ODU-CHP Presentation Edition2

a leading

telecommunications

Solutions Partner

April, 2008

IDRIDR--C TrainingC Training

Agenda of 3rd Day

§ IDR-C / ISR Outdoor Units Installation

§ ATPC Settings according to Path Link Calculation

§ Tx Switching Criteria

§ Practice

§ Summing Up

§ End of Course

IDR-C / ISROutdoor Units Installation

ODUODU--CHPCHP

Appearance

ODU grounding point5

Clamps for the ODU mountingonto the antenna4

ODU waveguide port3

Receptacle for themeasurement of the RSSI level2

Receptacle for the connectionof the IF cable that connectsthe ODU to the IDU

1

DescriptionNumber

4

5

6,8 kg455 mm x 305 mm x 185 mm

Integrated couplerfor 7 GHz, 8 GHz

(the whole assembly of themetallic base and the

coupler)

3,8 kg360 mm x 240 mm x 240 mm

Integrated couplerfor 13 GHz to 38 GHz

(the whole assembly of themetallic base and the

coupler)

4 kg237 mm x 247 mm x 89 mmODU for 13 GHz to 38 GHz

6 kg250 mm x 247 mm x 106 mmODU for 7 GHz, 8 GHz

Weight (max) *DimensionsItem

* The weights may vary depending on the frequency.

Dimensions and Weights

Consumptions

23,5182338

21,515

2613

347,18,1

ODU Consumption (W, typ.)Band (GHz)

The ODU is composed of the following subunits (cards):

• Cable Interface Unit

• IF Processing Unit

• Transceiver Unit

• Diplexer Unit

• Power Supply Unit

Subunits

Block Diagram

N_con(IDU)

DEMOD(ASK)

MOD(ASK)

350MHz(IF_PR)

140MHz(IF_PR)

CtrlRS232(IF_PR)

CIF UNIT

6 MHz

10.7MHz

Lightningprotection

VOLTAGES+12V-12V+6.5VGND

- 48 Vdc(PSU)

MAINCONVERTER

PSU UNIT- 48 Vdc(CIF)

CONVERTER

+12V

-12V

+9V

+6.5V

DIPLEXERUNIT

Flange Tx

Flange Rx

Phasematching

Ant Flange

IF_Rx(TxRx)

140MHz(CIF)

attn ctrl (PIC)

AGC

S y n t hTCXO

IF PR.DOWN-CONVERTER

IF PR.UP-CONVERTER

Synth TCXO

IntegraVdet (TxRx)

IF_Tx(TxRx)

350MHz (CIF)

AGC

Progr.(PIC)

Progr.(PIC)

Fract.Synth

DDSTCXO

FRACTIONALSYNTHESIZER

Progr(PIC)

Synth

VCO LB(TxRx)

TCXO

LOOP BACKSYNTH.

VOLTAGES+12V-12V+9V+6.5VGND

PIC (microcontroller)CONTROLS:PWR, MUTE, LoopBack, Rx attnPROGRAMMING:Channel (Synthesizers)INFO:PWR, RSSI, temp, voltages, …ALMS:PWR, RSSI, Synthesizer Lock

VCO_Fract.(TxRx)

PWR ctrl (PIC)

IF_PR UNIT

VCO LB(IF_PR)

VOLTAGES+12V-12V+9V+6.5VGND

VCO_Fract.(IF_PR)

X4X2

MULTIPLIER

Vdet(IF_PR)

WG transition Tx

MUTE(IF_PR)

IF_Tx(IF_PR)

UP CONVERTER/ PA

WG transition RxIF_Rx (IF_PR)

LNA/ DOWN CONVERTER

TxRx UNIT

Red color: dc connectionBlue color: communication connectionGreen color: RF connectionLight Green color: RF connection physical (flanges attached)

tor

The Cable Interface Unit distinguishes and processes the following signals transferredthrough the coaxial cable connecting the IDU to the ODU:

• -48 Vdc supplied by the IDU. The voltage is then forwarded to the ODU PSU Unit.

• 350MHz modulated signal (16QAM/ QPSK) carrying payload and service channels.The signal is supplied by the IDU and fed to the ODU IF Processing Unit.

• 140MHz modulated signal (16QAM/ QPSK) carrying payload and service channels.The signal is supplied by the IF Processing Unit and fed to the IDU.

• 6 MHz modulated signal (ASK) carrying control signals. The modulated signal issupplied by the IDU, is demodulated and derived controls are fed to the ODU IFProcessing Unit (PIC microcontroller).

