp Alarm:NO
【Modem Status】
1. Modem Status
ABnomal/normal
： TXIF LO Locked
： RXIF LO Locked
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Type：Working band of the ODU
Version：Version number of the ODU used
Station：Transmitting and receiving carrier of the ODU,
“HIGH” means transmitting with higher carrier of the
channel, “LOW” means transmitting with lower carrier
of the channel.
Option：Option parameter of the ODU
Manufacture Data：Manufacturing date of the ODU
SN：20089333018: serial number of the ODU
Voltage：Allowable voltage range
Temp：Current temperature in the ODU
Alarm: 4 kinds of alarm status in the ODU
After inquiring, you can return to upper layer “Status”
by pressing “Esc”.
Bit error rate To active “Bit error rate” bar with “” or “” in the
“status” menu, than enter in it with “ ”.
The bit error rate of the link is displayed.
After inquiring, you can return to upper layer “Status”
by pressing “Esc”.
Powers To active “Power” bar with “” or “” in the “status”
menu, than enter in it with “ ”.
Current voltages of 2 kinds of power supply in the IDU
are displayed.
After inquiring, you can return to upper layer “Status”
by pressing “Esc”.
Test Pressing “” or “” to active “test” menu, than
press ” ” to enter in it. “test” menu has 7 sub-menus as
【Bit error rate】
0
【Powers】
+5VDC:5.12V
+12VDC:11.9V
【test】
1 Link Loop
2 Digital L_Loop
3 Digital R Loop
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the right. 1 Link Loop: link loop back
2 Digital L_Loop: local loop back setup
3 Digital R_Loop: remote loop back setup
4 Cancel L_Loop: local loop back cancel
5 Cancel R_Loop: remote loop back cancel
6 Reset System: reset the system
7 Hardware Test: hardware self test
Link LOOP To active “link loop” bar with “” or “” in the “test”
menu, than enter in it with “ ”.
After inquiring, you can return to upper layer “Status”
by pressing “Esc”.
Digital L_Loop To active “Digital L _Loop” bar with “” or “” in the
“test” menu, than enter in it with “ ”.
Local loop Back statuses of local E1 interface are
displayed, Normal or Loopback.
After inquiring, you can return to upper layer “Status”
by pressing “Esc”.
Digital R_Loop To active “Digital R_Loop” bar with “” or “” in the
“test” menu, than enter in it with “ ”.
Remote Loop Back statuses of local E1 interface are
displayed, Normal or Loopback.
After inquiring, you can return to upper layer “Status”
by pressing “Esc”.
Cancel L_Loop To active “Cancel L_Loop” bar with “” or “” in the
“test” menu, than enter in it with “ ”. Cancel local
loopbacked interface in Local
After Cancel, you can return to upper layer “Status” by
【Digital L_Loop】
E1#01 loopback E1#02 loopback
E1#03 loopback E1#04 loopback
【Digital R_Loop】
E1#01 Get Suc Remote Loopbacked
【Digital L_Loop】
E1#01 Get Suc Local Loopbacked
【Digital R_Loop】
E1#01 loopback E1#02 loopback
E1#03 loopback E1#04 loopback
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pressing “Esc”.
Cancel R_Loop To active “Cancel R_Loop” bar with “” or “” in the
“test” menu, than enter in it with “ ”. Cancel Remote
loopbacked interface in Local
After Cancel, you can return to upper layer “Status” by
pressing “Esc”.
Reset System To active “Reset System” bar with “” or “” in the
“test” menu, than reset system in it with “ ”.
Configure
Pressing “” or “” to active “Configure” menu, than
press ” ” to enter in it. “Configure” menu has 6
sub-menus as the right.
1. RF Unit: setup parameters of ODU
2. General: setup general parameters
3. Ethernet: setup Ethernet interface
4. Load Factory: recovery factory parameters
5. Protection: setup 1+1 protection mode
6. Local loop: setup local loop back mode
RF Unit
To active “RF Unit” bar with “” or “” in the
“configure” menu, than enter in it with “ ”.
Channel To active “channel” bar with “” or “” in the “RF
To active “Language” bar with “” or “” in the “Main”
menu, enter Language menu with “ ”.
