99137_TM_TA74xx_G 1

99137_TM_TA74xx_G 2

EC Declaration of Conformity available at: www.jotron.com

Abbreviations and definitions ALARM Message by which the unit signals the occurrence of an event. The alarm is indicated by an audible tone and/or a message (or icon) on the display. APM Audio and PTT Modem. The APM is designed for use in applications, which requires long distance control of radios through a 4 or 2 wire leased lines. The modems use in-band signaling for transfer of PTT and Squelch, and FSK data for transfer of alarms and Main/Standby selection. ARC With Audio Remote Control it is possible to extend the audio and PTT signals for a transmitter/receiver combination consisting of one main and one standby transceiver. One or two line pair is used for each transceiver and contains both PTT and audio in both directions. BAUD Transmission rate unit of measurement for binary coded data (bit per second). BIT Short form of Binary Digit. The smallest element of data in a binary-coded value. BITE Built In Test Equipment bps Bits Per Second. DRC Data Remote Control. With the DRC unit functions like frequency settings, BITE etc. are extended to a remote panel. The DRC unit requires 1 separate line pair that is connected to the serial interface of the radio. Several DRC units may share the same line. All functions in the transmitter can be controlled from the DRC. FSK Frequency Shift Keying IEC International Electro-technical Commission. INTERFACE Electronic circuits that permit the passage of data between different types of devices.

ITU International Telecommunication Union. I.ED Light Emitting Diode.

99137_TM_TA74xx_G 3

ORC Operators Remote Control. With the ORC it is possible to select frequencies, which are stored in the channel memory of the radio. To ease the operation, channel names can be used for each frequency. The ORC requires a separate line pair that is connected to the serial interface of the radio. Several ORC units may share the same line. RCU With the Remote Control Unit, several radios (up to 64) can be combined on one site and interfaced to a personal computer, using a special program (RACS). RESET To return stored values to either the default value or zero in memory. SIGNAL- TO-NOISE RATIO (S/N) Quantitative relationship between the useful and non-useful part of the received signal. A high S/N indicates a good receiving condition. S/N See SIGNAL- TO-NOISE RATIO SOFTWARE Values programmed and preloaded into memory. The values represent a permanent set of instructions for running the automatic functions (computations) of the unit. UHF Ultra High Frequency; A set of frequencies in the upper MHz region. VHF Very High Frequency; A set of frequencies in the lower MHz region. VSWR Voltage Standing Wave Ratio

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Amendment Record

AMENDMENT NO.

INCORP. BY

DATE PAGE(S) VERSION REASON FOR CHANGE

1 ES 05.04.05 A EM4478

2 ES 12.05.05 B Added PSU-7001 info in chapter 10

3 ES 10.01.06 42 C New release

4 ES 26.01.06 2-1 D New information

5 ES 22.02.06 2, 5 E New link to EC declaration

6 ES 23.03.06 5-2 F Corrected MOD text

7 ES 08.04.07 Total: 42 G New company name New logo

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The information in this book has been carefully checked and is believed to be accurate. However, no responsibility is assumed for inaccuracies. Jotron AS reserves the right to make changes without further notice to any products or modules described herein to improve reliability, function or design. Jotron AS does not assume any liability arising out of the application or use of the described product.

SAFETY INSTRUCTIONS

CAUTION!

This equipment contains CMOS integrated circuits. Observe handling precautions to avoid static discharges which may damage these devices.

WARNING!

Some RF semiconductor devices used in this equipment may contain Beryllium Oxide. If inhaled, dust from this oxide can be toxic. No danger will arise from normal handling but no attempt should be made to tamper with these devices. On no account must these transistors be destroyed or discarded with industrial or domestic waste, but should be returned to the manufacturers for subsequent disposal.

1. Do not place liquid-filled containers on top of the equipment. 2. Immediately turn off the power if water or other liquid leaks into the equipment.

Continued use of the equipment can cause fire or electrical shock. Contact Jotron AS for service.

3. Immediately turn off the power if the equipment is emitting smoke or fire. 4. Do not operate the equipment with wet hands.

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LIST OF CONTENTS

1 GENERAL DESCRIPTION ..................................................................................................................... 1-1 1.1 LIST OF SERIES 7000 UNITS .................................................................................................................. 1-1 1.2 TA-7450/25/10 AM TRANSMITTER UNIT .............................................................................................. 1-1

1.2.1 Applications.................................................................................................................................. 1-1 2 TECHNICAL SPECIFICATION............................................................................................................. 2-1

2.1 TRANSMITTER UNIT .............................................................................................................................. 2-1 2.2 POWER SUPPLY UNIT ............................................................................................................................ 2-2

3 FUNCTIONAL DESCRIPTION .............................................................................................................. 3-1 3.1 FRONT PANEL CONTROLS ..................................................................................................................... 3-1 3.2 TRANSMITTER REAR CONNECTORS....................................................................................................... 3-4 3.3 POWER SUPPLY UNIT, FRONT VIEW....................................................................................................... 3-8 3.4 POWER SUPPLY UNIT REAR CONNECTORS............................................................................................. 3-9

4 INSTALLATION ....................................................................................................................................... 4-1 4.1 INTRODUCTION. .................................................................................................................................... 4-1 4.2 POWER SUPPLY UNIT ............................................................................................................................ 4-2 4.3 REMOTE OPERATION............................................................................................................................. 4-2

4.3.1 Remote Line Interface .................................................................................................................. 4-2 4.3.2 Remote controls............................................................................................................................ 4-2

4.4 ANTENNA INTERFACE ........................................................................................................................... 4-3 4.5 TRANSMITTER / RECEIVER INSTALLATION............................................................................................ 4-4