• 10,7 MHz modulated signal (ASK) carrying control signals. The controls are suppliedby the IF Processing Unit (PIC microcontroller), are modulated and fed to the IDU.

Cable Interface Unit

The IF Processing Unit is composed of the following subunits:

• Up-ConverterThe up-Converter accepts the 350MHz modulated signal (16QAM/ QPSK) from the Cable Interface Unit.The signal is adjusted to a constant level, up converted (filtered and amplified) to IF_Tx frequency and fedto the ODU Transceiver Unit. The IF_Tx MHz level is adjusted from an AGC loop (according to PICcontrol and PA feedback - Vdet) in order to reach the output power target value.

• Down-ConverterThe down-Converter accepts the IF_Rx MHz modulated signal supplied by the ODU Transceiver Unit.The signal is amplified, filtered and down- converted to 140 MHz. The 140 MHz signal is adjusted to aconstant level and fed to the ODU Cable Interface Unit.

• DDS - Fractional SynthesizerThe PLL is based on a fractional synthesizer locked to a reference signal produced by the DDS circuit.The Microwave Local Oscillator (VCO Fract.) signal derived is fed to the ODU Transceiver Unit formultiplication.

• Loop Back SynthesizerA PLL is used to provide the Local Oscillator required for the conversion of Microwave Tx channel to ofMicrowave Rx channel.This signal (VCO LB) is corresponding to duplex (Tx-to-Rx) spacing and is fed to the Transceiver Unit. Itis activated for test purposes only.

• PIC MicrocontrollerThe PIC Microcontroller controls the ODU and informs the IDU of the ODU status.

IF Processing Unit

The Transceiver Unit is composed of the following subunits:

• Up-ConverterThe up-Converter accepts the IF_Tx MHz signal (modulated signal supplied by the ODU IF ProcessingUnit). The signal is up-converted to the final Microwave Transmitted signal, filtered and amplified. TheMicrowave signal is detected and the corresponding dc level (Vdet) is fed back to the IF Processing Unitin order to close the PWR control loop. The signal is filtered-out for harmonic elimination and fed to theDiplexer Tx port.

• Down-ConverterThe down-Converter accepts the received Microwave signal (supplied by the Diplexer Rx port). Thesignal is amplified (LNA), filtered (image rejection) and then down-converted. The resulted signal, IF_Rx,is fed to the IF Processing Unit for further process.

• MultiplierThe Microwave Local Oscillator (VCO Fract. supplied by the IF Processing Unit) is multiplied by aspecific factor (4 or 8 depending on the system), filtered, amplified and then equally split in two paths.The two signals drive the two double balanced mixers for up & down conversion respectively.

• Loop BackThe Loop Back Local Oscillator (VCO_LB corresponding to duplex spacing and supplied by the IFProcessing Unit) drives a balanced mixer and converts the Microwave Tx channel to of Microwave Rx.This action is activated for test purposes only in order to independently check each site of the link.

Transceiver Unit

Power Supply Unit, Diplexer Unit

The Power Supply Unit accepts the -48 Vdc voltage provided by the IDU (through theODU Cable Interface Unit) and converts it to the voltages needed for all circuit operation(+12V, -12V, +9V, +6.5V).

The main function of the Diplexer is to distinguish the transmitted and receivedchannels providing adequate isolation.

Recommended Types of IF Cables

The IF cable is used to connect the ODU to the IDU.

Photo

4,2 dB / 100 m at 350 MHz

8,1 dB / 100 m at 350 MHz

Nominal Attenuation

LCF12-50 (1/2”)D = 200 m to 300 m

LCF14-50 (1/4”)D < 200 m

Type of coaxialcable

Distance betweenIDU & ODU

Necessary Tools for the IF Cable Preparation

For LCF 14 - 50 (1/4”) Cable For LCF 12 - 50 (1/2”) Cable

RFS TRIM-12-1BN 541317

19 mm21 mm

Accessories for the IF Cable Preparation

For LCF 14 - 50 (1/4”) Cable For LCF 12 - 50 (1/2”) Cable

NOTE The manufacturer provides a pair of N-type connectors,one straight N-type connector and one right-angle N-type connector.Recommended is the use of the right-angle connector at the end of the cablescrewed onto the ODU.