【Language】
2. English 3. Chinese
【RFU Info】
：Channel 30
RSSI：-56
RF Power：20
Bandwidth：7 .00M
：RF Mute off
Modem: QPSK
Capacity:4E1
Power Range: 0~20
Type:15GHz
Version:ver6
Station:HIGH
Option:OPT7
ManufactureData:20080925
SN:20089333018
Voltage:Normal
Temp:17
Alarm:
*Temp Alarm:NO
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8．EMS System
8.1 Overview
DMW-P system can be set up according to the demand as a large or medium-sized network. EMS is the
network element management software used to monitor the status of various network elements.EMS can
adjust parameters of network elements according to the actual needs in order to ensure the smooth conduct of
communications. It can also show the network elements and their attributes.
Through EMS, manager can configure the DMW-P system, monitor and analyze the performance, adjust
parameters according to the displayed information and report network events.
EMS adopts an operating environment which is similar with Microsoft Windows, a simple network
management protocol to carry out communications and a platform based on TCP/IP for link management.
EMS for DMW-P system has two parts:
EMS，installed on PC.
SNMP agent, embedded in IDU.
EMS and agent use SNMP to communicate with each other on TCP/IP. The SNMP agent includes a standard
database and more than one SNMP Management Information Databases (MIBs).EMS communicates
databases of the agent in order to obtain NE information. Therefore, from the functional point of view, EMS is
regarded as a MASTER and agent is regarded as a SLAVE.
For this master-slave relationship, there is an exception when dealing with the alarm information reported
from the slave. These information or alarms that are sent to EMS from slaves are called traps.
EMS cannot receive traps directly until the destination IP of these traps has been user-defined..
8.2 Features
EMS has features as follows:
WINDOWS-based graphical environment for user interface
Configuration for connecting sites
Observation for all data ports
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Remote Network Access
Transmission monitoring
Management for alarm, state, security, performance, test and configuration
8.3 Functions
EMS includes five functions：
1. Configuration management
Configuration management includes installation configuration and service configuration.
2. Alarm management
Alarm management includes alarm analysis, alarm inquiry and alarm solution.
3. Security management
Security management includes login management, user right management and log management.
4. Performance management
Performance management includes real time performance collection, history performance collection,
threshold setting and performance monitoring.
5. System management
System management includes network topology management, language switch, data backup etc.
8.4 Configuration Management
Configuration module is one of the most important modules of the EMS, including installation configuration
and service configuration.
Installation configuration:
NE management: Provide functions to create and delete the NE
NE group management: Provide function to create the management group
NE topology management: Provide functions to add a new topology modify an existing topology and display
the topology.
Link configuration: Provide the link connection and management functions.
Service configuration
Service configuration with end to end: user can use EMS to configure the service of target NE.
8.5 Alarm Management
Alarm management module is one of the most important modules of the EMS system, providing functions of
alarm monitoring, data mining, alarm filtering and alarm inquiring etc.
Alarm monitoring: The system provides function to monitor faults of the current network, and refresh
the fault status of the network node in real time. When the alarm appears, user can find the fault node
just by carrying out one action.
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Data mining: Alarm correlation data mining function is that you can obtain the corresponding alarm
information through carrying out one action. Such as alarm name, equipment type etc.
Alarm compression: When the same alarm appears at the same NE, the system will count the alarm
number to reduce the amount of alarm information effectively.
Alarm matching: When the fault has been solved, the system will automatically search the
corresponding alarm and refresh its status to the restoration.
Alarm fast handling: Including alarm confirming, alarm clearing.
Alarm filtering: User can set the alarm filtering policy according to the alarm type and the equipment
location.
8.6 Security Management
Security management module is one of the most important modules of the EMS and focus on managing the
users’ access and operation right and recording log information.
Login/quit management: Provide the login management and identification management.
User management: Provide function to create a newer user, delete an existing user and modify the user
right.
User management domain:Provide function to set the range for user management.
User right management: Provide function to configure the user right.
Administrator mangement domain：Setting the administrator authority.
Security log:Provide log inquiry function.
8.7 Performance Management
Performance management module is used for performance collection and management.
Performance data collection:Provide function to collect the parameters of the hardware system.