4.5.1 Wiring Table. Interface Remote connectors TA-7450/25/10 to Krone patch panel. .................... 4-4 4.5.2 One Receiver and one Transmitter connected as one Transceiver............................................... 4-5 4.5.3 One Main and one Standby Transceiver ...................................................................................... 4-5 4.5.4 One Main / Standby Transmitter and one Main/Standby Receiver .............................................. 4-6 4.5.5 One Main/Standby Transceiver and Audio & PTT Modem.......................................................... 4-6 4.5.6 One Main Transceiver, one Standby Transceiver, ARC MK II and DRC .................................... 4-7

5 OPERATING INSTRUCTIONS .............................................................................................................. 5-1 5.1 INTRODUCTION ..................................................................................................................................... 5-1 5.2 LOCAL OPERATION................................................................................................................................ 5-1

5.2.1 Menu scrolling.............................................................................................................................. 5-1 5.3 MAIN MENU .......................................................................................................................................... 5-1

5.3.1 Main menu float diagram 1 of 2 ................................................................................................... 5-2 5.3.2 Main menu float diagram 2 of 2 ................................................................................................... 5-3

5.3.2.1 Offset Submenu........................................................................................................................ 5-4 5.4 SETTING MENU ..................................................................................................................................... 5-5

5.4.1 Setting menu float diagram .......................................................................................................... 5-5 5.5 CONFIGURATION MENU ........................................................................................................................ 5-6 U

5.5.1 Configuration menu float diagram............................................................................................... 5-7 5.5.1.1 Key Options.............................................................................................................................. 5-9

6 TECHNICAL DESCRIPTION TA-7450/25/10 ....................................................................................... 6-1 6.1 INTRODUCTION ..................................................................................................................................... 6-1 6.2 LF MODULE .......................................................................................................................................... 6-1 6.3 RF MODULE .......................................................................................................................................... 6-2 6.4 SYNTHESISER MODULE.......................................................................................................................... 6-2 6.5 FRONT BOARD....................................................................................................................................... 6-2 6.6 SOFTWARE MODULE.............................................................................................................................. 6-2

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6.7 PSU-7002 POWER SUPPLY UNIT ........................................................................................................... 6-2 6.8 REMOTE DATA INTERFACE ................................................................................................................... 6-2

7 MAINTENANCE AND TROUBLESHOOTING.................................................................................... 7-1 7.1 ENVIRONMENTAL CHECK ...................................................................................................................... 7-1 7.2 TUNING OF THE REFERENCE OSCILLATOR.............................................................................................. 7-1 7.3 ALARM INDICATIONS ............................................................................................................................ 7-1 7.4 TROUBLESHOOTING .............................................................................................................................. 7-2

8 APPENDIX ................................................................................................................................................. 8-1

99137_TM_TA74xx_G 1-1

1 GENERAL DESCRIPTION

1.1 List of series 7000 units The Jotron series 7000 consists of the following units: VHF/AM transmitter, simplex, 50W 118 - 136.975 MHz TA-7450 VHF/AM transmitter, simplex, 25W 118 - 136.975 MHz TA-7425 VHF/AM transmitter, simplex, 10W 118 - 136.975 MHz TA-7410 VHF/AM receiver, simplex 118 - 136.975 MHz RA-7202

1.2 TA-7450/25/10 AM transmitter unit This manual covers the complete transmitters TA-7450, TA7425 and TA-7410.

Figure 1.2, Complete Transmitter, TA-7450/25/10

1.2.1 Applications The transmitters TA-7450, TA7425 and TA-7410 can be used either as a stand alone AM transmitter for ground to air communication or together with a receiver, RA-7202 in a transceiver system named TR-7450, TR-7425 and TR-7410. The transmitter can be operated locally or from a remote location using 600-ohm lines and remote control units.

99137_TM_TA74xx_G 2-1

2 TECHNICAL SPECIFICATION

2.1 Transmitter Unit

TA-7410, TA-7425, TA-7450 STANDARDS EN 300 676 and EN 301 489-22:2000 ENVIRONMENTAL Temperature range -20°C to +55°C (operating) -40°C to +70°C (storage) Humidity 90% @+40°C (non condensing) Shock Transport: IEC-721-3-2, Class 2M3 Vibration Transport: IEC-68-2-32, Class 2M3. IEC-68-2-6 GENERAL, ALL UNITS AM 25 kHz AM 8.33 kHz RF Modes 6K80A3EJN 5K00A3EJN Audio response +1/-3dB rel. 1KHz, 300-3400 Hz, -25dB at 5000Hz +1/-3dB rel. 1KHz, 300-2500 Hz, -25dB at 3200Hz Frequency range 118-137 MHz (option: expanded frequency range) Data ports RS232 and RS485. Speed 1200b/s or 9600b/s selectable. BITE monitoring Voltages, Current, Line level, Temperature, Forward and Reflected power, Lock detect and Modulation. Supply voltage, DC 21.6 - 31.2VDC negative ground. Voltage below 27VDC will reduce TX output power. MTBF >10 years / unit MTTR <30 minutes at lowest replaceable unit TRANSMITTER AM 25 kHz AM 8.33 kHz Frequency stability ± 1.5ppm (± 1ppm at 0 to 40°C) ± 1.5ppm (± 1ppm at 0 to 40°C) Adjacent channel power >70 dBc >60 dBc Output power 10W, 25W or 50W in different models. Adjustable to 80%, 50%, 25% or 10% of full power. Keying options Local key: Front panel, Mic. connector and remote connector. Line loop key: +48VDC or -48VDC key Modulation level AM up to 95%. Limiting amplifier prevents modulation higher than 95%. Distortion < 5% at 90% modulation Harmonic emission < 80dBc Spurious emission < 90dBc Line input 600Ω, -35 to +7dBm Mic input Dynamic. Sensitivity 2.5mV nominal. LF compression (VOGAD) >30dB with less than 3dB change in modulation level. Intermodulation protection ratio >40 dB when interfering signal is decoupled with at least 30 dB Tx timeout 10s to 5 min in 10s step Carrier offset 4 carrier offsets according to ICAO annex 10. Keying time < 20ms Release time < 10ms VSWR 1 : Infinity. Output is reduced automatically with severe mismatch. Hum and noise level Better than 45dB below 90% modulation Monitor 600 ohm output. Level adjustable from front panel and remote. -20dBm to +10dBm. Duty cycle 100% continuous operation at ambient temperature below 40°C Power consumption <280VA at TX 50W, 90% modulation RF output impedance 50 ohm, N-Connector Dimension Transmitter unit 142mm(28TE)(W) * 230mm(D) * 128mm (H) Weight 3Kg