Preparing the ¼” IF Cable

1. Use a coping saw to cut the cable end.

2. Use a blade to remove ~21 mm of cablejacket.

Preparing the ¼” IF Cable, Continued

3. Insert the cable into the trimming tool sothat the edge of the jacket lies in the colletshown with the arrow.

4. Rotate the trimming tool in the directionof the arrow engraved on the tool withoutapplying force greater than the trimmingtool spring tension. Stop rotating when thetool rotates freely.


5. Remove the trimmed outerconductor. Cut and completelyscrape away the foam from the innerconductor taking care not to damagethe copper clad finishing.

6. Use a blade to remove ~17 mm ofcable jacket up to the score createdby the trimming tool in step 4.


7. Use a coping saw to cut the innerconductor leaving a length of ~8 mm.

8. Use a file to smooth the edge of theinner conductor. Then insert it in theappropriate hole of the trimming tooland rotate it to completely smooth theedge.


9. Slide the heat shrink boot and thethick O-ring over the cable. Then pushthe back nut of the connector onto thecable and over the O-ring applying aforce-full push to lock into place. Pullto check if locked.

The end of the cable should resemble the photo below:


10. Insert the cable into the appropriate hole of the trimming tool, hold theconnector back nut firmly and rotate the cable so that the protruding pin (arrow 1)of the trimming tool flares the outer conductor. The flared diameter should be up to7,8 mm.

NOTEEnsure that theprotruding pin isinserted between theouter conductor andthe foam (arrow 2)otherwise it willdamage the outerconductor instead offlaring it.


11. Place the body of the connector over theback nut of the connector and screw intoplace.

12. Use the 13 mm and 14 mm wrenches (only)to tighten the back nut and body of theconnector in an opposite manner as shown inthe photo.


13. Slide the heat shrink boot into place overthe connector body. Use a heat gun or applya flame (130 ºC max.) to shrink the bootforming a weatherproof seal.

14. Repeat the whole procedure for the otherend of the cable.

Preparing the ½” IF Cable

1. Use a coping saw to cut the cable end.


Preparing the ½” IF Cable, Continued

3. Insert the cable into the trimming tool sothat the edge of the jacket lies in the colletshown with the arrow.

4. Hold the cable firmly and rotate thetrimming tool in the direction of the arrowengraved on the tool without applying forcegreater than the trimming tool springtension. Stop rotating when the tool rotatesfreely.

5. Remove the trimmed outer conductor.Cut and completely scrape away the foamfrom the inner conductor taking care not todamage the copper clad finishing.


6. Use a coping saw to cut the innerconductor leaving a length of ~11 mm andthen use a blade to remove ~24 mm of cablejacket up to the score created by thetrimming tool in step 4.

7. Use a file to smooth the edge of theinner conductor. Then insert it in theappropriate hole of the trimming tooland rotate it to completely smooth theedge.



8. Push the back nut of the connectoronto the cable applying a force-fullpush to lock into place. Pull to checkif locked.

The end of the cable should resemble the photo below:


9. Insert the cable into the appropriate hole of the trimming tool, hold theconnector back nut firmly and rotate the cable so that the protruding pin (arrow 1)of the trimming tool flares the outer conductor. The flared diameter should be upto 14,5 mm.

NOTEEnsure that theprotruding pin isinserted between theouter conductor andthe foam (arrow 2)otherwise it willdamage the outerconductor instead offlaring it.


10. Place the body of the connector over theback nut of the connector and screw intoplace.

11. Use the 19 mm and 21 mm wrenches totighten the back nut and body of theconnector in an opposite manner as shown inthe photo.

12. Seal the opening between the back nutand the cable jacket with insulating tape.Wrap the tape repeatedly around the cable.Then squeeze the paste tube provided into thecharging hole to fill with paste. When thepaste begins to discharge from the vent hole(a second smaller hole), seal the vent holewith the insulating tape as well. Resumesqueezing the tube until there is a constantdischarge of the paste from the pierced holesin the tape.


13. Remove the paste tube and screw thecover to seal the charging hole. Removeexcess paste from the cable jacket.

14. Repeat the whole procedure for the otherend of the cable.

ODU Grounding Cable for connection to the tower/mast

The cable is used for the ODU grounding when attached onto the antenna or onto themounting kit.

1cm 1cm

M4 terminal ringscrewed onto the ODU

M8 terminal ringprovided (for connection

to the tower/mast)

Coupler Grounding Cable for connection to the tower/mast

The cable is used for the Coupler grounding. The ODUs grounding points are connectedto two grounding points on the coupler through short grounding cables and then thecoupler is grounded through the cable shown on next slide.