Current performance inquiry: Provide function to inquire the current performance data.
8.8 System Management
System management includes:
Multi-languages features: The system provides multi-languages, such as English and Chinese. The default
is English.
NE topology: Provide the topology management according to different groups.
Users login/quit: Provide function for users login/quit management.
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For more information on EMS and detailed operating instructions, please refer to 《EMS User Operation Guide》
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9 Maintenance and Troubleshooting
9.1 Overview
If the equipment can’t work normally or the link is down after its installation, the phenomenon can be seen
as communication failures. Usually, not all the failures are caused by equipment itself. The maintenance
engineer should firstly rule out the communication interruption caused by other external factors according to
the fault phenomenon and restore communications quickly. If the fault is caused by the equipment, the
maintenance engineer should contact the vendor.
The failure source and key information are displayed on the LED in front panel; this can help the engineer to
determine the cause of malfunction and isolate the possible point of failure.
The common failures are as follows:
The E1 interface signal is vanished or the user data does not exist.
The antenna feeder is unconnected or inappropriate connected.
The power supply is improper.
There is serious obstruction in line-of-sight.
The equipment is not in correct work status
DMW-P system can be operated easily without a lot of complex preparatory work. Also, the fault can be
located quickly with the states of the LED indicators in the front panel. The following sections will give the
detailed correspondences between the states of the LED indicators and the typical states of various parts of
equipment. Alarm definition, alarm condition and alarm handling will be described in detail.
9.1.1 Maintenance Overview
Check power supply
Check connectors of cables
Check the Voltage range ±48V±20%
Check indicators
Check alarms of manage software
Check environment (temperature, humidity, etc.)
Maintain at least once a month
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9.1.2 Troubleshooting clearance
When the equipment breaks down, please do not disassemble the equipment without permission. You can
analyze reasons through the following steps:
Check through monitoring software and user manual (the flow chart of maintenance and
troubleshooting).
Check other link in the same way.
Find out the phenomenon of failure.
Find out the reason of failure.
If the user can carry out maintenance, please carry out it step by step under the guidance of experienced
technical staff.
9.1.3 Maintenance Notes
Maintenance must be carried out under the guidance of experienced technical staff.
When restarting equipment (cold start), wait 30 seconds to enter the normal operating status.
If the settings of parameters have been changed during the maintenance time, the original settings must
be restored after completing the repairs. If the equipment has been replaced, the configurations of the
new equipment must be the same as the original one.
9.2 Normal Working
When the DMW-P system works normally and the link is OK, the LED indicators on the front panel run
as following：
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Description：
1、Power supply is OK
2、IDU works normally.
3、ODU works normally.
4、Working without any alarms
5、Link is fine
6.AIS status
Status get from LCT：
1. Link is normal
2. BER is normal
3. SNZ is normal
4. No testing action
5. No signal loss
6. No alarms.
Status on the LCD：
1. BER is normal
2. E1 signal is normal
3. No testing action
The NE management with EMS is normal and there is no alarm information
9.3 Power Supply-type Malfunction
Failure in power supply may cause equipment power down, startup and working abnormally.
This problem can be judged obviously by checking the PWR indicator in maintenance.
It includes：
1. The power supply range is not correct. The power supply type must comply with the equipment.
2. The power cable is short or open.
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3. The power supply pin and on-off tangency is not good.
4. The fuse is bad.
5. There is a problem in the power supply module inside IDU.
Troubleshooting：
1. Check the power supply.
2. Check the connection of the both ends of the power cable.
3. Check that the power cable is short or open.
4. Check that the power supply type complies with the equipment..
5. Check that power supply range
6. Check that whether the on-off tangency and fuse are good..
7. Check that the grounding is good.
8. If the malfunction still exists, this may be a problem of the power supply module inside IDU that user
cannot fix. Please call our Technical Support.