99137_TM_TA74xx_G 2-2

2.2 Power Supply Unit

POWER SUPPLY UNIT PSU-7002 STANDARDS EN 60950-1:2001, EN 61000-6-3: 2001, EN 61000-6-1:2001 and EN 55022 classB ENVIRONMENTAL Temperature range -20°C to +55°C (operating) -40°C to +70°C (storage) Humidity 90% @+40°C (non condensing) Shock Transport: IEC-721-3-2, Class 2M3 Vibration Transport: IEC-68-2-32, Class 2M3. IEC-68-2-6 POWER UNIT PSU-7002 Supply voltage, AC 115/230VAC +15/-10% / 50-60Hz Output voltage +28VDC regulated DC throughput When AC not present Max load 10A Dimension PSU unit 71mm (14TE)(W) * 303mm(D) * 128mm (H) Weight 1.3Kg

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3 FUNCTIONAL DESCRIPTION

3.1 Front Panel Controls

Figure 3.1, Front view, TA-7450 / 7425 / 7410 1 DISPLAY Shows operating frequency bite information or various menu settings. 2 « » button For moving through menus and adjusting selected value up.

3 « » button For moving through menus and adjusting selected value down.

4 «↵» button The Enter button is used to select the various menus/values.

5 HI/LOW SWITCH Selects the power output for the transmitter. HI is full power (50W - TA-7450). LOW is 25% of full power, i.e. 10 W for a 50W transmitter.

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6 PTT BUTTON

Press to key the transmitter. 7 REMOTE SWITCH

The switch decides whether the audio and keying signals should be taken from the microphone socket or from the remote connector. In local position, both audio for the transmitter and the key signal (PTT) is taken from the microphone input. In remote, audio and key signals are taken from the 600Ω remote line input/output. Pressing the remote switch disables the local frequency control and enables the remote control of the transmitter.

8 MAIN ON/OFF Turns the transmitter on and off.

9 ALARM LED Indicator to show that the BITE in the transmitter has detected an error condition. The cause of the fault will be shown in the display.

10 SWR LED

Shows that the SWR on the antenna is above the threshold (app. 2:1). The transmitter will reduce the output power to low power.

11 LOW POWER LED

Indicator to show that the transmitter is operating in low power. Either because the low power switch has been pressed or because the BITE has put the transmitter in low power due to SWR, Low voltage or high temperature..

12 «OUT» LED Shows that the transmitter is keyed.

13 REMOTE LED Indicator to show remote operation (remote switch is pressed).

14 ON LED Shows that the transmitter is switched on.

15 STANDBY LED The transmitter is kept in standby by an external signal.

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16 MICROPHONE connector The microphone should have 600Ω impedance with a sensitivity of 5 mV. .

Microphone socket.

The microphone socket has the following pin assignment: 1 Microphone input.

2 Microphone supply (+12V via 2k2 resistor) 3 P.T.T. (Local key) input 4 Microphone ground 5 N.C. 6 N.C.

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3.2 Transmitter Rear Connectors

31 2

4

5

6

Figure 3.2, Rear view, TA-7450/25/10 1 ANTENNA CONNECTOR N-type antenna input.

Connected directly to an external antenna or to a multi coupler if more than one transmitter is sharing the same antenna. Alternatively the transmitter antenna can be connected to the standby input of a main transmitter in a main/standby configuration.

2 ANTENNA STANDBY / RX ANTENNA OUTPUT CONNECTOR BNC-type antenna input/output.

This connector is connected to the internal keying relay in the transmitter. It can be used as a receiver output, or it can be connected to the transmitter output of a second (Standby) transmitter, which shares the same antenna as the main transmitter.

99137_TM_TA74xx_G 3-5

3 DC INPUT CONNECTOR

Connector for DC supply (21.6 - 31.2 VDC), Either the PSU-7002 or an external (battery) supply. A is the positive (+) connection and B is the negative (-).

4 REMOTE FACILITY CONNECTOR (15 pin D-SUB) This connector contains various signals for remote control of the radio.

PIN NO DESCRIPTION 1 Inhibit input. A positive voltage of 12 V applied to this pin will

prevent transmitting. This can be useful when using a external power amplifier. This input can then be used to prevent RF output before the Rx/Tx relay in the power amplifier has switched over.

2 Microphone input.

Connected in parallel with the microphone input on the front panel.

3,4 Monitor output.