1cm 1cm

M6 terminal ring screwedonto the Coupler

M8 terminal ring provided(for connection to the

tower / mast)

Grounding Cables Photos

ODU grounding cablewhen attached ontothe antenna or ontothe mounting kit

ODUsgroundingcables whenODUs mountedonto the coupler

Coupler grounding

Installing and grounding one ODU onto the Antenna

When the antenna diameter is 1 ft, 2 ft, 4 ft or 6 ft, you can attach the OutdoorUnit onto the antenna directly, thus avoiding the waveguide expense. This isthe case of an integrated antenna.

NOTE Integrated antennas can be provided only by INTRACOM.

Installing and grounding one ODU onto the Antenna , Continued

• The maximum distance between the ODU and the IDU should not exceed 300 m.

• Decide if you will first install the antenna on the mast and then attach the ODU onthe antenna or if you will first attach the ODU on the antenna and then install theODU-antenna assembly on the mast.

• You should have prepared the IF cable and the ODU grounding cable beforeproceeding to the ODU installation.

Prerequisites

Installing and grounding one ODU onto the Antenna, Continued

Only trained and qualified personnel should installor replace this equipment.

1. Connect the grounding cable to theODU using the two asteroid M4 groversand the M4 screw.


2. Set the antenna polarization according to the antenna manufacturer’s instructions.

3. Apply the greasing paste (provided) onthe antenna feeder O-ring and then placethe O-ring on the antenna feeder groove.

4. If the ODU clamps are closed, unlock andopen them.


5. Hold the ODU in the right way taking into consideration the antenna polarization.

Vertical Polarization Horizontal Polarization


6. Hold the ODU clamps as shown in the photo.

7. Mount the ODU onto the antenna.


8. First close the two diagonal clamps andthen the other two clamps to secure theODU in place.


PLUGGING / UNPLUGGING THE IF COAXIAL CABLENever plug or unplug the IF coaxial cable to or from theoutdoor transceiver boxes when the respective indoorequipment is powered on and operating.There is risk of equipment failure and/or electrical shock, asthe IF cable carries the outdoor transceiver’s DC operatingvoltage (48 V).

9. Screw the right-angle connector of the IFcable onto the ODU N-type connector.


10. Use Butyl sealing compound, selfbonding rubber tape and insulating tapeto insulate the RF cable N-type connectorif required by climatic conditions.

11. To ground the ODU, connect the bared lug of the ODU grounding cable to thegrounding contact point on the tower or the mast.

Installing and grounding one or two ODUs onto the Mounting Kit

ODUs Mounting Kitwith a pair of U-bolts

• The maximum distance between the ODU(s) and the IDU should not exceed300 m.

• You should have prepared the IF cable(s) and the ODU grounding cable(s)before proceeding to the ODU(s) installation.

Prerequisites

Installing and grounding one or two ODUs onto the Mounting Kit, Continued

Only trained and qualified personnel should installor replace this equipment.

1. Connect the grounding cable(s) to theODU(s) using the two asteroid M4 groversand the M4 screw.


3. Mount the kit onto the mastwith the U-bolts. Use a 17 mmwrench to tighten the nuts.


4. Mount the ODU(s) onto themounting kit and close theclamps to secure in place.


PLUGGING / UNPLUGGING THE IF COAXIAL CABLENever plug or unplug the IF coaxial cable to or from theoutdoor transceiver boxes when the respective indoorequipment is powered on and operating.There is risk of equipment failure and/or electrical shock, asthe IF cable carries the outdoor transceiver’s DC operatingvoltage (48 V).

5. Screw the right-angle connector(s) of theIF cable(s) onto the ODU N-typeconnector(s).


6. With an hexagonal key apply 4,5 Nmtorque to screw the waveguide PBR flange(i.e. the flange with the O-ring) onto theODU waveguide port using four Allenscrews of the set provided.

7. With an hexagonal key apply 4,5 Nmtorque to screw the UBR flange of thewaveguide onto the antenna feederaccording to the antenna polarization.

Avoid making any sharp or small radius bends on the flexible andtwistable waveguides!Twisting or bending the waveguide beyond a certain limit couldcause permanent damage to the waveguide (hearing ascratching/stretching noise from the inside wire frame of thewaveguide indicates you have crossed the limit).