9.4 Connection-type Malfunction
Connection-type malfunction includes：
1. Failure in E1 cable connection between IDU and external equipment may cause “E1 Signal LOS Alarm”.
2. Failure in IF cable connection between IDU and ODU may cause “IDU RX IF Too Low Alarm”.
3. Failure in protection cable connection between host IDU and standby IDU may cause switch failure.
4. Failure in cable connection between IDU and PC may cause LCT operation failure.
5. Failure in connection between IDU and server may cause EMS management failure.
Connection-type malfunction 1and 2 may cause corresponding alarm. But when the alarm occurred, it does
not mean that there is a problem of connection. So eliminate the connection-type malfunction first when solve
the alarm: check if the connection; try to replace the cable.
Dealing with the connection-type malfunction 4 (LCT no response):
1.Check that the cable is firm. One end is connected to PC and another end is connected to IDU LAN
interface.
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1. Try to connect to another LAN interface.
2. Try to replace the cable.
3. Check that the IP address of PC and IDU are in the same network segment and the gateway of PC is
correct.
4. Check that the IP address of IDU for LCT connection is correctly filled by user. If user does not
know the IP, find it on LCD.
5. Restart the IDU.
6. If the malfunction still exists, this may indicate a problem in the network module inside IDU that user
cannot fix. Please call our Technical Support.
Dealing with the connection-type malfunction 5 (EMS no response):
1. First, according to the network topology, locate the non-response region the non-response IDU
belongs to. The non-response region means the region which contains one or more non-response
IDUs.
2. Find out the nearest IDU of the region to the EMS server.
3. Go to the field and eliminate the power supply malfunction first.
4. If the IDU connects the nearest hop to se ver through a wireless link, check if there is an alarm at the
near end or far end. If there is, solve the alarm; if there is not, contact our Technical Support for
replacement (local or remote).
5. If the IDU connects the nearest hop to sever through a net wire, check the cable connection. Try to
replace the cable or the LAN interface.
6. Check that the static routing table is correctly configured.
7. Check that the static routing tables of all the IDUs using the routing function (called the router IDU)
on the link to the server are correctly configured.
7. Restart the IDU. If the malfunction still exists, this may be a problem of the network module inside
IDU that user cannot fix. Please call our Technical Support.
8. Check whether the next IDU of the non-response region is still non-response. Repeat steps 1 to 8 to
troubleshoot the non-response IDU until EMS can manage all the NEs in planning.
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9.5 Alarm-type Malfunction
9.5.1 Alarm List
Alarm Definition Severity Alarm Description
IDU RX IF Too Low Alarm Fatal The 70MHz IF signal from ODU to IDU is below the requirement so that IDU cannot do further signal processing.
IDU TX LO Unlock Alarm Fatal IDU transmitting channel has fault in Local Oscillator so that the modulation of the 310MHz IF signal cannot be completed.
IDU RX LO Unlock Alarm Fatal IDU receiving channel has fault in Local Oscillator so that the demodulation of the 70MHz IF signal cannot be completed.
ODU TX LO Unlock Alarm Fatal ODU transmitting channel has fault in Local Oscillator so that the up conversion from the 310MHz IF signal to the appropriate RF signal cannot be completed.
ODU RX LO Unlock Alarm Fatal ODU receiving channel has fault in Local Oscillator so that the down conversion from the RF signal to the 70MHz IF signal cannot be completed.
IDU Demodulator Asynchronous Alarm Error IDU demodulator has lost Frame Synchronization.
Serious Bit Error Rate Alarm Error The BER has exceeded user-defined threshold for consecutive seconds.
RSSI Too Low Alarm Error ODU received signal power level is below user-defined threshold.
ODU TX Power Fading Alarm Error
ODU transmitter power is lower than
Settings and the difference between them exceeds user-defined threshold.
E1 Signal LOS Alarm Warning One or more E1 port has no signal input.
IDU Temperature Too High Alarm Warning IDU temperature exceeds user-defined threshold.
ODU Temperature Too High Alarm Warning ODU temperature exceeds user-defined threshold.
External Output 1 Alarm User Defined
IDU sends alarm to external equipment through Output port 1.
External Output 2 Alarm User Defined
IDU sends alarm to external equipment through Output port 2.
External Input 1 Alarm User Defined
IDU receives alarm from external equipment through Input port 1.
External Input 2 Alarm User Defined
IDU receives alarm from external equipment through Input port 2.