Symmetrical 600Ω monitor output line. Can be used as the input to a tape recorder, or as a test of the transmitter performance. It contains the transmitted audio demodulated after the final stage of the transmitter RF amplifier. Level is adjustable from the front panel. When the transmitter is not keyed, the line will carry receiver audio if a receiver is connected.

5,6 Line input.

600 Ohm balanced line input. This is the main input, which is used when the transmitter is controlled from a remote position. The input is fed with the TX audio in transmit position. Input level is from -30 to + 10 dBm (typical 0 or -10 dBm), and is adjustable on the front panel.

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PIN NO DESCRIPTION 7 External key input.

A positive or negative voltage (referenced to GND pin 15) between 10 and 48 V applied to this pin will key the transmitter when the Key Option menu is set to REM KEY (Ref ch. 5.4.7). To enable this key option the transmitter has to be set to remote operation (button in the front panel).

8 +12V (wired together with PL5, pin 5) 9,10 Key relay.

Dry contact, which closes when the transmitter is keyed. May be used to control external equipment or to mute an associated receiver by connecting one line to the MUTE input of the receiver (pin 12) and the other to the GND pin of the receiver (pin 15).

11 Not connected 12 KEY input

A low level on this pin will key the transmitter when the Key Option menu is set to GND KEY. To enable this key option the transmitter has to be set to remote operation (button in the front panel). The pin can be connected in parallel with the MUTE input of a receiver (pin 12) to simultaneously mute the receiver while transmitting.

13 Select input. If the select input is kept low (0V) or open the transmitter is operating normally. If the select input is high (+5V to +12V) the transmitter will not be «selected», i.e. the transmitter will be in STANDBY mode (indicated by the front panel LED) and will not be keyed by any key signals. The function of this pin can be inverted in Options menu.

14 ALARM output.

Dry contact. Pull up to +12V. Open = Transmitter is operating normally. Closed to gnd = Transmitter is OFF or the BITE has detected an internal error.

15 GND. Common Ground.

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5 REMOTE SERIAL DATA CONNECTOR (9-PIN D-SUB) This connector contains the RS-485 serial bus, and a 12 V output .

PIN NO DESCRIPTION 1 RS-485 communication (-) or RS-2321 , serial communication, TX. 2 RS-485 communication (+) or RS-2321 , serial communication, RX. 3 Low power. Grounding this pin forces the transmitter to low output

power. 4 Not connected 5 12V DC output for remote equipment (max. 100 mA). Connected to the internal 12V through a diode for reverse protection. 6 Common ground. 7,8,9 Not connected.

6 EARTH TAG CONNECTION Earth Tag RM 5327 A4-4,8. To secure proper earth connection of the radio in sub racks or cabinets.

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3.3 Power Supply Unit, front view.

PSU-7002

Figure 3.3, Power supply unit - front view

1 «AC» LED Shows that the PSU is operating on AC mains power. 2 «ON» LED Indicates that the PSU is switched on.

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3.4 Power Supply Unit rear connectors.

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3

2

1

Figure 3.4, Power supply unit - front view 1 DC Input Connector

This connector is connected to the external DC backup supply (21.6 - 31.2 VDC). A is the positive connector pin (+) and B is the negative (-).

2 DC Output Connector

This connector is connected to the transmitter. A is the positive connector pin (+) and B is the negative.

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3 Earth Tag Connector Earth Tag RM 5327 A4-4,8. To secure proper earth connection of the Power Unit in sub racks or cabinets.

4 AC Input Connector

Input for external AC.

AC is input between A and C, B is chassis ground. The voltage range is from 105 to 250 VAC

99137_TM_TA74xx_G 4-1

4 INSTALLATION

4.1 Introduction. The transmitter and PSU is housed in a standard 3U plug-in unit that fits into a standard 19″ sub rack. The width of the Power Unit is 14TE and the Transmitter Unit 28TE i.e. two transmitters with PSU can be mounted in the same sub rack.

Figure 4.1.a, Two Transmitters with PSU in one 19" sub rack

Figure 4.1.b, Transceiver TR-7550/25/10 in one 19" sub rack

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4.2 Power Supply Unit Power supply unit is designed to operate from both AC and DC supply. Normally AC is the main supply and DC is the backup supply. The PSU will automatically switch to the backup supply in case the main supply fails if both the AC and DC power supply connection is made to the power supply unit. Connection to the supplies should be made with good quality power cable.

4.3 Remote Operation

4.3.1 Remote Line Interface When the equipment is operated from a remote site, the audio signal is on a 600Ω line. The radio is equipped with internal line transient suppressers, however, for long lines in noisy environment it might be necessary to terminate the lines in external suppressors or fuses. The remote line is connected to pin 5 and 6 on the DB15 connector on the rear panel. Use a shielded cable for the line connection to avoid RF interference.

4.3.2 Remote controls With a remote control, all functions of the radio can be extended using standard 600-ohm lines, RS-232 or RS-485 interface. The following remote controls are available for the radio: RCU With the Remote Control Unit, several radios (up to 64) can be combined on one site and interfaced to a personal computer, using a special program (RACS). ARC MKII With the ARC MKII unit it is possible to extend the audio and PTT signals for a transmitter/receiver combination consisting of one main and one standby transceiver. One or two line pair is used for each transceiver and contains both PTT and audio in both directions. DRC With the DRC unit functions like frequency settings, BITE etc. are extended to a remote panel. The DRC unit requires 1 separate line pair that is connected to the serial interface of the radio. Several DRC units may share the same line. All functions in the transmitter can be controlled from the DRC.