8. Use a spinner to attach the waveguideclamp kit on the mast applying 6 Nmtorque.

9. Use Butyl sealing compound, selfbonding rubber tape and insulating tapeto insulate the RF cable N-type connectorif required by climatic conditions.

10. To ground the ODU, connect thebared lug of the ODU grounding cable tothe grounding contact point on the toweror the mast.

11. Repeat for the second ODU if existing.

Integrated Coupler

The selection of the Couplerdepends on the frequency bandand the attenuation at its ports.

Integrated Coupler, Continued

1. Handle

2. Waveguide port forconnection to the one ODU(other ODU connected onthe opposite side of thecoupler)

3. Waveguide port forconnection to the antennaeither directly or throughwaveguide

4. Four hooks for ODUmounting onto the coupler(the clamps for mountingthe other ODU are found onthe opposite side of thecoupler)

5. Clamps for the couplermounting onto the antenna

6. Port marker

7. ODUs grounding cables


Port 2

Port 1

Asymmetric CouplerSymmetric Coupler

Port 2 is always the portwith the greaterattenuation and shouldbe used for ODU Bconnection!


1

1

2

1. ODUs grounding cables(for connection to theODUs grounding points)

2. Coupler grounding point(for connection to thetower/ mast groundingpoint)

NOTEThe ODUs grounding isachieved through the couplergrounding.

NOTEThe lug screwed onto thecoupler will be used for thetermination of the couplergrounding cable.


Use the integrated coupler (with two ODUs mounted) when you want to ensure hotstandby (asymmetric coupler) or frequency diversity (symmetric coupler) operationmodes and you have only one antenna. You can attach the integrated coupler ontothe antenna when you have the ODU frequencies and antenna diameters of the tablebelow, otherwise connect the integrated coupler to the antenna through awaveguide.

0,3 m (1 ft)0,6 m (2 ft)

23 GHz38 GHz

0,3 m (1 ft)0,6 m (2 ft)1,2 m (4 ft)1,8 m (6 ft)

13 GHz15 GHz18 GHz

Antenna DiameterODU Frequency


The kit is used for the coupler mounting in case of a non-integrated antenna. Thissolution should be implemented in the following two cases:• When you have the ODU version for 7 GHz, 8 GHz frequency, no matter what theantenna diameter is.• When you have an antenna with diameter equal or greater than 2,4 m (8 ft).

Two types of Coupler Mounting Kits: for 7/8 GHz and for 13 to 38 GHz

Coupler Mounting Kit


If you need to remove an ODU from the coupler, you must affix acover onto the unused coupler feeder to avoid the appearance ofstanding waves and humidity penetration.

1. Affix the cover so that the dowel isinserted in the specific hole.

2. Place the O-ring screw into thehole and secure the cover with thetwo hexagon socket-type screwsprovided (on the rim).

NOTE To remove the cover and re-attach the ODU, undo all three screws.

Installing and grounding two ODUs onto the Coupler

• The maximum distance between the ODUs and the IDU should not exceed 300 m.

• Decide if you will first install the coupler on the mast or the antenna and thenattach the ODUs on the coupler or if you will first attach the ODUs on the couplerand then install the ODUs-coupler assembly on the mast or the antenna.

• Two people are needed for mounting the coupler on the mast or the antenna. Ifthat’s not possible, pass a rope through the coupler handle and hang the coupler(or the coupler-ODUs assembly) from a fixed higher point to ensure safety duringthe installation!

• You should have prepared the IF cable(s) and the coupler grounding cable beforeproceeding to the ODU installation.

• In case you use a waveguide to connect the coupler to the antenna, take intoconsideration the length of the waveguide you have when deciding on the couplerposition on the mast.

Prerequisites

Installing and grounding two ODUs onto the Coupler, Continued

Case: Coupler detached from antenna

1. Set the antenna polarization according to the antenna manufacturer’sinstructions.

2. Unscrew the two short groundingcables from the coupler and connectthem to each ODU using the twoasteroid M4 grovers and the M4 screw.



3. Use a cross-headed (Philips) screwdriver andremove the antenna adaptor from the coupler.

4. Mount the mounting kit onto the coupler andpass through the kit the appropriate hoseclamps according to the mast diameter.



5. Apply the greasing paste (provided) onthe O-ring of he coupler waveguide input.

6. If the ODU clamps are closed, unlockand open them.



7. Fit the ODU waveguide port on thecoupler waveguide port to mount the ODUonto the coupler taking into considerationthe marking of the coupler port. First closethe two diagonal clamps and then the othertwo clamps to secure the ODU in place.