Figure 9-1 Alarm List
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Notice：When an alarm occurred, a warning message will be reported once; when an alarm disappears, a
clearing message will be reported once. After the appearance of an alarm, the corresponding indicator lights
become bright; they go out after the elimination of the alarm.
9.5.2 Troubleshooting Alarms
9.5.2.1 Serious Bit Error Rate Alarm
For different situations, user can define the BER threshold into different levels. The default is 10e-6 that meet
the general requirement.
This alarm indicates that the BER has exceeded the BER threshold.
When this alarm occurred the AIS indicator turns light. When the alarm is cleared, the AIS indicator goes out.
Steps:
1. First check if there is a fatal alarm such as:
IDU RX LO Unlock Alarm
ODU TX LO Unlock Alarm
IDU RX IF Too Low Alarm
If one of those Alarms occurred solve that Alarm first.
2. Check if the BER user-defined threshold is reasonable.
3. Check that the RSSI is acceptable (-90dBm to -20dBm). If it is not, refer to Section 9.5.2.2,
Troubleshooting “RSSI Too Low Alarm”.
4. Check that the baseband Signal-to-noise Ratio is acceptable. If the SNR is below requirement and the RSSI
is normal, refer to step 6 for eliminating interference.
5. If it has dropped back below the BER threshold, note the time the alarm last. This may allow you to track
down the source of the fade if this alarm periodically appears. Some possible sources of fading could be
noise, interfering signals, temporary obstructions (such as someone standing directly in front of the
antenna), or the operation of a microwave oven in the vicinity.
6. If the BER continues to remain above the BER threshold, check the link for possible obstructions or
interference. Obstructions could be anything from new buildings or walls to growing trees or changes in the
landscape. For example, if a tree between the two antennas grows enough to block the Fresnel zone, the
BER will increase. Also, if that trees is removed, there could be multipath fading effects causing a problem.
To check for sources of interference, look for other similar systems in the area or use a spectrum analyzer to
detect the noise floor and any other signals in the vicinity of the antennas that are in or near the band. Note
the frequency, power, and direction of the interfering signal. This will be helpful in adjusting the antenna
direction or polarization to reduce the interference.
Specific procedures:
Align the antenna. Different from Section 6.3, this alignment is based on BER not RSSI.
The excursion of the antenna direction may reduce the received signal energy and link gain, which could
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cause error bit. In this condition the antenna should be readjusted for better received signal.
The steps as follows:
Loosen the antenna fixtures, then turn the antenna few angles (no more than ±5º) along the level
direction. The error tester should be observed every several minutes after the alignment. If the BER drops
down, rotate the antenna according with the original direction until the BER increases. Then reverse the
antenna to the position with lowest BER.
Use the same method to adjust the antenna’s pitch angel until getting the lowest BER.
Fix the antenna.
Antenna polarization
If the BER has not got better even though the antenna alignment, then the Antenna polarization can be
taken into account.
The steps of checking and adjusting antenna as follows:
Make sure the polarization direction of the two ends is the same. If not, adjust it to the same polarization.
If the result is not improved, then rotate the antenna 90° clockwise to another polarization .
polarization direction 1 polarization direction 2
BER
Choose larger size antenna
If all the above measures can not improve the received signal, then the larger size antenna should be
used.
The larger size antenna can not only increase the received gain but also reduce the external
electromagnetic interference.
The original size antenna larger size antenna
BER
7. Restart the system (both local and remote ends).
8. If the alarm still exists, this may be a problem on IDU or ODU that user cannot fix. Please call our
Technical Support.
9.5.2.2 RSSI Too Low Alarm
User can define RSSI threshold according with different BER levels. The default is -90dBm.
This alarm is caused by signal power received by the ODU that is less than threshold. When this alarm
occurred the ODU indicators turns light. When the alarm is cleared, the ODU indicators go out.
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Steps
1. Check that the RF parameters are configured properly. Check that ODUs of two ends are right matched.
Be sure one is high station, the other is low station. Check that the channel number of two ends is
identical. Otherwise it is impossible to establish a link. Check that PAs of two ODUs are unmated and
transmit maximum power.
2. Check if there is an “ODU TX Power Fading Alarm”, “IDU TX LO Unlock Alarm” or “ODU TX LO
Unlock Alarm” at the far end. If one of those alarms is set, debug that alarm first.