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ORC With the ORC it is possible to select frequencies, which are stored in the channel memory of the radio. To ease the operation, channel names can be used for each frequency. The ORC requires a separate line pair that is connected to the serial interface of the radio. Several ORC units may share the same line. Audio/PTT Modem The Audio/PTT Modem is designed for use in application, which requires long distance control of radios through a 4 or 2 wire leased lines. The modems use in-band signalling for transfer of PTT and Squelch, and FSK data for transfer of alarms and Main/Standby selection. COM 260/2600/4500 The COM systems are designed for use in applications for long distance control of several radios and at the same time multiple operating consoles TE10-39 or PC consoles. The connection between the radios and the operating consoles can be 4 wire E & M lines via satellite or radio link, or 4 wire leased lines.

4.4 Antenna Interface The antenna should be of good quality with regards to gain and VSWR to obtain maximum performance. Make sure that the VSWR on the antenna is low, and that the cable from the transmitter to the antenna is of good quality to avoid mismatch and unnecessary losses. A cable loss of 1 dB is the same as reducing the power output of a 50W transmitter to less than 40W. Similarly, a cable loss of 2 dB is the same as reducing the output power to less than 32W. In areas were thunderstorms and lightning is a problem, surge arrestors should be mounted between the antenna connector and the antenna cable. The arrestors should be of good quality and be capable of handling the output power of the transmitter. The antenna output of the transmitter is an N-type antenna connector on the back of the transmitter. The second connector (BNC-type) is the output of the antenna relay and can be used for a receiver or for a standby transmitter. Connect the antenna output either directly to an antenna, or to the STANDBY input of another transmitter (MAIN transmitter).

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4.5 Transmitter / Receiver Installation In many cases a combined installation of a transmitter and receiver is convenient. Using the built in T/R switch of the transmitter, the antenna input of the receiver is connected to the RX output of the transmitter. The transmitter and the receiver may share the same remote line by connecting them in parallel. Also the key signal might be connected in parallel to key the transmitter and mute the receiver at the same time. For local operation, the key relay output (pin 9 and 10) of the transmitter may be used to mute the receiver by connecting this relay to the key input and ground (pin 12 and 15) on the receiver.

4.5.1 Wiring Table. Interface Remote connectors TA-7450/25/10 to Krone patch panel. 15 pin D-sub: Wire Colour: Function: KRONE patch panel:1 White Inhibit input a a 2 Brown Microphone input b

1 b

3 Green Monitor output a a 4 Yellow Monitor output b

2 b

5 Grey Line input a a 6 Pink Line input b

3 b

7 Blue External Key input a a 8 Red +12VDC b

4 b

9 Black Key relay a a 10 Violet Key relay b

5 b

11 Grey/Pink Optional a a 12 Red/Blue Key input b

6 b

13 White/Green Select input a a 14 Brown/Green Alarm output b

7 b

15 Shield GND a a 9 pin D-sub: b

8 b

6 Pink GND a a 5 Grey +12VDC b

9 b

2 Brown RS-485 Com RX a a 1 White RS-485 Com TX b

10 b

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4.5.2 One Receiver and one Transmitter connected as one Transceiver

15 pins DSUB connections

TA-74xx RA-7202 Pin no. Function Pin

no. Function

5 LINE 5 LINE 6 LINE 6 LINE

7* REM KEY 9 K1 12 MUTE

15, 10 GND, K2 15 GND 12* GND KEY

* Actual key alternative is selected in the CONFIG menu for the transmitter.

4.5.3 One Main and one Standby Transceiver

15 pins DSUB connections

TA-74xx Main RA-7202 Main TA-74xx Standby RA-7202 Standby Pin no. Function Pin no. Function Pin no. Function Pin

no. Function

5 LINE 5 LINE 5 LINE 5 LINE 6 LINE 6 LINE 6 LINE 6 LINE

7* REM KEY 7* REM KEY 9 K1 12 MUTE 9 K1 12 MUTE

15, 10 GND, K2 15 GND 15,10 GND,K2 15 GND 12* GND KEY 12* GND KEY

13,14 SELECT**, ALARM

13,14 SELECT**,ALARM

13 SELECT 13 SELECT

14 ALARM 14 ALARM 13 SELECT 13 SELECT * Actual key alternative is selected in the CONFIG menu for the transmitter. ** The SELECT function for RA main and TA main, in the CONFIG menu, must be set to INVERT.

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4.5.4 One Main / Standby Transmitter and one Main/Standby Receiver

15 pins DSUB connections

TA Main TA Standby RA Main RA Standby Pin no.

Function Pin no.

Function Pin no.

Function Pin no.

Function

5 LINE 5 LINE 5 LINE 5 LINE 6 LINE 6 LINE 6 LINE 6 LINE 7* REM KEY 7* REM KEY 9 K1 9 K1 12 MUTE 12 MUTE

15, 10 GND, K2 15, 10 GND,K2 15 GND 15 GND 12* GND KEY 12* GND KEY 14 ALARM 13 SELECT

14 ALARM 13 SELECT *Actual key alternative is selected in the Transmitter CONFIG menu.

4.5.5 One Main/Standby Transceiver and Audio & PTT Modem

25 pins DSUB (Audio PTT) + 15 pins DSUB connections

Audio & PTT TA-74xx Main RA-7202 Main TA-74xx Standby RA-7202 Standby

Pin no. Function Pin no. Function Pin no. Function Pin no. Function Pin no. Function 1 AUDIO OUT 5 LINE 5 LINE 2 AUDIO OUT 6 LINE 6 LINE 3 AUDIO IN 5 LINE 5 LINE 4 AUDIO IN 6 LINE 6 LINE 5 KEY 12 GNDKEY 12 GNDKEY