8. Repeat for the other ODU.

NOTE When you have an asymmetric coupler with different attenuation at each port, youmust take into consideration the marking of the port when attaching the ODU. Port2 is always the port with the greater attenuation and should be used for ODU Bconnection.



9. Connect the ODUs short grounding cablesto any two of the four grounding points onthe coupler using two asteroid M4 groversand a M4 screw for each cable.



10. Use a spinner to mount thecoupler on the mast applying5 to 6 Nm tightening torque.



11. With an hexagonal key apply4,5 Nm torque to screw thewaveguide PBR flange (i.e. theflange with the O-ring) onto thecoupler antenna port using fourAllen screws of the set provided.

Avoid making any sharp or small radius bends on the flexible andtwistable waveguides!Twisting or bending the waveguide beyond a certain limit could causepermanent damage to the waveguide (hearing a scratching/stretchingnoise from the inside wire frame of the waveguide indicates you havecrossed the limit).



12. With an hexagonal key apply 4,5 Nmtorque to screw the waveguide UBR flangeonto the antenna feeder according to theantenna polarization.



13. Use a spinner to attach the waveguideclamp kit on the mast applying 6 Nmtorque.



14. Connect the groundingcable to the coupler.



15. Screw the IF cables onto the ODUsN-type connectors.

PLUGGING / UNPLUGGING THE IF COAXIAL CABLENever plug or unplug the IF coaxial cable to or from the outdoortransceiver boxes when the respective indoor equipment is poweredon and operating.There is risk of equipment failure and/or electrical shock, as the IFcable carries the outdoor transceiver’s DC operating voltage(48 V).



16. Use Butyl sealing compound, selfbonding rubber tape and insulating tape toinsulate the RF cable N-type connectors ifrequired by climatic conditions.

17. To ground the coupler, connect the bared lug of the coupler grounding cable tothe grounding contact point on the tower or the mast.


Case: Coupler attached onto antenna

NOTEBefore proceeding to the procedure described hereinafter, make surethe antenna adaptor has not been removed from the coupler.



1. Set the antenna polarization according to the antenna manufacturer’sinstructions.

2. Apply the greasing paste (provided) onthe antenna feeder O-ring and then place theO-ring on the antenna feeder groove.

3. Connect the grounding cable to eachODU using the two asteroid M4 grovers andthe M4 screw.



4. Mount the two ODUs onto the coupler as already described.



5. Hold the ODUs-coupler assembly in the right way taking into considerationthe antenna polarization.



6. Fit the coupler waveguide port onto theantenna waveguide port.

7. First close the two diagonal clamps and thenthe other two clamps to secure the integratedcoupler in place.

8.Connect the IF cables to the ODUs andground the coupler as already described.

IF Cable Grounding

INDOOR EQUIPMENTSHELTER

Top Ground

50 m

50 mBottom Ground

Entrance Ground

Ground at Mid-point

Lightning Rod

Burried Ground Rods

ODU + ANTENNA

You arerecommended toground the IF cablealong the vertical run(every 50 m), near thetop and bottom and atthe entrance of thecable into theequipment shelter.

7200 m < D < 300 m

5100 m < D < 200 m

3D < 100 m

Number of Grounding KitsDistance between IDU & ODU

IF Cable Grounding, Continued

Example of Full Kit in case the IF cable is the LCF14-50 ¼” and the distancebetween IDU-ODU is greater than 100 m and less than 200 m

NOTE

1. N-type connector forconnection to the tailcable *

2. N-type R/A connectorfor connection to theODU *

3. Grounding kits *4. Screws etc. for

connection of thegrounding kits to thetower

5. Plastic bag forcovering andprotecting the free IFcable ends until theyare used

6. Labels for labelling theIF cables close the IDUand ODU

7. Cable ties for IF cablefastening to the tower

Two kits required for 1+1 configuration

* Can also be provided in separate


NOTE The grounding kit for the LCF12-50 IF cable differs from the onefor the LCF14-50 IF cable.

Install the grounding kit only where the cable runs straight.



2. Position the cable properly into thegrounding clamp.

3. Use an hexagonal key to screw the clamp.The cable should resemble the following photobelow:

4. Connect the bared lug of the grounding cable tothe grounding contact point of the tower or themast making sure the grounding cable runsvertically down to the tower/mast groundingcontact point to avoid cable strain under extremeweather conditions.

