Jotron AS RA-7203C VHF Receiver 156.300-162.000MHz for coast stations and offshore installations requiring high quality FM voice and digital selective calling (DSC) User Manual Operators handbook TR7750

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Date Submitted	2014-06-06 00:00:00
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Document Title	Operators handbook TR7750
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Document Author:	Otto Holm

Approvals
The equipment is designed to meet the essential requirements of European Directives 1999/5/EC,
89/336EEC as amended by Directive 93/68/EEC and 72/23/EEC
Standards
The following standards are applied:
EMC:
Health and Safety:
Radio specifications:
EN301843-1 and EN301843-2
FCC part 80
EN60950
EN301929-1 and EN301929-2
For an updated list of approvals and statements of conformity, these are available on:
www.jotron.com
Jotron AS| TR7750C: Operators Manual  Introduction
P/N: 84748 (G)
Page ii
List of abbreviations and definitions
BITE
Built In Test Equipment
bps
Bits Per Second.
DSP
Digital Signal Processor
ETSI
European Telecommunication Standardisation Institute
ICAO
International Civil Aviation Organization
IEC
International Electro-technical Commission.
LAN
Local Area Network
PA
Power Amplifier
PSU
Power Supply Unit. Separate unit to power the equipment.
PTT
Push To Talk
RF
Radio Frequency
S/N
SIGNAL- TO-NOISE RATIO
SNMP
Simple Network Management Protocol, a network protocol used to control the radio equipment.
This equipment is defined as an AGENT in a SNMP system.
VSWR
Voltage Standing Wave Ratio
Jotron AS| TR7750C: Operators Manual  Introduction
P/N: 84748 (G)
Page iii
Amendment Record
NO
INIT
DATE
CHAPTERS
ES
13.08.08
OH
11.11.08
3.2.5, 3.2.6, 3.2.7,
3.4.4, 3.4.5, 3.4.6
ES
29.06.09
3-5
Information regarding type of LAN cable
OH
10.11.09
3.4.5, 1.1
Pin 8 Aux 2 is N/C, Output power configuration
range in radio model table.
BA
05.04.13
3.2.7, 3.2.8, 3.4.6,
4.6.1
Fixed RS485 polarity error.
BR
28.04.14
4.4
FCC and IC approval
BA
04.06.14
Page vi
Added warning statement, modification warning
statement and digital device statement.
All
VERSION
REASONFOR CHANGE
84748_O
perators
_TR7000
C_A
New product
Information regarding Frequency stability,
Hardware Key and protection of I/O lines added.
10
11
12
13
14
15
16
17
18
19
20
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.
Jotron AS| TR7750C: Operators Manual  Introduction
P/N: 84748 (G)
Page iv
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.
Jotron AS| TR7750C: Operators Manual  Introduction
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Page v
WARNING STATEMENT
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
MODIFICATION WARNING STATEMENT
Changes or modifications not expressly approved by the party responsible for compliance could void
the user's authority to operate the equipment.
DIGITAL DEVICE STATEMENT
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
--Reorient or relocate the receiving antenna.
--Increase the separation between the equipment and transceiver.
--Connect the equipment into an outlet on a circuit different from that
to which the transceiver is connected.
--Consult the dealer or an experienced radio/TV technician for help.
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TABLE OF CONTENTS
INTRODUCTION ....................................................................................................................... 1-1
1.1
1.2
1.3
TECHNICAL SPECIFICATIONS ............................................................................................ 2-1
2.1
2.2
2.3
2.4
MODELS COVERED BY THIS MANUAL ..................................................................................... 1-1
LAYOUT OF THE TRANSCEIVER .............................................................................................. 1-1
APPLICATIONS ........................................................................................................................ 1-2
GENERAL SPECIFICATION, TRANSCEIVER UNITS, TR-7750C ................................................ 2-1
TRANSMITTER UNITS, TA-7650C .......................................................................................... 2-1
RECEIVER UNIT, RA-7203C................................................................................................... 2-2
POWER SUPPLY UNIT, PSU-7002 ........................................................................................... 2-2
FUNCTIONAL DESCRIPTION ............................................................................................... 3-1
3.1 FRONT PANEL CONTROLS, TRANSMITTER UNIT .................................................................... 3-1
3.1.1
Display ............................................................................................................................ 3-1
3.1.2
Scroll/Select switch and Navigation buttons A, B and C ................................................ 3-1
3.1.3
PTT button ...................................................................................................................... 3-1
3.1.4
ON/OFF button............................................................................................................... 3-1
3.1.5
LED Indicators ............................................................................................................... 3-2
3.1.6
Mic/Headset connector ................................................................................................... 3-2
3.2 TRANSMITTER, REAR CONNECTIONS ...................................................................................... 3-4
3.2.1
Antenna connector (50 ohm N) ....................................................................................... 3-4
3.2.2
Receiver ant. Connector (50 ohm BNC) ......................................................................... 3-4
3.2.3
DC input connector (Amphenol MS 3106A 10SL4S)(Jotron P/N: 96715) ..................... 3-4
3.2.4
LAN connector (RJ45) .................................................................................................... 3-5
3.2.5
AUX1 CONNECTOR (RJ45) .......................................................................................... 3-5
3.2.6
AUX2 connector (RJ45) .................................................................................................. 3-6
3.2.7
REM connector (RJ45) ................................................................................................... 3-6
3.2.8
Rx connector (RJ45) ....................................................................................................... 3-7
3.3 FRONT PANEL CONTROLS, RECEIVER UNIT ........................................................................... 3-8
3.3.1
Display ............................................................................................................................ 3-8
3.3.2
Scroll/Select switch and Navigation buttons A, B and C ................................................ 3-8
3.3.3
ON/OFF button............................................................................................................... 3-8
3.3.4
LED Indicators ............................................................................................................... 3-8
3.3.5
Headset connector .......................................................................................................... 3-9
3.4 RECEIVER, REAR CONNECTIONS ........................................................................................... 3-10
3.4.1
Antenna connector (50 ohm N) ..................................................................................... 3-10
3.4.2
DC input connector (Amphenol MS 3106A 10SL4S)(Jotron P/N: 96715) ................... 3-10
3.4.3
LAN connector (RJ45) .................................................................................................. 3-11
3.4.4
AUX1 CONNECTOR (RJ45) ........................................................................................ 3-11
3.4.5
AUX2 connector (RJ45) ................................................................................................ 3-12
3.4.6
REM connector (RJ45) ................................................................................................. 3-12
3.5 PSU-7002, POWER SUPPLY UNIT, FRONTVIEW .................................................................... 3-13
3.5.1
LED Indicators ............................................................................................................. 3-13
3.6 POWER SUPPLY UNIT REAR CONNECTORS. .......................................................................... 3-14
3.6.1
DC input connector (Amphenol MS 3106A 10SL4S)(Jotron P/N: 96715) ................... 3-14
3.6.2
DC Output Connector(Amphenol MS 3106A 12S3P)(Jotron P/N: 93697) .................. 3-14
3.6.3
AC Input connector ....................................................................................................... 3-15
INSTALLATION ........................................................................................................................ 4-1
4.1
INTRODUCTION. ...................................................................................................................... 4-1
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4.2 INITIAL INSPECTION ............................................................................................................... 4-1
4.3 INSTALLATION INTO EQUIPMENT CABINET ............................................................................ 4-2
4.4 ANTENNA CONNECTORS ......................................................................................................... 4-2
4.5 AC AND DC CONNECTORS ..................................................................................................... 4-2
4.6 REMOTE SIGNALS ................................................................................................................... 4-2
4.6.1
REM connector (receiver) and RX connector (transmitter) ........................................... 4-3
4.6.2
Audio in/out and Line loop keying .................................................................................. 4-6
4.6.3
Other key signals ............................................................................................................ 4-9
4.6.4
Squelch and AGC signals, receiver unit ....................................................................... 4-11
4.6.5
Alarm and Select signals transmitter and receiver ....................................................... 4-12
4.6.6
Miscellaneous signals, transmitter ............................................................................... 4-14
4.7 APPLICATIONS ...................................................................................................................... 4-15
4.7.1
Transceiver, local configuration................................................................................... 4-15
4.7.2
Transceiver, remote configuration ............................................................................... 4-18
4.7.3
Transmitter, main / backup configuration .................................................................... 4-20
4.7.4
Receiver, main / backup configuration ......................................................................... 4-22
OPERATING INSTRUCTIONS ............................................................................................... 5-1
5.1 INTRODUCTION ....................................................................................................................... 5-1
5.2 USER MENU – TRANSMITTER (RESTRICTED ACCESS LEVEL) .................................................. 5-2
5.3 USER MENU – TRANSMITTER (DEFAULT ACCESS LEVEL)....................................................... 5-3
5.4 SETTING, INFORMATION AND CONFIGURATION MENUS – TRANSMITTER ............................... 5-4
5.4.1
Radio control group........................................................................................................ 5-5
5.4.2