6, 20 GND 15, 10 GND, K2 15 GND 15, 10 GND,K2 15 GND 8 SQUELCH 9 SQUELCH 9 SQUELCH

9, 13, 15, 17,

21

RELAY, OPTOCOUP-LER, +5V

12 SELECT(M) 13 SELECT 13 SELECT 14 SELECT(S) 13 SELECT 13 SELECT 16 ALARM(S) 14 ALARM 14 ALARM 18 ALARM(M) 14 ALARM 14 ALARM

9 K1 12 MUTE 9 K1 12 MUTE

RS-485. 9- pins DSUB connections

Audio & PTT TA-74xx Main RA-7202 Main TA-74xx Standby RA-7202 Standby Pin no. Function Pin no. Function Pin no. Function Pin no. Function Pin no. Function

1 RS485 (-) 1 RS485 (-) 1 RS485 (-) 1 RS485 (-) 1 RS485 (-) 2 RS485 (+) 2 RS485 (+) 2 RS485 (+) 2 RS485 (+) 2 RS485 (+)

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4.5.6 One Main Transceiver, one Standby Transceiver, ARC MK II and DRC

25 pins DSUB (ARC MKII) + 15 pins DSUB connections

ARC MK II TA-74xx Main TA-74xx Standby RA-7202 Main RA-7202 StandbyPin no.

Function Pin no.

Function Pin no.

Function Pin no.

Function Pin no.

Function

1 ALARM(M) 14 ALARM 14 ALARM 2 SQUELCH 9 SQUELCH 9 SQUELCH 6 SELECT(S) 13 SELECT 13 SELECT 7 SELECT(M) 13 SELECT 13 SELECT 8 PTT, Relay 12 PTT 12 PTT 9 PTT, Relay C Connected to GND. Pin 14

10 LINE(RX) 5 LINE 5 LINE 11 LINE(RX) 6 LINE 6 LINE 12 LINE(TX) 5 LINE 5 LINE 13 LINE(TX) 6 LINE 6 LINE 14, 9

GND, PTT Relay C

15, 10

GND, K2

15, 10

GND, K2

15 GND 15 GND

25 ALARM(S) 14 ALARM 14 ALARM 9 K1 9 K1 12 MUTE 12 MUTE

RS-485. 25 pins DSUB (ARC MKII) + 9 pins DSUB connections

ARC MK II TA-74xx Main TA-74xx Standby RA-7202 Main RA-7202 Standby

Pin no.

Function Pin no.

Function Pin no.

Function Pin no.

Function Pin no.

Function

16 RS485 (B) 1 RS485 (B) 1 RS485 (B) 1 RS485 (B) 1 RS485 (B) 17 RS485 (A) 2 RS485 (A) 2 RS485 (A) 2 RS485 (A) 2 RS485 (A)

ARC MKII and DRC. 9 pins DSUB connections.

DRC ARC MK II

Pin no.

Function Pin no.

Function

1 RS485 (B) 1 RS485 (B) 2 RS485 (A) 2 RS485 (A) 5 + 12 V 5 + 12 V 6 GND 6 GND 7 ALARM (S) 7 ALARM (S) 8 ALARM (M) 8 ALARM M)

99137_TM_TA74xx_G 5-1

5 OPERATING INSTRUCTIONS

5.1 Introduction When the receiver is switched “ON”, the display will first show “TA-74xx”, then the version number, serial number and finally it ends up showing the operating frequency. The operating frequency is shown with 6 digits according to the ICAO standard.

For the 8.33 kHz and 25kHz -bandwidth, the frequency will be shown:

DISPLAY SHOWING: ACTUAL FREQUENCY: CHANNEL SPACING: 127.005 127.0000 MHz 8.33 kHz 127.010 127.0833 MHz 8.33 kHz 127.015 127.1666 MHz 8.33 kHz 127.025 127.0250 MHz 25 kHz

5.2 Local operation When operated locally, the operator has full access to all facilities using the various controls on the front panel. The menu system of the TA-74xx is divided into three menus, the Main menu, the Setting menu and the Configuration menu. Showing the operating frequency is the normal position for entering the menus.

5.2.1 Menu scrolling To be able to manoeuvre fast up and down within a menu, press and hold the Up button for fast Up, or the Down button , for fast Down, and simultaneously press the opposite button to start scrolling. The scrolling steps will be 10% of the menu except for frequency selection where the steps will be 1 MHz.

5.3 Main menu To enter the Main menu press the Enter button . In the Main menu the user can change transmitter frequency, read data from the built in test equipment (BITE), store and recall frequencies and adjust the display brightness. To manoeuvre in the main menu, use the Up button and Down button . The different submenus are selected by pressing the enter button on the wanted menu. Access restriction is possible entering the Lock Option from the Configuration menu described in paragraph 5.5.

126.100

99137_TM_TA74xx_G 5-2

5.3.1 Main menu float diagram 1 of 2

Operating frequency 118 – 137 MHz. Built-in self-test measurements (BITE).

READING BITE MEASUREMENTS

OK if 20V < xx.x < 30V

OK if 9.5V < xx.x < 14.5V OK if 4.3V < x.x < 5.6V OK if 4.3V < x.x < 5.6V OK if 4.3V < x.x < 5.6V Indication of Reflected power

OK if xx < 85ºC Line level in dBm

Modulation in % OK if x.x < 12.0A

OK if Forward power > 0.5W

99137_TM_TA74xx_G 5-3

5.3.2 Main menu float diagram 2 of 2

OPTION. Shows offset frequency. See paragraph 5.3.2.1. Built-in self-test measurements (BITE). To adjust the brightness of the display. Can be adjusted in seven steps from 0 to 6. To change the operating frequency. OPTION. To offset selected frequency . See paragraph 5.3.2.1. To recall a previous stored operating frequency in a specific channel (01-99). To store an operating frequency in a specific channel (01-99).