ATPC Settings according toPath Link Calculation

Topographic Diagram

Path Profile

Ιουλ 30 07

Site 1Latitude 55 45 00.00 NLongitude 037 37 00.00 EAzimuth 0.72°Elevation 157 m ASLAntenna CL 30.0 m AGL

Site 2Latitude 55 57 40.00 NLongitude 037 37 16.95 EAzimuth 180.72°Elevation 209 m ASLAntenna CL 75.0 m AGL

Frequency (MHz) = 13000.0K = 1.33

%F1 = 100.00

Path length (23.51 km)0 2 4 6 8 10 12 14 16 18 20 22

Ele

vatio

n (m

)

120

140

160

180

200

220

240

260

280

300

Assumptions

Link budget calculation has been carried out according to ITU-R Rec. P.530-7/8 using thefollowing propagation parameters:

Clat, Clon (dB) 2.86, 3.0

pL (%) 2

Type of terrain Inland with Co = 0 dBr

Path inclination (mrad) 4.14

ITU Rain climatic Zone(ITU-R Rec. P.837)

E (rain intensity > 22 mm/h for0.01% of the time)

Interference analysis No interference degradation hasbeen taken into account.

Site 1 Site 2

Elevation (m) 157.00 209.32Latitude 55 45 00.00 N 55 57 40.00 N

Longitude 037 37 00.00 E 037 37 16.95 ETrue azimuth (°) 0.72 180.72Vertical angle (°) 0.16 -0.32

Antenna model SB2-127B SB2-127BAntenna height (m) 30.00 75.00Antenna gain (dBi) 36.70 36.70

Frequency (MHz) 13000.00Polarization Vertical

Path length (km) 23.51Free space loss (dB) 142.17

Atmospheric absorption loss (dB) 0.48Field margin (dB) 1.00

Net path loss (dB) 70.25 70.25

Radio model IDR_13CHP_128QAM_STM1_2 IDR_13CHP_128QAM_STM1_2TX power (watts) 0.06 0.06TX power (dBm) 18.00 18.00

EIRP (dBm) 54.70 54.70RX threshold criteria BER SES BER SES

RX threshold level (dBm) -71.00 -71.00

RX signal (dBm) -52.25 -52.25Thermal fade margin (dB) 18.75 18.75

Geoclimatic factor 5.37E-06Path inclination (mr) 4.14

Fade occurrence factor (Po) 4.59E-03Average annual temperature (°C) 10.00

Worst month - multipath (%) 99.99384 99.99384(sec) 161.78 161.78

Annual - multipath (%) 99.99846 99.99846(sec) 485.34 485.34

(% - sec) 99.99692 - 970.68

0.01% rain rate (mm/hr) 22.00Flat fade margin - rain (dB) 18.75

Rain attenuation (dB) 18.75Annual rain (%-sec) 99.99851 - 468.89

Annual multipath + rain (%-sec) 99.99544 - 1439.57

Δευ, Ιουλ 30 2007Site 1-Site 2.pl4Reliability Method - ITU-R P.530-7/8Rain - ITU-R P530-7

Link Budget / V-pol

128QAM,STM-1

Site 1 Site 2


Longitude 037 37 00.00 E 037 37 16.95 ETrue azimuth (°) 0.72 180.72Vertical angle (°) 0.16 -0.32


Frequency (MHz) 13000.00Polarization Horizontal




Radio model IDR_13CHP_128QAM_STM1_2 IDR_13CHP_128QAM_STM1_2TX power (watts) 0.06 0.06TX power (dBm) 18.00 18.00








(% - sec) 99.99692 - 970.68




Δευ, Ιουλ 30 2007Site 1-Site 2.pl4Reliability Method - ITU-R P.530-7/8Rain - ITU-R P530-7

Link Budget / H-pol

128QAM,STM-1

Link Budget / V-pol

16QAM,16 x E1

Site 2 Site 1


Longitude 037 37 16.95 E 037 37 00.00 ETrue azimuth (°) 180.72 0.72Vertical angle (°) -0.32 0.16


Frequency (MHz) 13000.00Polarization Vertical




Radio model IDR_13CHP_16QAM_16xE1_1 IDR_13CHP_16QAM_16xE1_1TX power (watts) 0.16 0.16TX power (dBm) 22.00 22.00