3. Make sure there is no E1 local loopback test at the far end.
4. Check if there is an identical alarm at the far end. If there is, check the link as follows.
5. Check that the antenna polarization of two ends is the same.
6. Check the antenna alignment. Make sure the antenna is aligned properly and that the RF cable is
connected correctly and not damaged. Do this for both sites of the link.
7. Check whether the weather conditions are too bad, such as heavy rain, snow, strong wind, etc.
8. Check that there is no obstruction in line-of-sight (LOS)
9. Following step 4,if there is no such alarm, the problem is in a single way from the far end to the near end.
Restart the IDU
10. If the alarm is solved it means that the antenna is blocked temporarily
11. If the alarm still exists, this may be a problem on ODU that user cannot fix. Please call our Technical
Support
9.5.2.3 ODU TX Power Fading Alarm
User can define the fading threshold of ODU Tx power. The default is 5 dBm.
This alarm indicates that the gap between setting and actual Tx power exceeds user-defined threshold.
When this alarm is set, the ODU indicators turn light. When the alarm is cleared, the ODU indicators go out.
Steps：
1. Check that the threshold is reasonable.
2. Check whether there is IDU Rx Lo Unlock alarm
3. Restart the IDU
4. If the alarm still exists, this may be a problem on ODU that user cannot fix. Please call our Technical
Support.
9.5.2.4 IDU TX LO Unlock Alarm
This alarm indicates that IDU Tx LO is unlocked.
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When this alarm is set, the IDU indicators turn light. When the alarm is cleared, the IDU indicators go out.
Steps：
a) Restart the IDU.
b) If the alarm still exists, this may be a problem on IDU that user cannot fix. Please call our Technical
Support.
9.5.2.5 IDU RX LO Unlock Alarm
This alarm indicates that IDU Rx LO is unlocked.
When this alarm is set, the IDU indicators turn light. When the alarm is cleared, the IDU indicators go out.
Steps：
1. Restart the IDU.
2. If the alarm still exists, this may be a problem on IDU that user cannot fix. Please call our Technical
Support.
9.5.2.6 ODU TX LO Unlock Alarm
This alarm indicates that ODU Tx LO is unlocked.
When this alarm is set, the ODU indicators turn light. When the alarm is cleared, the ODU indicators go out.
Steps：
a) Restart the IDU.
2. If the alarm still exists, this may be a problem on ODU that user cannot fix. Please call our Technical
Support.
9.5.2.7 ODU RX LO Unlock Alarm
This alarm indicates that ODU Rx LO is unlocked.
When this alarm is set, the ODU indicators turn light. When the alarm is cleared, the ODU indicators go out.
Steps：
1. Restart the IDU
2. If the alarm still exists, this may indicate be problem on ODU that user cannot fix. Please call our
Technical Support
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9.5.2.8 IDU RX IF Too Low Alarm
This alarm indicates that the 70MHz IF signal IDU received is too low.
When this alarm is set, the IDU indicators turn light. When the alarm is cleared, the IDU indicators go out.
Steps：
1. Check that IF cable is connected correctly. The connector is close and the end to ODU is well waterproof.
2. Check that the IF cable type and not exceed the maximum allowable length.
3. Try to replace the IF cable with same specifications.
4. Try to replace the IF cable with lower attenuation or a shorter one.
5. If the alarm still exists, this may be a problem on ODU or IDU that user cannot fix. Please call our
Technical Support.
Don’t connect and disconnect cables with the power on.
9.5.2.9 IDU Demodulator Asynchronous Alarm
This alarm indicates that IDU demodulator and IDU demodulator have lost Frame Synchronization. It may be
caused by serious BER or low RSSI.
When this alarm is set, the IDU indicators turn light. When the alarm is cleared, the IDU indicators go out.
Steps：
1. First check whether there is a “Serious Bit Error Rate Alarm”, “RSSI Too Low Alarm”, “IDU RX IF Too
Low Alarm” and other RF type alarms. If one of those Alarms is set, debug that Alarm first.