TX config group .............................................................................................................. 5-5
5.4.3
Interface config group .................................................................................................... 5-6
5.4.4
Bite system group............................................................................................................ 5-7
5.4.5
System info group ........................................................................................................... 5-7
5.5 PARAMETER DETAILS – TRANSMITTER .................................................................................. 5-8
5.5.1
Radio control group........................................................................................................ 5-8
5.5.2
TX config group .............................................................................................................. 5-8
5.5.3
Interface config group .................................................................................................. 5-11
5.5.4
Bite system group.......................................................................................................... 5-14
5.6 USER MENU – RECEIVER (RESTRICTED ACCESS LEVEL) ....................................................... 5-15
5.7 USER MENU – RECEIVER (DEFAULT ACCESS LEVEL)............................................................ 5-16
5.8 SETTING, INFORMATION AND CONFIGURATION MENUS – RECEIVER.................................... 5-17
5.8.1
Radio control group...................................................................................................... 5-18
5.8.2
RX config group ............................................................................................................ 5-18
5.8.3
Interface config group .................................................................................................. 5-19
5.8.4
Bite system group.......................................................................................................... 5-20
5.8.5
System info group ......................................................................................................... 5-20
5.9 PARAMETER DETAILS – RECEIVER ....................................................................................... 5-21
5.9.1
Radio control group...................................................................................................... 5-21
5.9.2
RX config group ............................................................................................................ 5-22
5.9.3
Interface config group .................................................................................................. 5-23
5.9.4
Bite system group.......................................................................................................... 5-26
ERROR CONDITIONS AND CORRECTIVE ACTIONS ..................................................... 6-1
6.1
6.2
TRANSMITTER ERROR CONDITIONS ........................................................................................ 6-1
RECEIVER ERROR CONDITIONS............................................................................................... 6-5
LIST OF TABLES AND FIGURES .......................................................................................... 7-1
APPENDIX A.
LIST OF MARITIME CHANNELS AND FREQUENCIES............................ 7-1
Jotron AS| TR7750C: Operators Manual  Introduction
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Page ix
1 Introduction
1.1 Models covered by this manual
The following models / variants are covered by this operator’s manual
Model
P/N
TR-7750C, Transceiver
TA-7650C, Transmitter
RA-7203C, Receiver
Contain units
Output
Modes
X-84610
Frequency
range
RA-7203C, TA-7650C, 10 - 50 Watts 156-162 MHz
X-84555
TA-7650C,
FM, (G3E)
X-84550
PSU-7002
RA-7203C
N/A
Table 1.1-1, Radio models
PSU-7002
10 - 50 Watts 156-162 MHz
156-162 MHz
FM, (G3E)
FM, (G3E)
Throughout this manual the term transmitter unit, TX, TA-7650C refers to the transmitter unit.
The term transceiver, TR, TR-7750C refers to any variant of the transceiver unless specifically noted
in the text and the term receiver, RX and RA-7203C is used for the receiver unit.
1.2 Layout of the transceiver
The receiver unit, RA-7203C operates as an independent receiver. The transmitter unit TA-7650C
operates as an independent transmitter, but requires the power supply unit, PSU-7002 for operation
on AC power. The receiver and transmitter units may be placed in entirely different locations or
together when configured as a transceiver.
Figure 1.1, Complete Transceiver, RA-7203C, TA-7650C and PSU-7002
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1.3 Applications
The transmitter TA-7650C and the receiver RA-7203C can be used either as a standalone transmitter
/ receiver for maritime voice or data communication, or combined as a transceiver.
The transmitter / receiver can be operated in the following modes:
 Locally as an analogue FM transceiver, with microphone and headphone connected to the
front panel connector,
 Connected to a VCS (Voice Control System) using 600-ohm analogue lines for audio, together
with keying in form of in-band tones, external voltages or phantom keying.
 In addition the transmitter/receiver has a large range of options for remote control using
Ethernet, serial lines or front panel controls.
Jotron AS| TR7750C: Operators Manual  Introduction
P/N: 84748 (G)
Page 1-2
2 Technical SPECIFICATIONS
2.1 General specification, Transceiver Units, TR-7750C
Standards
EN 301489-x ,Health and Safety: EN 60950,Radio specifications:EN301929-1 and EN301929-2,FCC part80
Environmental, all units
Temperature range
Humidity
Shock
Vibration
EMC
-20°C to +55°C (operating) -40°C to +70°C (storage)
90% @+40°C (non condensing)
Transport: IEC-721-3-2, Class 2M3
Transport: IEC-68-2-32, Class 2M3. IEC-68-2-6
EN 301 489 – part 22, FCC, IC
General, all units
FM 25 kHz
Frequency range
Frequency stability
RF Modes
Keying time
Bit rate
Frequency response
Data ports
Protocols
BITE monitoring
156-162 MHz , All channels, simplex and duplex within the maritime VHF band is available.
+/- 1.0 ppm
G3E
G3E
G2B
< 1.0ms
< 1.0ms
< 1.0ms
2.4 kbit/s
350-2500 Hz
300-3400 Hz
RS232, RS485, 100BaseT
Simple Network Management Protocol (SNMP v.2), RS232, RS485; See Protocol description
VSWR, Voltages, Currents, Levels, Lock detect,
Temperature, Output power, Reflected power, a.o.
Supply voltage, AC
Supply voltage, DC
MTBF
MTTR
115/230VAC +15/-10% / 50-60Hz
21.6 - 31.2VDC negative ground
>10 years / unit
<30 minutes at lowest replaceable unit
FM 12.5 kHz
DSC
2.2 Transmitter Units, TA-7650C
Transmitter unit
Output power
Adjacent channel power
Modulation level
Distortion
Line input
Intermodulation protection
ratio
Tx
timeout
Inband keying
VSWR
Duty cycle
Power consumption
Dimension Transmitter nit
FM 25 kHz
FM 12.5 kHz
DSC
10-50W
>80dBc
>80dBc
>70dBc
up to ± 5kHz deviation
< 3%
600, -36 - +7dBm
>40 dB when interfering signal is decoupled with at least 30 dB
10s to 5 min in 10s steps
Configurable tones: 150 – 3400Hz
1 : Infinity
100% continuous operation @ambient below 40°C
<280VA
142mm(28TE)(W) * 230mm(D) * 128mm (H), Weight 3.0 kg
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2.3 Receiver Unit, RA-7203C
Receiver unit
FM 25 kHz
Sensitivity, FM@1V/30% pd
Adjacent channel rejection
Intermodulation (3 signal)
IF bandwidth
Image and IF frequency
response
Squelch operation
10dB SINAD (CCITT)
>80dB
>80 dBc
+/- 11kHz
>110 dB
Adjustable -107dBm, 30dB
S/N + carrier override
Activation time <20ms
Hysteresis <3dB
30% - 90%, <1dB variation
Audio AGC
Signal / Noise
AGC range
Inband squelch signal
Line output
Harmonic distortion
Cross modulation
Blocking
Dynamic range
Spurious response rejection
Weight
Dimension Receiver unit
FM 12.5 kHz
DSC
>80dB
>70dB
+/- 3.5 kHz
+/- 11 kHz
>45dB on any output @100V, 30%
-107dBm to +5dBm
User configurable tones: 150 - 3400 Hz
600, -36 - +7dBm @90% modulation
<5% @90% AM (line output)
>85dB @ 100 kHz frequency offset
>100dB @1MHz offset,>110 dB out of band signals
>110dB
>90dB
1.7 kg
71mm (14TE)(W) * 230mm(D) * 128mm (H)
2.4 Power Supply Unit, PSU-7002
Power supply unit
Supply voltage, AC
Output voltage
DC throughput
Max load
Dimension PSU unit
Weight
115/230VAC +15/-10% / 50-60Hz
+28 VDC regulated
When AC not present
10A average, 18A peak (300W)
71mm (14TE)(W) * 303mm(D) * 128mm (H)
1.3Kg
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3 Functional description
3.1 Front Panel Controls, Transmitter unit
Navigation
button A
Display
Navigation
button B
PTT button
Navigation
button C
Scroll / Select
Switch
ON/OFF
button
Indicators:
LOW: Transmits in low power
AL:
Alarm active (red)
REM: Remote ready (green)
STBY: Standby (yellow)
Indicators:
OUT: Output power indicator
SWR: High SWR indicator
Mic/Headset
connector
Figure 3.1-1, Front view, transmitter unit, TA-7650C/25C/10C
3.1.1 Display
The display shows the most important operational parameters; Channel, frequency and modulation.
In addition, the display will show several menus, submenus and operational parameters when
entering into the menu using Navigation button A.
3.1.2 Scroll/Select switch and Navigation buttons A, B and C
The navigation buttons, A, B and C, together with the Scroll/Select switch are used to navigate
through the menus.
The Scroll/Select switch has three actions: It can be turned clockwise, anti-clockwise, or momentarily
pressed.
In general the use of the navigation buttons are:
A or Scroll/Select right: Increase a value (up)
B or Scroll/Select left: Decrease a value (down)
C or Scroll/Select press: Confirm or Enter.
The user interface will indicate which navigation button to use.
3.1.3 PTT button
This button is used to immediately key the transmitter for test/measurement purposes, connected
together with the PTT line available on the microphone connector.
3.1.4 ON/OFF button
Press and hold button (for app. 2s) to switch unit ON or OFF.
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3.1.5 LED Indicators
LOW (yellow):
The transmitter transmits in low power, either caused by an internal failure
(SWR, Temperature, or low input voltage) or set by the user. The low power
level is adjustable.
AL (red):
Indicates that an alarm is present in the transmitter unit. Details of the alarm
will be shown on the display.
REM (green):
This LED has multiple functions. The REMOTE indicator will be lit with a
constant green colour when the transmitter is “ready” for remote operation.
Ready means that the keying options has been set to include keying from an
external source, and that the voice input has been set to an external source
(600 ohm line input).
In addition the REMOTE indicator will flash yellow each time the unit is
communicating on either of the remote interfaces (RS232, RS485, Ethernet).
STBY (yellow):
The transmitter is kept in standby, either by user input, an external signal to
the remote interface or because an alarm condition has been detected, and
the transmitter is set up as a MAIN transmitter. In standby the transmitter
will not be able to send, even if a valid key signal is input to the unit.
OUT (yellow):
Indicate that the transmitter is keyed and power is being generated. The LED
is activated based on RF detected on the output of the power amplifier, thus
the LED gives an indication that power is generated.
SWR (red):
Indicate that the SWR on the antenna is above the threshold value (app. 3:1).
The transmitter will reduce the output power to the predefined low power
level in order to protect the output stage.
3.1.6
Mic/Headset connector
Mic/Headset connector
Name
PIN Purpose
Mic input
Dynamic. Sensitivity 2.5mV nominal.
Mic GND
Reference input for mic signal
Headset output, contains sidetone and/or received
Headset
audio when used with a receiver (RA7203)
RS232
RS232 TX
RS232
RS232 RX
PTT
PTT input. Connect to GND (p.8) to key
+12VDC
+12 VDC to mic. Amplifier (10mA)
GND
Common ground
Table 3.1-1, Mic/Headset connector, transmitter, pin out
The Mic/Headset connector is used for multiple purposes:

Microphone/Headset connector:
Connect the microphone to the Mic input/Mic GND, the +12VDC can be used to power the
microphone or a microphone amplifier. The +12VDC is current limited at 100mA.
The Headset output (referenced to GND) contains the local sidetone generated from the
demodulated signal on the output of the transmitter when the transmitter is keyed, or the
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Page 3-2
received audio if the transmitter is connected to a receiver using the T/R bus available on the
rear panels (for details see chapter 3.2.4)

RS232 serial line
The RS232 serial line that can be used to control radio parameters from an external unit, or
to upload new firmware into the radio unit for future functionality. Details regarding
firmware upgrade is described in the maintenance and repair manual.

Hardware key to change access level:
order to change the access level (see chapter 5.5.3 for details) a hardware
key must be inserted into the microphone/headset connector before
entering in to the menu system. The hardware key consists of a RJ45
connector where pin no. 4 and 5 (RS232 RX and TX) is connected together.
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3.2 Transmitter, rear connections
Figure 3.2-1, Rear view, transmitter unit, TA-7650C/25C/10C.
3.2.1 Antenna connector (50 ohm N)
Interface to the antenna cable for the transmitter or the transceiver when used together with a
receiver unit
3.2.2 Receiver ant. Connector (50 ohm BNC)
BNC-Type antenna output – 50 ohm. This connecor is connected to the antenna relay internally in
the transmitter unit and can be connected directly to the antenna input of a mating receiver unit
(RA7203).
3.2.3
DC input connector (Amphenol MS 3106A 10SL4S)(Jotron P/N: 96715)
Figure 3.2-2, Transmitter DC input connector, rear view
Connector for DC supply (21.6 - 31.2 VDC).
Connected to the mating power supply, PSU-7002, or to an external DC supply.
A is the positive (+) connection and B is the negative (-) connection points.
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Page 3-4
3.2.4 LAN connector (RJ45)
This connector contains the Ethernet bus and is normally connected to a nearby switch/hub or
directly to a computer, using a screened twisted pair Ethernet cable.
LAN interface connector
Name
PIN Purpose
LAN_TXP
Tx data
LAN_TXN
Tx data
LAN_RXP
Rx data
LAN_D3P
Optional
LAN_D3N
Optional
LAN_RXN
Rx data
LAN_D4P
Optional
LAN_D4N
Optional
Table 3.2-1, LAN interface connector, pin out
3.2.5 AUX1 CONNECTOR (RJ45)
This connector is normally connected to equipment used for remote control / remote supervision of
the transmitter.
AUX1 connector, transmitterAUX
Name
ALARM_P
ALARM_N
Select_in_P
RS232_S
RS232_R
Select_in_N
+12V
GND
PIN
Purpose
Alarm out-relay (NO)
Alarm out-relay (NO)
Select in, optocoupler input
RS232 Transmit data
RS232 Receive data
Select in, optocoupler input
+12VDC output to external equipment (max 300mA)
Common ground
Table 3.2-2, AUX1 connector, transmitter, pin out
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7
3.2.6 AUX2 connector (RJ45)
This connector is normally connected to equipment used for remote control / remote supervision of
the transmitter.
AUX2 connector, transmitter
Name
PIN Purpose
KEY_OUT_P
Closed=Transmitting, optocoupler output
KEY_OUT_N
Closed=Transmitting, optocoupler output
MONITOR_P
Monitor output to tape recorder
TXLOW_P
Applying a voltage > 5VDC between pin 4 and 5
forces the transmitter into low power
TXLOW_N
Applying a voltage > 5VDC between pin 4 and 5
forces the transmitter into low power
MONITOR_N
Monitor output to tape recorder
TXKEY_P
Applying a voltage > 5VDC between pin 7 and 8 will
key the transmitter
TXKEY_N
Applying a voltage > 5VDC between pin 7 and 8 will
key the transmitter
Table 3.2-3, AUX2 connector, transmitter, pin out
3.2.7 REM connector (RJ45)
This connector is normally connected to equipment used for remote control / remote supervision of
the transmitter. It contains the most basic interfaces used for remote control, and will in many cases
be the only connector used.
Note that this connector will also have the most basic functionality for remote controlling the
receiver when the Rx connector is connected to the REM connector on a receiver. In this case the
line, and squelch out signals from the receiver are reflected also on the REM connector.
REM connector, transmitter – Remote control of transceiver
Name
PIN Purpose
RS485+
RS485 (+)
RS4852
RS485(-)
LINE_P
Diff. line input/output to TA/RA, 600 ohm
TX_KEY_G
Grounding this pin will key transmitter
RX_BUSY_OUT 5
RX Busy indicator output (squelch indicator)
LINE_N
Diff. line input/output to TA/RA, 600 ohm
ALARM
Low=Alarm (TA or TA/RA)
GND
Common ground
Table 3.2-4, REM connector, transmitter, pin out
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3.2.8 Rx connector (RJ45)
This connector is normally connected to the REM connector on a mating receiver when used in a
transceiver configuration.
It gives functionality to a transceiver such as: Common 2 wire line interface, received audio in
transmitter local headset, transceiver alarm, TX/RX busy signalling when used as a VDL modem.
Rx connector, transmitter. Interface to RX (transceiver config)
Name
PIN Purpose
RS485+
RS485 (+)
RS4852
RS485(-)
LINE_P
Diff. line input from Receiver unit, 600 ohm
TX_BUSY
TX Busy indicator output (Mute output)
RX_BUSY
RX Busy optocoupler-input (Repeater key input)
LINE_N
Diff. line input from Receiver unit, 600 ohm
INT_ALARM 7
Low=Alarm (Note: I/O – low input will also be
recognized as an alarm (EXT))
GND
Common ground
Table 3.2-5, Rx connector, transmitter, pin out
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3.3 Front Panel Controls, Receiver unit
Navigation
button A
Display
Scroll / Select
Switch
Navigation
button B
Sq / Navigation
button C
Indicators:
SQ: Squelch open (yellow)
AL:
Alarm active (red)
REM: Remote ready (green)
STBY: Standby (yellow)
ON/OFF
button
Headset
connector
Loudspeaker
Figure 3.3-1, Front view, receiver unit, RA-7203C
3.3.1 Display
The display shows the most important operational parameters; Channel, frequency and modulation.
In addition, the display will show several menus, submenus and operational parameters when
entering into the menu using Navigation button A.
3.3.2 Scroll/Select switch and Navigation buttons A, B and C
The navigation buttons, A, B and C, together with the Scroll/Select switch are used to navigate
through the menus.
The Scroll/Select switch has three actions: It can be turned clockwise, anti-clockwise, or momentarily
pressed in.
In general the use of the navigation buttons are:
A or Scroll/Select right: Increase a value (up)
B or Scroll/Select left: Decrease a value (down)
C or Scroll/Select press: Confirm or Enter.
The user interface will indicate which navigation button to use.
Navigation button C is dedicated to squelch ON/OFF button in the default view.
3.3.3 ON/OFF button
To switch the unit ON or OFF: Press and hold button for approx 2s
3.3.4
LED Indicators
SQ (yellow):
The receiver squelch is open (receiving audio) when lit.
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AL (red):
Indicates that an alarm is present in the receiver unit. Details of the alarm
will be shown on the display.
REM (green):
This LED has multiple functions. The REMOTE indicator will be lit with a
constant green colour when the receiver is “ready” for remote operation.
Ready means that the audio is output to an external source (600 ohm line
input).
In addition the REMOTE indicator will flash yellow each time the unit is
communicating on either of the remote interfaces (RS232, RS485, Ethernet).
STBY (yellow):
The receiver is kept in standby, either by user input, an external signal to the
remote interface or because an alarm condition has been detected, and the
receiver is set up as a MAIN receiver. In standby the receiver will not output
any audio on any audio interface.
3.3.5
Headset connector
Mic/Headset connector
Name
PIN Purpose
N/C
No connection
N/C
No connection
Headset
Headset output contains received audio.
RS232
RS232 TX
RS232
RS232 RX
N/C
No connection
+12VDC
+12 VDC to external amplifier (10mA)
GND
Common ground
Table 3.3-1, Headset connector, receiver, pin out
The Headset connector is used for multiple purposes:

Headset connector:
The Headset output (referenced to GND) contains the received audio.

RS232 serial line
The RS232serial line that can be used to control radio parameters from an external unit, or to
upload new firmware into the radio unit for future functionality. Details regarding firmware
upgrade is described in the maintenance and repair manual.

Hardware key to change access level:
order to change the access level (see chapter 5.5.3 for details) a
hardware key must be inserted into the microphone/headset connector
entering in to the menu system. The hardware key consists of a RJ45
connector where pin no. 4 and 5 (RS232 RX and TX) is connected
together.
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In
before
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3.4 Receiver, rear connections
Figure 3.4-1, Rear view, receiver unit, RA-7203C.
3.4.1 Antenna connector (50 ohm N)
Connect directly to a receiver antenna, or to the receiver antenna connector (BNC) on the
transmitter unit.
3.4.2
DC input connector (Amphenol MS 3106A 10SL4S)(Jotron P/N: 96715)
Figure 3.4-2, Receiver DC input connector, rear view
Connector for DC supply (21.6 - 31.2 VDC).
Connect to an optional external DC supply to operate the unit on DC or as a backup supply if the
main AC fails.
A is the positive (+) connection and B is connected to ground or chassis (-).
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3.4.3 LAN connector (RJ45)
This connector contains the Ethernet bus and is normally connected to a nearby switch/hub. It can
also be connected directly to a computer, using a twisted pair Ethernet cable.
LAN interface connector
Name
PIN Purpose
LAN_TXP
Tx data
LAN_TXN
Tx data
LAN_RXP
Rx data
LAN_D3P
Optional
LAN_D3N
Optional
LAN_RXN
Rx data
LAN_D4P
Optional
LAN_D4N
Optional
Table 3.4-1, LAN interface connector, pin out
3.4.4 AUX1 CONNECTOR (RJ45)
This connector is normally connected to equipment used for remote control / remote supervision of
the receiver.
AUX1 connector, receiver unit
Name
PIN Purpose
ALARM_P
Alarm out-relay (NO)
ALARM_N
Alarm out-relay (NO)
Select_in_P
Select in, optocoupler input
RS232_S
RS232 Transmit data
RS232_R
RS232 Receive data
Select_in_N
Select in, optocoupler input
+12V
+12VDC output to external equipment (max 100mA)
GND
Common ground
Table 3.4-2, AUX1 connector, receiver, pin out
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7
3.4.5
AUX2 connector (RJ45)
This connector is normally connected to equipment used for remote control / remote supervision of
the transmitter.
AUX2 connector, receiver unit
Name
PIN Purpose
Squelch_out_P 1
Closed=Receiving (Sq open), optocoupler output
Squelch_out_N 2
Closed=Receiving (Sq open), optocoupler output 9
AGC_HILO_P
Hi/Lo output depending on signal strength,
optocoupler output
N/C
N/C
AGC_HILO_N 6
Hi/Lo output depending on signal strength
AGC_OUT
AGC analogue voltage output, depending on signal
strength. Referred to GND
N/C
Table 3.4-3, AUX2 connector, receiver, pin out
3.4.6
REM connector (RJ45)
This connector is normally connected to a mating transmitter unit (RX connector) when used in a
transceiver configuration, or to other equipment used for remote control of the receiver.
When connected to a transmitter, the connector gives “transceiver” functionality to the transmitter
and contains necessary signals for audio and control. The TX_BUSY and RX_BUSY signals are also used
in data modes to signal that the transmitter or receiver is busy transferring data.
Interface to Remote equipment or a transmitter unit
Name
PIN Purpose
RS485+
RS485 (+)
RS4852
RS485(-)
LINE_P
Line output from Receiver unit, 600 ohm
TX_BUSY
TX Busy indicator input (Mute input)
RX_BUSY
RX Busy output
LINE_N
Line output from Receiver unit, 600 ohm
INT_ALARM 7
Low=Alarm (Note: I/O – low input will also be
recognized as an alarm (EXT))
GND
Common ground
Table 3.4-4, REM connector, receiver, pin out
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3.5 PSU-7002, Power Supply Unit, frontview
Indicators:
AC: Operating on AC
ON: ON (DC output)
Figure 3.5-1, PSU-7002, front view
3.5.1
LED Indicators
AC (yellow):
ON (green):
Indicates that AC is present, and that the unit currently is operating on the
main AC power supply.
Indicates that the PSU is ON and delivers DC on its output.
The DC is either derived from the main AC input (shown by the AC indicator),
or from the backup DC input (AC indicator dark).
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3.6 Power Supply Unit rear connectors.
Figure 3.6-1, Power supply unit - rear view
3.6.1 DC input connector (Amphenol MS 3106A 10SL4S)(Jotron P/N: 96715)
The DC input is connected to the DC backup supply (if available).
Input range is 21.6 - 31.2 VDC and current consumption is max 9A average when the transmitter
operates with full power output (50W).
A is the positive (+) connection and B is connected to ground (-).
Figure 3.6-2, DC input connector, PSU
3.6.2 DC Output Connector(Amphenol MS 3106A 12S3P)(Jotron P/N: 93697)
The DC output connector is connected to the transmitter unit and contains the +28V DC supply for
the transmitter. The DC is generated from the main AC input or the DC backup input.
Figure 3.6-3, DC output, PSU
A is the positive connector pin (+) and B is connected to ground (-).
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3.6.3
AC Input connector
Input for external AC.
AC is input between A and C, B is chassis ground.
The voltage range is from 85 to 250 VAC
Figure 3.6-4, AC input connector, PSU
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4 Installation
4.1 Introduction.
The procedures for installing the radio units / transceiver are described in table 4.1 below.
It is recommended that these procedures are completed in the order shown.
Procedure
1 Initial inspection
2 Install equipment into 19” sub racks (equipment cabinet)
3 Connect chassis stud to system earth or cabinet
Reference
4.2
4.3
Figure 3.2-1 (TX)
Figure 3.4-1 (RX)
Figure 3.6-1
(PSU)
Connect remote connectors as required
Connect antenna connectors
Connect DC supply (if required)
Connect AC supply (if required
4.6
4.4
4.5
4.5
Table 4.1-1, Installation procedures
4.2 Initial inspection
Items included for a TA-7650C transmitter
1 Radio unit TA-7650C1
2 Power supply unit PSU-7002
3 Interconnecting cord between TA and PSU
4 CD with Operators guide
5 DC connector
6 AC power cord
P/N
84555
82417
81725
84417
96715
92375
Items included for a RA-7203C receiver
1 Radio unit RA-7203C
2 CD with Operators guide
3 DC connector
4 AC power cord
P/N
84550
84417
96715
92375
On receipt of the radio units, remove all transit packaging and check that there is no damage to the
equipment. If damage is evident, contact Jotron immediately and retain the original transit
packaging.
Variants may include: - Reduced maximum power level <50 W
- PM modulation
- Frequency range 156 – 162MHz
- Inband ptt signalling (option: 84358)
- Inband squelch signalling (option: 84358)
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4.3 Installation into equipment cabinet
The units may be installed into a standard 19” subrack with a height of 3U.
The total subrack is divided into 84 TE units. The transmitter occupies 28 TE, the PSU occupies 14TE
and the receiver unit occupies 14TE.
For a transceiver this leaves a free space of 28TE available for other equipment.
Figure 4.3-1 shows some examples for installation into 19” subrack. From top to bottom the figure
shows: 6 receivers in one subrack, 2 transmitters with PSU in one subrack and 3 transmitters without
PSU (operated on DC) in one subrack.
Figure 4.3-1, Examples of various configurations
4.4 Antenna connectors
The antenna should be of good quality with regards to gain and VSWR to obtain maximum
performance. Recommended antennas can be Procom CXL-2-1LW/H (0dBd), Procom CXL-2-3C/M
(3dBd) or similar. 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. The antenna
used with this radio should be installed at least 260cm away from any area where people are likely to
be.
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 switch and can be used to
connect the input of a receiver.
4.5 AC and DC connectors
Refer to section 3.4.2, 3.6.1 and 3.6.3 for voltages and connectors.
4.6 Remote signals
Several remote signals are available on the rear interfaces of the radio units.
These signals can be grouped into: Audio signals, Key signals, Data interface signals and other signals.
Note, for all interface signals, RJ45 connectors are used. As far as practically possible, the pairs used
on a standard ethernet connection are used when a signal is input/output as a pair to the radio (e.g.
audio lines). For interconnections between the transmitter and receiver, and for interconnection to a
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distribution panel with RJ45 connectors, standard Cat5E, ethernet cable should be used. This is a
good quality, screened cable, with 1 to 1 connections between the two connectors.
Below is an overview of the signals available and their primary use. Refer to chapter 3.2 and 0 for and
overview of the different connectors.
4.6.1
REM connector (receiver) and RX connector (transmitter)
4 pairs
RJ45 - Cat 5E, FTP
CABLE
TX - REM/RX
RX - REM
Pin no
Pin no
PIN NAME
DESCRIPTION
RS485+
RS485 - serial communication
RS485-
RS485 - serial communication
LINE_P
RX Audio 600ohm balanced
TX BUSY
TTL L=transmitting (RX pullup)
RX BUSY
TTL L=receiving (TX pullup)
LINE_N
RX Audio 600ohm balanced
ALARM
Alarm (TTL) I/O TRX alarm
GND
Ground
Table 4.6-1, Transceiver, transmitter – receiver interconnections
The RX connector on the transmitter unit has a special function, and is normally used only in a
“transceiver” configuration.
When connecting the signals on the transmitter RX connector with the signals on the receivers REM
connector, the following functionality is added to the transmitter and receiver:

The receiver audio line (p.3 and p.6) is input to the transmitter.
This enables the possibility to monitor the audio from the receiver from the transmitter
headphone connector, allowing only one plug to be used for a combined
headset/microphone.
In addition, it enables the possibility to use a 2 wire interface to the transmitters audio input
line for the combined transmitter and receiver audio.
Finally, it enables the functionality to monitor both the transmitted audio and the received
audio on the monitor output (TA-AUX2) line on the transmitter.

A RX Busy signal (p.5) is input to the transmitter from the receiver.
This signal signals the transmitter that the RX is busy. This is used in VDL operation.

A TX Busy signal (p.4) is output from the transmitter to the receiver.
This signal signals the receiver that the TX is busy (transmitting). This is used in VDL
operation, and to mute the receiver while transmitting (see table below).

A receiver alarm in/out is connected to the transmitter alarm in/out.
This enables the functionality that the complete transceiver (both receiver and transmitter
unit) will enter into alarm state if one of the units fails. This is useful if the complete
transceiver should be switched to a backup transceiver.

The RS485 serial lines from both units are connected in parallel.
This is useful to have only one connection point for the RS485 on the transceiver for remote
control.
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Menu path:
Interface config ►
RS485
(TX and RX)
RS485
(TX and RX)
Parameter
Range
Default
Details
Bitrate
1200 – 115200
1200
Set the bit rate to use on the RS485 port
Address
1 – 255
RS485
(TX and RX)
Protocol
Legacy |
standard
Legacy
Menu path:
RX config ►
Audio
( RX)
Parameter
Range
Default
Set the address to use on the RS485. In a
remote system using the RS485
communication port, all units that are
interconnected need to have a unique
address in order to avoid collisions and
misinterpretation of data.
The protocols are described in the data
manual.
Legacy uses a protocol where the 9. bit is
used for address recognition, this is the
protocol used on the previous radio models
(TA7450, RA7202) and is compatible with
the RACS II PC software and the RCU
remote control unit.
Standard is an eight bit protocol that uses
the multidrop capability of the RS485 bus.
For more information on protocols, refer to
the SW manual.
Details
Mute on transmit
False | True
True
Set this to true if the receiver should be
muted while transmitting. Requires that the
Tx busy signal on the transmitters RX
connector is routed to the TX busy input on
the receiver REM connector. (p.4)
Table 4.6-2, Settings associated with the transmitter - receiver interconnection
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4.6.2
Audio in/out and Line loop keying
Figure 4.6-1, Audio interfaces on the transmitter and receiver units
With reference to
Figure 4.6-1, the following audio remote signals are available on the rear connectors:

Monitor out: Monitor signal, usually connected to a recording unit.
Menu path:
TX config ►
Parameter
Range
Default Details
Audio
(TX)
Monitor output
Headset |
Monitor output
Monitor
output
Audio
(TX)
Monitor level
-80 – 10 dB
-50 dB
Set where the monitor output signal and the
received audio (if a receiver is connected) is
routed.
Can be set to the headset connector, the 600
ohm monitor line output or both.
The monitor signal is the demodulated signal
detected on the output of the transmitter.
Set the relative output level of the monitor
signal. 10dB = max output, -80dB=minimum
Table 4.6-3, Settings associated with MONITOR OUTPUT (TA – AUX1)
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
Line input, transmitter: This is the transmitter audio line input. This signal is usually
connected to a VCS system or a remote control that uses a 600 ohm line interface.
Menu path:
TX config ►
Parameter
Range
Default Details
Audio
(TX)
Input source
Auto | Line | Mic
| modgen | VoIP
Auto
Audio
(TX)
Line sensitivity
-40 – 0 dBm
1 dB steps
-17 dBm
Audio
(TX)
Line termination
OFF | 600 ohm
600 ohm
Audio
(TX)
Line mute level
OFF or
-40 to -10dBm
1 dB steps
OFF
Keying
(TX)
Source
Mic, line, txkey,
txgnd, inband
Mic, txkey
The input source determines where the audio
is applied to the transmitter.

Auto: Uses line input for when a
key signal is detected on one of
the remote connectors and mic
input if the key signal is detected
on the front panel connector.

Line: Uses the 600 ohm line
interface as the audio source

Mic: Uses the microphone input as
the audio source

Modgen: Uses the internal
modgen as audio input source – se
also Modgen frequency

VoIP: Uses the IP interface as the
audio source (availability depends
on radio specifications).
Set the sensitivity of the 600 ohm line input.
This setting determines where the VOGAD
(automatic gain control) start to operate.
Thus if it is set to -17 dBm, levels above -17
dBm will be modulated with 85% (default
setting).
For levels below -17 dBm the modulation will
decrease linearly.
Set the termination of the input line to either
OFF or 600 ohm. Normally this is set to 600
ohm, but can be set to OFF on one of the
radios, if two transmitters are connected in
parallel. This is to maintain the 600 ohm
impedance on the lines.
Below this level, the line input will be muted.
Used where noisy lines are connected to the
transmitter to avoid unnecessary noise on
the produced RF signal during periods of
silence (Automatic transmissions; VOLMET,
ATIS)
Determines what signal that will be used as
the source for keying the transmitter.
Any combinations can be set

Mic: Local PTT input from a
microphone, where the PTT is
connected to pin 4 and 8(gnd) on
the Mic/headset connector.

Line: Keying from a phantom
signal on the line input. Pin 3 and 6
on the Rem/TR connector.

Txkey: The transmitter is keyed by
an external voltage on the
TXKEY_P and TXKEY_N input
pins. Signals located on Pin 7 and
8 on the | connector.

Txgnd: The transmitter is keyed by
a signal on the TXKEY_G input pin
Signals are located on Pin 4 and 8
(gnd) on the REM/TR connector.