(% - sec) 99.99991 - 27.84




Τετ, Αυγ 01 2007Site 1-Site 2.pl4Reliability Method - ITU-R P.530-7/8Rain - ITU-R P530-7

Link Budget / H-pol

16QAM,16 x E1

Site 2 Site 1


Longitude 037 37 16.95 E 037 37 00.00 ETrue azimuth (°) 180.72 0.72Vertical angle (°) -0.32 0.16


Frequency (MHz) 13000.00Polarization Horizontal




Radio model IDR_13CHP_16QAM_16xE1_1 IDR_13CHP_16QAM_16xE1_1TX power (watts) 0.16 0.16TX power (dBm) 22.00 22.00








(% - sec) 99.99991 - 27.84




Τετ, Αυγ 01 2007Site 1-Site 2.pl4Reliability Method - ITU-R P.530-7/8Rain - ITU-R P530-7

23.50 2 4 6 8 10 12 14 16 18 20 22120

140

160

180

200

220

240

260

280

300

Possible Ground Reflection Points – K = 1.33

23.50 2 4 6 8 10 12 14 16 18 20 22120

140

160

180

200

220

240

260

280

300

Possible Ground Reflection Points – K = 1.33

ATPC settings are based on the following rules of thumb for PDH and SDHsystems respectively:

A. PDH ATPC requirements• ATPC should be set at a minimum of 23 dB higher than the calculated RX

threshold level.

B. SDH ATPC requirements• ATPC should be set at a minimum of 18 dB higher than the calculated RX

threshold level.

Notes:• ATPC value is recommended to be set approximately to the calculated

link path RX signal level (or 5 dB lower, if applicable ) and preferably bere-adjusted after a period of observation.

• In IDR-C, ATPC local setting adjusts the remote RX signal level thusaffecting the local TX power level.

• In ISR, ATPC local setting adjusts the local RX signal level thus affectingthe remote TX power level.

ATPC Settings

Case study #1: 16 QAM 16xE1, IDR-C

34.25-48.25-82.522

Thermal FadeMargin

(dB)RX SignalRX Threshold Level

(dBm)TX Power

(dBm)

• RX signal is calculated for TX Power of 22 dBm.• The TX power dynamic range of this example is 10 dBm to -22 dBm.• For TX output power equal to 17 dBm, the RX signal should be -53.25 dBm.• -53.25 dBm is by 29.25 dB higher than the RX threshold level and thus

acceptable.• Finally, ATPC value sets the remote RX signal level to -53.25 dBm and thus

local TX will be adjusted to 17 dBm.

ATPC Settings, Continued

Case study #2: 128 QAM STM-1, ISR

18.75-52.25-7118

Thermal FadeMargin

(dB)RX SignalRX Threshold Level

(dBm)TX Power

(dBm)

• RX signal is calculated for TX Power of 18 dBm.• The TX power dynamic range of this example is 7 dBm to -18 dBm.• For TX output power equal to 12 dBm, RX signal should be -58.25 dBm.• -58.25 dBm is by 12.75 dB higher than the RX threshold level and thus not

acceptable. Note that -52.25 dBm is 18.75 dB higher than the RX threshold.• In this case, a range for ATPC cannot be set as the link already operates

marginally as far as calculated link budget is concerned.

In such a case, higher gain antennas would allow for more flexibility.NOTE

ATPC Settings, Continued

Tx Switching Criteria

Due to RAI signal (RemoteAlarm Indication) reception, thelocal station performs a Txswitching.

LD DDSLD TXALC

ISR

t = 8 st = 50 msTime

t = 13 st = 50 msTime

Due to RAI signal (RemoteAlarm Indication) reception, thelocal station performs a Txswitching.

LD DDSLD TXALCPSU

IDR-C

Indoor S/W CriteriaH/W Failure & AlarmsType

Outdoor Tx Switching Criteria for 1+1 Hot Standby Operation

Bringing Innovation and Expertise together!Bringing Innovation and Expertise together!

INTRACOM TELECOMINTRACOM TELECOM19,719,7 MarkopoulouMarkopoulou Ave.,Ave.,

PeaniaPeania, Athens, GR 19002, Athens, GR 19002

TT +30 210 667 1000+30 210 667 1000

FF +30 210 667 1001+30 210 667 1001

WW www.intracomwww.intracom--telecom.telecom.grgr

Date post:	28-Oct-2014
Category:	Documents
Upload:	nion83
View:	96 times
Download:	0 times

ODU-CHP Presentation Edition2

Documents