2. Check far end alarms.
3. Do E1 local loopback test at the far end to check the input data is synchronous.
4. Restart the IDU.
5. If the alarm still exists, this may indicate be problem on IDU that user cannot fix. Please call our
Technical Support.
9.5.2.10 IDU Temperature Too High Alarm
User can define temperature threshold according with the field environment. The default is 70.
This alarm indicates that the temperature detected by IDU itself exceeds the user-defined threshold.
When this alarm is set, the IDU indicators turn light. When the alarm is cleared, the IDU indicators go out.
Steps：
1. Check that the threshold is reasonable.
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2. Check that the indoor ambient temperature is acceptable.
3. Check that the IDU surface temperature is acceptable.
4. Shut down the IDU and cool down it for a period of time. Start the IDU.
5. If the alarm still exists, this may indicate be problem on IDU that user cannot fix. Please call our
Technical Support
9.5.2.11 ODU Temperature Too High Alarm
This alarm indicates that the temperature detected by ODU itself exceeds the default threshold.
When this alarm is set, the ODU indicators turn light. When the alarm is cleared, the ODU indicators go out.
Steps：
1. Check the outdoor temperature is acceptable and there is no heat source around.
2. Shut down the IDU and cool down it for a period of time. Start the IDU.
3. If the alarm still exists, this may be a problem on ODU that user cannot fix. Please call our Technical
Support.
9.5.2.12 E1 Signal LOS Alarm
This alarm indicates that one or more E1 port has no signal input.
When this alarm is set, E1 port state displayed by LCD is “LOS”. When the alarm is cleared, E1 port state
displayed by LCD is “NORMOL”.
Steps：
1. Check that there is E1 service in transmission. When no E1 service entries, this alarm does not mean
equipment failure.
2. Check the E1 cable and the connectors.
3. Try to replace E1 cable with same specifications. .
4. Restart the IDU.
5. If the alarm still exists, this may be a problem on IDU that user cannot fix. Please call our Technical
Support.
9.5.2.14 1+1 Switch failure alarm
This alarm indicate that there is problem of standby IDU
Steps：
1. Check whether there is BER alarm or other serious alarm
2 Restart the IDU
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3. If the alarm still exists, contact Technical Support.
。
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9.6Flow Chart of Maintenance And Troubleshooting
EMS Monitoring
Alarm Reporting Failing in
Connecting NE
Alarm Elimination?
Alarm Recording
Yes
Fieldwork
No
Maintenance
Power Supply OK？
Power Supply-type
MalfunctionLocation
No
View LED and LCD
Power Supply-type
MalfunctionTroubleshooting
Yes
Alarm Indicatorexisting?
Alarm Reported by EMS
Alarm Location
Yes
Alarm Troubleshooting
Comparing
No
Connecting LCT OK?
LCT Connection-type
MalfunctionLocation
No
Performance Log
LCT Connection-type
MalfunctionTroubleshooting
Yes
Connecting Server OK?
EMS Connection-type
MalfunctionLocation
EMS Connection-type
MalfunctionTroubleshooting
End
No
Yes
Further Analysis
Figure 9-1 Flow Chart of Troubleshooting
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10 Technical Data
10.1 Description
Item 15GHz
Frequency Range (GHz) 14.5- 15.35
Tx/Rx Spacing(MHz) 315/420/490/644/728
Flange Type UBR140
Transmitter
Band(GHz) 15GHz
Output Power (dBm) +20
Power Control Range Min to 20 dB, 1dB step
Tx Power Tolerance +/-2dB
Frequency Stability ±5 ppm
Modulation Mode QPSK
Channel Separation
7MHz at 8Mbps, 14MHz at 16Mbps, 28MHz at 34Mbps
Receiver
Band(GHz) 15GHz
BER 10-6 threshold (dBm)
8Mbps -85
16Mbps -82
BER 10-3 threshold(dBm)
8Mbps -88
16Mbps -85
Frequency Stability ±5 ppm
Max output level 0dBm
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IDU to ODU
IF cable length ≤300m
IF signal -48VDC to ODU，IDU to ODU IF 310MHz, ODU to IDU IF70MHz,
Rx level RSL testing range -40 to -90 dBm
interface
E1 ITU-T G.703ITU-TG.823,75Ω unbalance or 120Ω balance, DB44, HDB3
NMS
SNMP control Ethernet RJ-45
Power supply
voltage +/-(36-72)Vdc/+/-(18-72)Vdc
polarity Positive or Negative
IDU&ODU (1+0) Consume
power
< 40w
IDU (1+1) power
consumption <19w
weight
ODU <7kg
IDU (1+0) <4 kg
Operation environment
temperature IDU: -10~+50, ODU:-40 to +55°C
humidity IDU: 0 to 90%, non-condensing; ODU: 0 to 100%,
altitude ≤5000m
Figure 10-1 system parameter
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10.2 Mechanical Dimension
10.2.1IDU Mechanical Dimension
Figure 10-1 IDU Mechanical Dimension
10.2.2 ODU Mechanical Dimension
volume(h*w*d)[mm] 285x285x150 285x285x150
weight[kg] <7kg
Figure 10-2 ODU IDU Mechanical Dimension
10.3 Power Supply
The power consumption of single station (IDU+ODU) is about 35W,. Each IDU supply power with its
corresponding ODU, single station supply +/- (36~72) VDC, no polarity difference, either “+”or “-”can be used
as power supply.