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99137_TM_TA74xx_G 5-4

5.3.2.1 Offset Submenu The Offset function is an optional function that has to be ordered separately. The function is only visible on 25kHz channels. Set an offset from the main carrier frequency according to ICAO annex 10. The offset can be chosen with Up button (∧) and Down button (∨) between the following values. -8.0, -7.5, -7.3, -5.0, -4.0, -2.5, 0, +2.5, +4.0, +5.0, +7.3, +7.5 and +8.0. OFS: -8.0

-8.0, -4.0, 0, +4.0, +8.0 are used for 5 channel offset. -7.5, -2.5, +2.5, +7.5 are used for 4 channel offset. -7.3, 0, +7.3 are used for 3 channel offset. -5.0,+5.0 are used for 2 channel offset. When the offset (or the frequency in offset mode) are changed, the transmitter use some time (up to 10 sec.) to synthesise the new frequency. This is because an optimum reference value is calculated for the synthesiser. When the transmitter is offset from the carrier frequency, a “+” or” –“ is added to the first character from the right of the display. A “+” shows that the transmitter is offset to a frequency above the frequency displayed, and a “-“ means that the transmitter is offset to a frequency below the frequency displayed. By pressing the Down button , one can see the channel offset in kHz. When the frequency is changed to another channel, the offset is reset to zero.

99137_TM_TA74xx_G 5-5

5.4 Setting Menu The settings menu lets the user change parameters like remote address, line level, TX/RX monitor level, modulation degree, power level, alarm thresholds and transmitter timeout. It can only be accessed from the menu where the frequency is shown, and then by pressing the Enter button while the Up button is kept depressed.

5.4.1 Setting menu float diagram

Operating frequency 118 – 137 MHz. Setting address for RS-485 communication. 01 – EF (Hex value) Digital pot meter for line input sensitivity adjustment. Range 0 – 100%. Digital pot meter for transmitter monitor output level adjustment. This signal comes from the directional coupler. Range 0 – 100%. Digital pot meter for receiver monitor output level adjustment. Range 0 – 100%. Must be adjusted after TXMO as they affect each other. Digital pot meter for transmitter modulation output level adjustment. Range 0 – 98%. The modulation level must be measured using a test generator with modulation meter.

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99137_TM_TA74xx_G 5-6

Digital pot meter for transmitter

power output level adjustment. The output power can be reduced to 80, 50, 25,10 or 0% of full power. Digital pot meter for setting level of alarm threshold for power output. The alarm level can be activated at output power of 80, 50, 25,10 or 0% of PWR setting. Setting the maximum allowed keying time for the transmitter in 10 second steps up to 5 minutes. 0 = disabling of timeout function. Internal 1 kHz modulation generator to set modulation.

Save new settings and return to start menu.

Preset factory settings and return to start menu.

Exit without saving.

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5.5 Configuration Menu To enter the Configuration menu, press the Up button and Enter button at the same time as the power is turned on. The configuration menu lets the user change parameters that are usually only changed when the transmitter is installed or during service. It is important to note that changes to this menu can result in a degradation of the transmitter performance. Only qualified technicians should perform changes to this menu.

99137_TM_TA74xx_G 5-7

5.5.1 Configuration menu float diagram

To execute users from all menus except BITE menu and adjustment of display brightness. If x = 1, an alarm is generated if SWR > 3:1. If x = 0, no alarm when high SWR. Muting of audio line ON/OFF. Setting fast or slow return time of the audio AGC. ON = FAST. Audio AGC ON/OFF.

Line termination on/off. ON = 600 ohm line termination. OFF = no line termination. For KEY Options see paragraph 5.5.1.1.

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99137_TM_TA74xx_G 5-8

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The Select signal is connected to pin 13 on the 15-pin D-sub. A signal will activate a stand-by receiver. Choose between positive or negative signal activation.

Fine tuning of the reference oscillator. Hex value 00 – FF.

Select type of serial line interface.

Select Baud rate for the serial line interface.

In a Main/Standby configuration select “MAIN” for the Main transmitter and “NORM” for the Standby transmitter. When “MAIN” is selected, the transmitter shut down if an alarm pops up. For “NORM” the transmitter will continue.

ON = to activate delay of RF power 100msec after key. Set to OFF when Jotron PAV is used. Save new settings and return to start menu. Preset factory settings and return to start menu.

Exit without saving.

99137_TM_TA74xx_G 5-9

5.5.1.1 Key Options The transmitter has five alternatives for remote keying and the actual keying method is selected in the Key Options menu (KEY OPT).

KEY OPT

When KEY OPT is set OFF, the transmitter can only be keyed locally by using the PTT button in the front panel, or short circuit PIN 3 and 4 in the microphone connector. Alternative 1 and 2 use dedicated pins on the 15 pins DSUB, while alternative 3-5 are Line Key Options that transfer the key signal on the audio line (pin 5 and 6 on the 15 pins DSUB).

1. GND KEY Keying by connecting PIN 12 to ground.

2. REM KEY

Keying by supplying +/- (10-48) VDC, referred to GND, to PIN 7.

3. A-KEY Keying by supplying +/-(10-48) VDC, referred to GND, to PIN 5 and 6. The transmitter can also be keyed by supplying the voltage to PIN 6 only.

