jotron TA-7650C Operating instructions

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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.
DSP
Digital Signal Processor
FbA, FbB, FbC
Functional buttons to maneuver in the menus, located at the front of the equipment.
FSK
Frequency Shift Keying
ICAO
International Civil Aviation Organization
IEC
International Electro-technical Commission.
INTERFACE
Electronic circuits that permit the passage of data between different types of devices.
ITU
International Telecommunication Union.

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LAN
Local Area Network
I.ED
Light Emitting Diode.
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.
PA
Power Amplifier
PSU
Power Supply Unit. Separate unit to power the equipment.
PTT
Push To Talk
RESET
To return stored values to either the default value or zero in memory.
RF
Radio Frequency
R/O
Read only
R/W
Read and Write
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
SNMP
Simple Network Management Protocol
This equipment is defined as an AGENT in an SNMP system.
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 21.05.10 26 PA New release
2 ES 26.05.10 26 A Inserted stock no
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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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TABLE OF CONTENTS
1MAINTENANCE AND TROUBLESHOOTING.................................................................................... 1-1
1.1 ENVIRONMENTAL CHECK...................................................................................................................... 1-1
1.2 ALARM READING .................................................................................................................................. 1-1
1.3 TX BITE MENU...................................................................................................................................... 1-2
1.3.1 BITE alarm condition................................................................................................................... 1-3
2TECHNICAL DESCRIPTION TA-7650C ..............................................................................................2-1
2.1 INTRODUCTION ..................................................................................................................................... 2-1
2.2 MAIN MODULE...................................................................................................................................... 2-2
2.2.1 Main board................................................................................................................................... 2-2
2.2.1.1 DSP .......................................................................................................................................... 2-2
2.2.1.2 Audio........................................................................................................................................ 2-2
2.2.1.3 Baseband DACs ....................................................................................................................... 2-2
2.2.1.4 PA Feedback ADC................................................................................................................... 2-2
2.2.1.5 BITE interface.......................................................................................................................... 2-3
2.2.1.6 I/O interface.............................................................................................................................. 2-3
2.2.1.7 Ethernet controller.................................................................................................................... 2-3
2.2.1.8 Memory.................................................................................................................................... 2-3
2.3 FRONT MODULE .................................................................................................................................... 2-3
2.3.1 Front board.................................................................................................................................. 2-3
2.4 PA MODULE .......................................................................................................................................... 2-3
2.4.1 PA board ...................................................................................................................................... 2-3
2.4.2 Regulator board ........................................................................................................................... 2-5
2.5 MODULATOR MODULE .......................................................................................................................... 2-5
2.5.1 Modulator board.......................................................................................................................... 2-5
2.6 SOFTWARE MODULE.............................................................................................................................. 2-6
2.7 PSU-7002 POWER SUPPLY UNIT ........................................................................................................... 2-6
2.8 REMOTE DATA INTERFACE ................................................................................................................... 2-6
3DIAGRAMS................................................................................................................................................ 3-1
3.1 TA-7650C TRANSMITTER UNIT............................................................................................................. 3-1
4PARTS LIST...............................................................................................................................................4-1
5APPENDIX.................................................................................................................................................5-1
5.1 PSU-7002 BILL OF MATERIALS ............................................................................................................. 5-1
5.2 PSU-7002 DIAGRAM 1OF 2................................................................................................................... 5-7
5.2.1 PSU-7002 diagram 2of 2.............................................................................................................. 5-8

85894_M&R_TA7650C_A 1-1
1MAINTENANCE AND TROUBLESHOOTING
1.1 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.
1.2 Alarm reading
If for some reason the “AL” light lit red and the display show one of these conditions, please
check TX BITE menu chapter 1.3 for abnormal readings.
Display text: Possible reason: Module or Board
Alarm Failure on the PA module PA module
Mod Failure on the Modulation module Modulation module
Front Failure on the Front Module Front module
Main Failure on the Main Module Main module
Ethernet Failure communicating with the ethernet_PHY Main board
Codec Failure communicating with the codec Main board
Spi Failure on the spi bus Main board
Front Failure communicating with the front module Main board
Remexp Failure communicating with the rem expander Main board
Biteadc Failure communicating with the bite adc Main board
Dsp Internal DSP failure Main board
txSpare Spare Spare

85894_M&R_TA7650C_A 1-2
1.3 TX Bite menu
To check the BITE alarm conditions, please see chapter 1.3.1 .
PA Module:Forward power in 1/10 dBm (472 =47dBm)
PA Module:Reflected power in 1/10 dBm (12 =1dBm)
PA Module:Calculated SWR in 1/10 (15 =1:1)
PA Module:Current consumption in milliAmps (mA)
PA Module:Temperature in degrees Celcius (°C)
PA Module:+28V DC voltage in milliVolts (mV)
PA Module:+12V DC voltage in milliVolts (mV)
FbA FbB
FbA FbB
PA Module:+5V DC voltage in milliVolts (mV)
PA Module:+3V3 DC voltage in milliVolts (mV)
PA Module:AM depth (modulation) in %
PA Module:FM deviation in kHz*10 (50=+/-5.0 kHz)
FbA FbB
Modulation Module:LO level in 1/10 dBm (100 =10dBm)
Modulation Module:LO Locked (1) or unlocked (2) - Locked is normal
Modulation Module:+6V voltage in milliVolts (mV)
Main Module:Line level output in 1/10 dBm (-100 =-10dBm)
FbA FbB
Push FbC
to enter
RX Alarm.

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1.3.1 BITE alarm condition
PARAMETER:
Alarm criteria Condition: Module:
Min Max Unit
PA_3V3 2.9 3.6 V PA
PA_5V 4.5 5.5 V PA
PA_12V 11 12.8 V PA
PA_28V 20 29 V PA
PA_CUR 0 10 A PA current drain PA
MOD_6V 5.0 7.0 V Modulator
MOD_LD_L01 Digital 3v3 - 3.3V Logic – alarm if unlocked Modulator
PA_TEMP -25 +85 °C PA temperature PA
MOD_LEVEL_L01 -20 8 dBm Modulator
PA_5VN -6.2 -4.0 V PA
PA_SWR NA NA - Calculated SWR Main

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2TECHNICAL DESCRIPTION TA-7650C
The transmitter TA-7650C is described in this manual.
2.1 Introduction
84555
TA-7650C
TRANSMITTER UNIT w/PSU
82417
PSU-7002
UNIT
84830
SW7000
BOOTLOADER
84552
SW
MODULE
84554
PA
MODULE
82419
FRONT
MODULE
84001
FRONT
BOARD
84557
MODULATOR
MODULE
84553
PA
BOARD
8245884006
MAIN
BOARD
84556
MODULATOR
BOARD
REG
BOARD
84558
MAIN
MODULE
84549
OPTION
POWER FILTER
The TA-7650C transmitter unit consists of five modules and five boards:
•Main module
•Main board
•Front module
•Front board
•PA module
•PA board
•Reg. board
•Modulator module
•Modulator board
•Software module