Inband: The transmitter is keyed
using an inband tone (see also
inband frequency and inband
sensitivity)
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Menu path:
TX config ►
Parameter
Range
Default Details
Keying
(TX)
Loop key bias
+12V, Gnd,
floating
Floating
Connects the center pin of the line input
transformer to:

Floating: The center pin is not
connected. If loop keying is used,
an external voltage must be
applied to pin 3 (REM connector)
in order to key the transmitter

Gnd: The center pin is grounded. If
loop keying is used, an external
voltage must be applied to pin 3
(REM connector) in order to key
the transmitter.

+12V: A 12V DC is supplied on pin
3(REM/TR connector). The
transmitter can be keyed with a
relay (or equivalent) that create a
DC path on the line input pin, pin 3
and 6 (REM/TR connector).
Table 4.6-4, Settings associated with LINE_INPUT (TX-REM)

Line output, receiver: This is the receiver audio line output. This signal is usually connected
to the VCS system or a remote control that uses a 600 ohm line interface.
Menu path:
RX config ►
Parameter
Range
Default
Details
Audio
(RX)
Output source
Speaker |
Headphone |
Lineout |
VoIP
Speaker,
Headphone,
Lineout
Audio
(RX)
Line output level
-40 to +10 dBm
1 dB steps
-10 dBm
The output source determines where the
received audio is output.

Line: Output audio on the 600
ohm line interface

Speaker: Output audio on the
integrated speaker.

Headphone: Output audio to a
headphone connected to the front
panel connector.

VoIP: Output audio on the IP
interface (availability depends on
radio specifications).
Set the maximum output level on the 600
ohm line output.
Table 4.6-5, Settings associated with LINE_OUTPUT (RX-REM)
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4.6.3
Other key signals
Figure 4.6-2, Key signals on the transmitter unit
In addition to the line loop keying, it is possible to key the transmitter, using several other hardware
and software options.
 TX_KEY_G
This is a signal available on the transmitter REM connector, pin 4. This signal, if connected to
GND will key the transmitter.

TXKEY_P, TXKEY_N
This is a differential signal, available on the transmitter AUX2 connector, pin 7 and 8. This
signal will key the transmitter if a voltage between 12 and 48 V is fed between them. Note
also that this is a differential signal, not connected to any ground potential inside the
transmitter, therefore the signal can be configured for both positive and negative voltage
keying (see figure).
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Menu path:
TX config ►
Parameter
Range
Default Details
Keying
(TX)
Source
Mic, line, txkey,
txgnd, inband
Mic, txkey
Determines what signal that will be used as
the source for keying the transmitter.
Any combinations can be set

Mic: Local PTT input from a
microphone, where the PTT is
connected to pin 4 and 8(gnd) on
the Mic/headset connector.

Line: Keying from a phantom
signal on the line input. Pin 3 and 6
on the Rem/TR connector.

Txkey: The transmitter is keyed by
an external voltage on the
TXKEY_P and TXKEY_N input
pins. Signals located on Pin 7 and
8 on the | connector.

Txgnd: The transmitter is keyed by
a signal on the TX_KEY_G input
pin Signals are located on Pin 4
and 8 (gnd) on the REM/TR
connector.

Inband: The transmitter is keyed
using an inband tone (see also
inband frequency and inband
sensitivity)
Table 4.6-6, Key Source settings
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4.6.4
Squelch and AGC signals, receiver unit
Figure 4.6-3, Squelch and AGC signals receiver unit

RX_BUSY (REM, p.5)
Squelch output signal that is referenced to GND.
This signal can be used to detect that the receiver is busy on a connected transmitter unit, on
a remote control or an other unit that can use this signal.
The signal polarity can be configured.

SQUELCH (AUX2, p.1 and p.2)
This signal indicates that the squelch is activated / closed.
The polarity can be configured. The output is a solid state relay, rated for maximum 100V /
100mA.

AGC_HILO_P, AGC_HILO_N (AUX2, p.3 and p.6)
This signal indicates that a signal above approximately +40 dBuV is received.
This can be used to detect if the signal comes from a collocated transmitter operating on the
same frequency or a transmission from an aircraft.
AGC VOLTAGE (AUX2, p.7)
This is an analogue output 0-5V. The output voltage is 0V for an input of xxx uV and increases
linearly with the input signal up to xxx uV where the voltage reach +5V.

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Menu path:
RX config ►
Parameter
Range
Default
Details
Squelch
SqOut output
Closed on
busy
Set the behavior of the SqOut output (AUX2,
pin 1 and pin 2).
Squelch
RxBusy output
Closed | Open |
Closed on busy|
Open on busy
Closed | Open |
Closed on busy|
Open on busy
Closed on
busy
Set the behavior of the RxBusy output
(REM, pin 5).
Table 4.6-7, Squelch output configuration
4.6.5
Alarm and Select signals transmitter and receiver
Figure 4.6-4, Alarm and select signals, transmitter
The alarm signals are outputs used to signal that the radio units has detected an alarm internally. The
Select signal is used to select or deselect (inhibit) a particular unit. By deselecting a unit, the unit will
enter into standby and can not be used for radio communication. However, all other functionality of
the radio units is operational when the radio is in the standby state.
The pinout and signals are equal on the transmitter and the receiver unit, except the ALARM (REM,
p.7) pin. This pin has a fixed +5V pull-up on the receiver, while the pull-up is configurable on the
transmitter.
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
ALARM_P, ALARM_N (AUX1, pin 1 and 2)
This is a differential signal, used to signal the alarm state. The radio can be set up with an
internal pull-up to +12V if desired.

ALARM (REM, pin 7)
Same as the signal above, but this signal is referenced to GND.

SELECT (AUX1, pin 3 and 6)
This input is connected to an optocoupler. The SELECT requires an external voltage to
operate.
One way to use the SELECT signal is in conjunction with the ALARM output signal from
another radio unit. If the ALARM signal (ALARM_P and ALARM_N) on a primary (main) radio
is connected to the SELECT_P and SELECT_N on a secondary (backup) radio, then automatic
switchover from the main to the standby radio is performed when the main radio detects an
alarm. In this mode, a pull-up is required on the ALARM output from the primary radio.
Menu path:
Interface
config ►
Parameter
Range
Default
Details
Alarm config
(TX and RX)
Alarm pin pull-up
Disabled |
Enabled
Enabled
Alarm config
(TX and RX)
Select polarity
High | Low
Low
The ALARM_OUT_P and ALARM_OUT_N
output pins on AUX1 is used to signal that
the radio has an alarm. This parameter
applies a pull up voltage to ALARM_OUT_P
when there are no alarms present. When an
alarm is detected the relay contact close.
The SELECT_IN_P and SELECT_IN_N
input pins on AUX1 can be used to select /
deselect (Standby) the radio with an
external signal (e.g. alarm from a main
radio). This setting determines if the radio
should be operational on a low select input
signal or a high select input signal.
Table 4.6-8, Alarm and Select settings, transmitter and receiver
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4.6.6
Miscellaneous signals, transmitter
Figure 4.6-5, Misc signals, transmitter

RX BUSY (SQ) (REM, pin 5)
This signal is only available when a receiver is connected with a 8 pin bus between the
transmitter RX and the receiver REM connector.
The signal is the same as the RX BUSY from the receiver, settings are done on the receiver
unit.

KEY_OUT_P, KEY_OUT_N (AUX2, pin 1 and 2)
This output can be used for external equipment that needs a key signal from the transmitter.
The key signal is available immediately after a key input is received on any of the key inputs.
Normally RF is produced only a few ms (<10ms) after a key signal is applied to the
transmitter.
If the KEY_OUT is used for external equipment that used relays for switching the RF, it is
necessary to delay the RF output, this can be done with a software setting, see below.