4. B-KEY

Keying by connecting a DC Short Circuit between PIN 5 and 6.

5. C-KEY Keying by supplying +/-(10-48) VDC between Pin 5 and 6.

To enable these key options the transmitter has to be set to remote operation (button in the front panel).

99137_TM_TA74xx_G 6-1

6 TECHNICAL DESCRIPTION TA-7450/25/10 Please see Maintenance and Repair Manual for more detailed technical description, schematics and parts lists.

6.1 Introduction

X – 99200 TA-7450

TRANSMITTER UNIT

X – 82158SW

MODULE

X – 99042 RF

MODULE

X – 99038FRONT BOARD

X – 99043LF

MODULE

X – 82417PSU-7002

UNIT

X – 99033 SYNTH

MODULE The TA-7450 transmitter unit consists of four modules and one board: • LF module • Synth module • RF module • Software module • Front board

6.2 LF module The LF module contains all the audio processing, amplifiers and filters, user and remote interface, micro controller that controls the synthesiser and BITE, and can be divided into the following sections: • Synthesiser • Audio circuits • Control circuits It has a built in ADC with multiplexer which is used to measure the most important parameters in the transmitter, and the self-check (BITE) functions is handled by this circuit. The LF module is connected to the RF module.

99137_TM_TA74xx_G 6-2

6.3 RF module The RF module contains the transmitter power amplifier chain, antenna relay, directional couplers, and voltage regulators, and can be divided into three main sections: • RF amplifier. • Directional couplers and filter • Voltage regulators. The RF module is connected to the LF module.

6.4 Synthesiser module The Synthesiser module is located inside a separate screened box on the PCB. A micro controller sets up the synthesiser and controls several functions in the transmitter. The Synthesiser module is connected to the LF module.

6.5 Front board The front board holds the display and the push buttons on the front panel and contains the LED display and the push buttons visible on the front panel. The board is connected directly to the LF module.

6.6 Software module The Software module contains all necessary software to make the TA-74xx transmitter unit functional.

6.7 PSU-7002 Power supply Unit The PSU converts an AC input voltage between 105VAC and 250VAC to a 28V regulated DC voltage to support the 7000 series transmitters. The maximum load is 280VA. If both the AC and DC power supply connection is made to the PSU, it will automatically switch to the DC backup supply in case the main AC supply fails.

6.8 Remote Data Interface The data on the RS-232/RS-485 bus is transferred both ways with a data rate of 1200 b/s, using 9 bit data format, and 1 stop bit.

99137_TM_TA74xx_G 7-1

7 MAINTENANCE AND TROUBLESHOOTING

7.1 Environmental check Once a year:

1. Turn OFF the unit. 2. Disconnect all plugs. 3. Clean all metal surfaces using a humid rag to remove dirt and dust. 4. Clean the knobs and connectors. 5. Clean the loudspeaker cover. 6. Connect all plugs. 7. Turn ON the unit.

7.2 Tuning of the reference oscillator It is necessary to check the tuning the frequency of the reference oscillator after 1 year and then every year. The frequency offset of the transmitter is checked with a frequency counter or a transmitter-test set. Frequency compensation is done by fine-tuning the reference oscillator (OSC), described in the Configuration menu in paragraph 5.5.1. More detailed information can be found under paragraph 6.3.1 about the IC204 reference oscillator.

7.3 Alarm indications ALARM CRITERIA: ALARM LED: DISPLAY MESSAGE: 20V > 27VDC > 30V ON ERR 27V 9.5V > 12V DC >14.5V ON ERR 12V 4.3V > 5V(1,2,3) DC > 5.6V ON ERR 5V(1,2,3) CURR > 12A ON ERR CURR TMP > 85ºC ON ERR TMP Synthesizer out of lock ON ERR SYNT SWR if enabled ON ERR SWR PWR if enabled ON ERR PWR

99137_TM_TA74xx_G 7-2

7.4 Troubleshooting

• ERR 27V: The +27V is out of range. Check X-99042 RF-module.

• ERR 12V: The +12V is out of range. Check X-99042 RF-module.

• ERR 5V1: The +5V1 is out of range. Check X-99042 RF-module.

• ERR 5V2: The +5V_DIG is out of range. Check X-99869 LF-BOARD.

• ERR 5V3: The +5V_ANA is out of range. Check X-99869 LF-BOARD.

• ERR CURR: The current consumption in the transmitter is too high. Check X-99042 RF-module.

• ERR TMP: Internal temperature is out of range (above 85˚C). Check X-99042

RF-module and whether the fans are revolving.

• ERR SYNT: Synthesizer is out of lock. Check X-99866 Synth unit.

• ERR SWR: Reflected power exceeds 3:1, and SWR ALARM is enabled in the CONFIG menu. Possible faults: Defective antenna, antenna cable, cavity filter out of tune etc.

• ERR PWR: Output power drops below threshold level as indicated in the

SETTINGS menu. Possible faults: Defective PSU-7002 causes drop on the transmitter supply voltage, defective output-stages etc.

• ERR EXAL: Not a fault on the unit, but a state set from remote equipment in

example the Jotron RACS program. Also called external alarm.

• Other faults that may occur on the TA-74XX transmitter:

No display, but light still present in LEDs. Possible faults: Check if the unit could have been remotely switched off

from the Jotron RACS program.

Not able to power up the transmitter. Check PSU-7002, cable between PSU and transmitter and X-99042

RF-module. Possible faults: Defective ON/OFF switch SW102A, fuse F101 or

ON/OFF relay REL101.

99137_TM_TA74xx_G 8-1

8 APPENDIX

99137_TM_TA74xx_G 8-2