Any type of DC could be used when meeting the above requirement.
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10.4 Pin Outs
RJ-45 interface pin outs:
Figure10-3 RJ45 interface
DB44 pin outs (120ohm)
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Figure 10-4 E1 pair
E1 cable Line Sequence
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HDB3_IN0+
HDB3_OUT0+
HDB3_IN1+
HDB3_OUT1+
HDB3_IN2+
HDB3_OUT2+
HDB3_IN3+
HDB3_OUT3+
HDB3_IN0-
HDB3_OUT0-
HDB3_IN1-
HDB3_OUT1-
HDB3_IN2-
HDB3_OUT2-
HDB3_IN3-
HDB3_OUT3-
d42d28d13d43d29d14d44d30d15
d39d25d10d40d26d11d41d27d12
d36d22d7d37d23d8d38d24d9
d33d19d4d34d20d5d35d21d6
d16d1d31d17d2d32d18d3
J1
DB44
Figure 10-5 E1 cable Line Sequence
DB9 Groove interface pin define：
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DB9
output0 Output1 Output2 Output3 GND
PIN 1、2 3、4 6、7 8、9 5
10.5 Environment Requirement
DMW-P equipment match sub-network ETS300019external telecommunication service standard, including English broadcasting station 300 198 standards. IDU Temperature： -10to+50 ; humidity less than 90%(no dew) sun radiate more than700W/m2 ; wind speed more than5m/s（18km/h） 。 ODU: temperature -33to+55 ; humidity 0-100 ％ ; Sun radiate to1200W/m2; wind speed more than50m/s
Appendix A IDU Default parameter
Parameter Default IP address 192.168.12.162 WAN IP address 192.168.13.1 1+1 protection IDU IP 192.168.12.3 Server IP 192.168.12.161 RSSI Threshold -90dBm IDU temperature threshold 70 Tx Power fade threshold 5dBm BER threshold 10E-6 1+1protection mode 1+0 Master/standby Standby 1+1 switch Auto
TableA-1 IDU Default parameter
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Appendix B Antenna accessories
1
4 5 6 7 8 9
10
1112
2
18
3
19
17
20
16
15
1314
FigureB-1 Antenna accessory
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Table B-1 Antenna accessories
Appendix C Pole accessory
FigureC-1 Pole accessory
NO. item number remark
1 Pole 1 2 Mantle 1 3 enclose 1
4 reflecting surface 1
5 carriage 1
6 feed 1 7 ramp 1 8 M10X30 bolt 3
9 pitching adjustment pole 2
10 M10X45 bolt 1 11 horizontal adjustment pole 1 12 E material 1
13 platen 2
14 M10X125 screw 4
15 M10 nut 4 16 Ø10 washer 15
17 Ø10 spring washer 14
18 bone pattern material 1
19 M10X30 bolt 3
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NO. number Item and description
1 8 M14X210 screw
2 16 sets M14 nut、spring washer、plain washer
3 2 transverse slot steel
4 2 transverse slot steel weld A、B（one is long、one is short）