TXLOW_P, TXLOW_N (AUX2, pin 4 and 5)
This input is used to immediately switch the transmitter into low power. The input requires
an external pull-up to work. The low power level can be adjusted with a software setting.
Menu path:
Radio control
►
Parameter
Range
Default Details
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Menu path:
Radio control
►
Parameter
Low power level
(TX)
Range
Default Details
30 – 41 dBm
1 dB steps
41 dBm
Set the low power level of the transmitter in 1
dB steps. The low power level is the output
power of the transmitter when the transmitter
is set to low power, either by a command or
by an external input signal.
30 dBm corresponds to 1W output, 41 dBm
is 12W ouput.
Menu path:
TX config ►
Parameter
Range
Default Details
Keying
(TX)
RF delay
0 – 200 ms
0 (OFF)
This setting is useful when the transmitter is
used together with external equipment such
as T/R relays, power amplifier or other
equipment that includes RF switchover
relays.
Since the RF switching in the transmitter is
done electronically, the RF is produced in
less than 10ms after the PTT signal is
detected. It could be harmful for the external
relays if the RF is applied to them before
switchover has occurred.
In order to delay the RF carrier this
parameter should be used under such
circumstances. A reasonable setting should
be in the order of 40-50 ms.
Table 4.6-9, Misc. settings, transmitter.
4.7 Applications
4.7.1
Transceiver, local configuration
In a transceiver setup for local configuration, the mic and headset signals are interfaced to the
microphone/headset connector on the transmitter. The headphone signal can also be derived from
the headset connector on the transmitter.
Connection for local operation is shown in
Figure 4.7-1 and tab.
Figure 4.7-1, Transceiver, Local configuration, interfacing
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Step
Description
Connect an 8 wire Cat5e cable between TA-RX connector and RAREM connector.
Set the Mute on transmit to enabled (receiver)
Set Audio output source to Lineout (receiver)
Set Audio input source to mic (transmitter)
Set Monitor output to headset (transmitter)
Set Keying source to include mic (transmitter)
Connect a coax cable (RG58 or better) between the TA – Receiver
antenna connector (BNC) and the antenna input on the receiver.
Reference
4.6.1 - Pin description
5.9.2 - RX config group
5.9.2 - RX config group
5.5.2 – TX config group
5.5.2 – TX config group
5.5.2 – TX config group
3.2.2 and 3.4.1
Alternatively, use separate antennas for the TA and RA.
Other useful signals in Local configuration:
AUX1
Alarm out, Select in, RS232, +12V
TAAUX2
RA-
Key out relay, Monitor output, TX_LOW (Gas alarm) input, TXKEY
3.2.5 (transmitter AUX1) and
3.4.4 (receiver AUX1)
3.2.6 (transmitter AUX2)
Squelch out relay, AGC HILO output, AGC voltage output
3.4.6 (receiver AUX2)
RS485, Line input, Key, Squelch, Alarm
3.2.7 (transmitter REM)
AUX2
TA –
REM
Table 4.7-1, Transceiver, Local configuration
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4.7.2
Transceiver, remote configuration
In a transceiver setup for remote configuration, the audio is fed into the transmitter and the received
audio is output from the receiver on the 600 ohm lines.
The line can either be a 2 wire (2W) audio line connected to the transmitter only, or a 4 wire (4W)
interface connected to the transmitter and the receiver units.
Figure 4.7-2, Transceiver, Remote configuration with 2 wire audio interface
Step
Description
Connect an 8 wire Cat5e cable between TA-RX connector and RAREM connector.
Set Mute on transmit to enabled (receiver) – if desired
Set Audio output source to Lineout (receiver)
Set Audio input source to line (transmitter)
Set Keying source to include txkeygnd
Connect a coax cable (RG58 or better) between the TA – Receiver
antenna connector (BNC) and the antenna input on the receiver.
Reference
4.6.1 - Pin description
5.9.2 - RX config group
5.9.2 - RX config group
5.5.2 – TX config group
5.5.2 – TX config group
3.2.2 and 3.4.1
Alternatively, use separate antennas for the TA and RA.
Other useful signals in Remote configuration:
AUX1
Alarm out, Select in, RS232, +12V
TAAUX2
RA-
Key out relay, Monitor output, TX_LOW (Gas alarm) input, TXKEY
3.2.5 (transmitter AUX1) and
3.4.4 (receiver AUX1)
3.2.6 (transmitter AUX2)
Squelch out relay, AGC HILO output, AGC voltage output
3.4.6 (receiver AUX2)
RS485, Line input, Key, Squelch, Alarm
3.2.7 (transmitter REM)
AUX2
TA –
REM
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Table 4.7-2, Transceiver, Remote (2W) interface
Figure 4.7-3, Transceiver, Remote configuration with 4 wire audio interface
Step
Description
For audio line interfaces refer to the reference
Set Audio output source to Lineout (receiver)
Set Audio input source to line (transmitter)
Set Keying source to include txkeygnd ( or other signal if
desired)
Connect a coax cable (RG58 or better) between the TA – Receiver
antenna connector (BNC) and the antenna input on the receiver.
Reference
4.6.2 – Audio interface
5.9.2 - RX config group
5.5.2 – TX config group
5.5.2 – TX config group
3.2.2 and 3.4.1
Alternatively, use separate antennas for the TA and RA.
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Step
Description
Reference
Other useful signals in Remote configuration:
AUX1
Alarm out, Select in, RS232, +12V
TAAUX2
RA-
Key out relay, Monitor output, TX_LOW (Gas alarm) input, TXKEY
3.2.5 (transmitter AUX1) and
3.4.4 (receiver AUX1)
3.2.6 (transmitter AUX2)
Squelch out relay, AGC HILO output, AGC voltage output
3.4.6 (receiver AUX2)
RS485, Line input, Key, Squelch, Alarm
3.2.7 (transmitter REM)
AUX2
TA –
REM
Table 4.7-3, Transceiver, Remote (4W) interface
4.7.3
Transmitter, main / backup configuration
By connecting the alarm output from one (main) transmitter to the select input on a backup unit, it is
possible to perform automatic switching between them. In this way, if a main transmitter detects an
internal failure, it can be set up to enter into standby mode and stop transmissions. The alarm signal
will also signal to a backup unit to take over the transmit function.
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Figure 4.7-4, Main / Backup transmitter
Step
Description
Connect the alarm_out signal (p.1,2) from AUX1 on the main
transmitter to the select_in signal (p.3.6) on AUX1 on the standby
transmitter. The connection can be done via a distribution panel or
by making a special with RJ45 connectors in each end. The cables
used should be of the same quality as a CAT5E network cable and
the screen should be connected in the plugs.
Set Alarm config, Alarm pin pullup to Enabled (default)
Set Alarm config, Select polarity to Low (default)
Set the main transmitter Operation mode to Main
Set the backup transmitter Operation mode to Norm (default)
Connect separate antennas to the two transmitters.
Reference
3.2.5 – AUX1 connector
5.5.3 – Interface config group
5.5.3 – Interface config group
5.5.1 – Radio control group
5.5.1 – Radio control group
Alternatively use an external antenna change over unit (ACU) in
order to switch the antenna between the main and standby
transmitters. The antenna change over unit can be controlled by
the alarm signal on the main unit
Table 4.7-4, Main/backup configuration, transmitters
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4.7.4
Receiver, main / backup configuration
By connecting the alarm output from one (main) receiver to the select input on a backup unit, it is
possible to perform automatic switching between them. In this way, if a main transmitter detects an
internal failure, it can be set up to enter into standby mode and stop reception of signals. The alarm
signal will also signal to a backup unit to take over the receive function.
Figure 4.7-5, Main / Backup receiver
Step
Description
Connect the alarm_out signal (p.1,2) from AUX1 on the main
receiver to the select_in signal (p.3.6) on AUX1 on the standby
receiver. The connection can be done via a distribution panel or by
making a special with RJ45 connectors in each end. The cables
used should be of the same quality as a CAT5E network cable and
the screen should be connected in the plugs.
Set Alarm config, Alarm pin pullup to Enabled (default)
Set Alarm config, Select polarity to Low (default)
Set the main receiver Operation mode to Main
Set the backup receiver Operation mode to Norm (default)
Connect separate antennas to the two receivers.
Reference
3.4.4 – AUX1 connector
5.8.3 – Interface config group
5.8.3 – Interface config group
5.8.1 – Radio control group
5.8.1 – Radio control group
Alternatively use an external antenna change over unit (ACU) in
order to switch the antenna between the main and backup
receivers. The antenna change over unit can be controlled by the
alarm signal on the main unit.
The antenna connection can also be done via a pair of
main/backup transmitters.
Table 4.7-5, Main/backup configuration, receivers
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5 Operating Instructions
5.1 Introduction
To set up the transmitter and receiver units, several parameters can be selected from the
front panel. This section details how this is done and the range of all parameters.
Since the radio units contains no manual tuning points or switches, all parameters can in
principal be set from the front panel, however except in some rare occasions, most
parameters should be left at their default (factory preset) values.
There are 4 user levels that can be selected to limit the user access to certain parameters.
The user levels can be set on one of the data interface ports. There is also a way to override
the user levels, described in the technical manual.
These user levels are:
 Restricted
Limits front panel operation to selecting preset channels and adjusting
audio output levels and display appearance. Use this level when the
radio units are used from a remote position or in cases where the
user should be restricted to use preset channels only (1 – 100).
 Operation
Same as restricted, but in addition the local user has full access to
changing and storing frequencies, and to change the squelch level.
 Technician This level gives the local user access to the most used installation
specific parameters (line levels, output power, etc.) and should be
used when installing or maintaining the radio units.
 SysOp
This level gives unlimited access to all parameters within the radio
units and should be used with care.
In the following section, these symbols and abbreviations are used to explain navigation in
menus / setting of values:
 Scroll/Select switch
 Navigation button A (left button)
 Navigation button B (middle button) =
 Navigation button C (right button) =
 Clockwise
CW
 Counter Clockwise
CCW
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5.2 User menu – transmitter (Restricted access level)
Main display window in restricted mode.
Display
Description
When the transmitter is switched on, it will show the channel, the
frequency and the operation mode (FM).
Press
to navigate to the channel recall screen.
Select any channel (up to 100) that is previously stored in the radio by
rotating
. Recall selected channel with
If no channel is stored, the display will show: CH: No channels
Press
to navigate to the audio output level screen.
This setting adjusts the audio level output at the front panel
microphone/headset connector.
Rotate
CW or CCW to adjust the headset level.
Press
to navigate to the display intensity adjust screen.
This setting adjusts the intensity of the display and LED indicators.
Rotate
CW or CCW to adjust the intensity.
Press
to return to the default screen
Pressing
from the main display will bring up the menu options
available for the current user level.
Menus for user level: Restricted
For details regarding submenus, refer to chapter 5.4.
Table 5.2-1, User menu selections transmitter - restriced access level
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5.3 User menu – transmitter (Default access level)
Main display window for user levels: Operator, Technician and SysOp.
Display
Description
When the transmitter is switched on, it will show the channel, the
frequency,and the operation mode (FM).
Press
to navigate to the channel recall screen.
Select any channel (up to 100) that is previously stored in the radio by
rotating
. Recall selected channel with
If no channel is stored, the display will show: CH: No channels
Press
to navigate to the audio output level screen.
This setting adjusts the audio level output at the front panel
microphone/headset connector.
Rotate
CW or CCW to adjust the headset level.
Press
to navigate to the channel select screen.
Select channel number by rotating
CW or CCW.
Confirm new channel with
or
Confirm with
or
If the channel is already programmed, the channel may be cleared using
Press
to navigate to the display intensity adjust screen.
This setting adjusts the intensity of the display and LED indicators.
Rotate
CW or CCW to adjust the intensity.
Press
to return to the default screen
Pressing
from the main display will bring up the menu options
available for the current user level.
Menus for user level: Operator
For details regarding submenus, refer to chapter 5.4.
Menus for user level: Technician
For details regarding submenus, refer to chapter 5.4.
Menus for user level: SysOp
For details regarding submenus, refer to chapter 5.4.
Table 5.3-1, User menu selections transmitter- Operator, Technician and SysOp access levels
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5.4 Setting, information and configuration menus – transmitter
Under the menu selection from the user menu, various submenu groups are available depending on
the user level.
The submenus and details for them are shown in the tables below.
Submenu
Access level
Description
Radio control
►
SysOp, Technician
Access to operation mode, low power level, climax offset
parameters, modulation and standby settings.
SysOp
Access to configuration parameters for modulation, audio
settings, key (PTT) settings and internal calibration
settings.
SysOp
Access to configuration parameters for the ethernet interface,
RS232 port, RS485 port, various pin settings on the hardware
interface (remote connectors) and the user access level.
Bite system
►
SysOp, Technician
Displays information about active alarms and gives the
user access to internal measurements.
System info
►
All
Displays information about the firmware and hardware
release, system up-time and radio identification
TX config
►
Interface config
►
Table 5.4-1, Submenus available on the transmitter
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5.4.1 Radio control group
SysOp and Technician access levels. Refer to section 5.5.1 for details.
Figure 5.4-1, Radio control group, transmitter
5.4.2 TX config group
SysOp access level. Refer to section 5.5.2 for details.
Figure 5.4-2, TX config group, transmitter
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5.4.3 Interface config group
SysOp access level. Refer to section 5.5.3 for details.
MENU
Interface config
Access control
Set the user
access level for
local operation
Alarm config
Set pullup for the
external alarm pin
and polarity for
select signal
RS485
Set parameters for
RS485 serial
communication.
Bitrate, protocol
and address
RS232
Set parameters for
RS232 serial
communication.
Bitrate and
protocol
Language
Change the
language for local
control. Availability
varies with model
Rack
Set parameters to
identify location of
the radio:
Rack number,
Row and column
LAN
Set parameters for
ethernet (IP)
communication. IP
address, ports to
use, Gateway, etc.
Figure 5.4-3, Interface config group, transmitter
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5.4.4 Bite system group
SysOp and Technician access levels. Refer to section 5.5.4 for details.
MENU
Bite system
Alarms
Display active
alarms. Identifies
modules and
parameter with
failure.
Measurements
Measure power
levels, voltages,
currents, lock
detect, etc.
Figure 5.4-4, Bite system group, transmitter
5.4.5 System info group
All access levels.
MENU
System info
ID, FW and HW
release info.
Radio uptime.
Figure 5.4-5, System info group, transmitter
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5.5 Parameter details – transmitter
5.5.1 Radio control group
Menu path:
Parameter
Radio control
►
Range
Default Details
Operation mode
Main | Norm
Norm
Low power level
30 – 41 dBm
1 dB steps
41 dBm
Modulation
FM
FM
Alarm
On | Off
Off
Standby
On | Off
Off
A main radio will enter into standby if an
alarm is detected by the internal BITE
system.
A norm radio will continue operation (if
possible) even if a failure is detected.
In a main / standby configuration, the main
radio is set to Main and the standby radio is
set to Norm. In this way the control can
automatically be transferred to the standby
radio by using the available alarm output and
select input on the radios.
Set the low power level of the transmitter in 1
dB steps. The low power level is the output
power of the transmitter when the transmitter
is set to low power, either by a command or
by an external input signal.
30 dBm corresponds to 1W output, 41 dBm
is 12W ouput.
Select the modulation type / waveform to
use.
Availability depends on radio specifications.
This setting force the radio into alarm state
(forced alarm) if set to On.
Used for simulations, or to force a radio to
signal an alarm in order to select a backup
(standby) radio.
This setting force the radio into standby state
(forced standby) if set to On.
Used to manually set a radio to standby.
Table 5.5-1, Radio control group, transmitter
5.5.2
TX config group
Menu path:
TX config ►
Parameter
Range
Default Details
FM
Output power
30 – 47 dBm
1 dB steps
47 dBm
Set the output power for FM operation.
Max. level depends on radio model and is:

47 dBm for TA7650C
FM
Modulation
Up to ±5kHz
deviation
±5kHz
Set the deviation for FM operation.
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Menu path:
TX config ►
Parameter
Range
Default Details
Audio
Input source
Auto | Line | Mic
| modgen | VoIP
Auto
Audio
Mic sensitivity
-40 – 0 dBm
1 dB steps
-25 dBm
Audio
Line sensitivity
-40 – 0 dBm
1 dB steps
-17 dBm
Audio
Line termination
OFF | 600 ohm
600 ohm
Audio
Line mute level
OFF or
-40 to -10dBm
1 dB steps
OFF
Audio
Monitor output
Headset |
Monitor output
Monitor
output
Audio
Monitor level
-80 – 10 dBm
-50 dBm
Audio
VOGAD
Off, x-fast, fast,
norm, slow, xslow
Norm
Audio
Modgen frequency
100 – 5000 Hz
1 Hz steps
1003 Hz
Audio
Line=>Head gain
-10 to +20 dB
0 dB
The input source determines where the audio
is applied to the transmitter.

Auto: Uses line input for when a
key signal is detected on one of
the remote connectors and mic
input if the key signal is detected
on the front panel connector.

Line: Uses the 600 ohm line
interface as the audio source

Mic: Uses the microphone input as
the audio source

Modgen: Uses the internal
modgen as audio input source – se
also Modgen frequency

VoIP: Uses the IP interface as the
audio source (availability depends
on radio specifications).
Set the gain (sensitivity) for the microphone
connected to the front panel connector.
Use this setting to increase or decrease the
gain if needed. Setting depends on
microphone used.
Set the sensitivity of the 600 ohm line input.
This setting determines where the VOGAD
(automatic gain control) start to operate.
Thus if it is set to -17 dBm, levels above -17
dBm will be modulated with 85% (default
setting).
For levels below -17 dBm the modulation will
decrease linearly.
Set the termination of the input line to either
OFF or 600 ohm. Normally this is set to 600
ohm, but can be set to OFF on one of the
radios, if two transmitters are connected in
parallel. This is to maintain the 600 ohm
impedance on the lines.
Below this level, the line input will be muted.
Used where noisy lines are connected to the
transmitter to avoid unnecessary noise on
the produced RF signal during periods of
silence (Automatic transmissions; VOLMET,
ATIS)
Set where the monitor output signal and the
received audio (if a receiver is connected) is
routed.
Can be set to the headset connector, the 600
ohm monitor line output or both.
The monitor signal is the demodulated signal
detected on the output of the transmitter.
Set the relative output level of the monitor
signal.
Set the attack and decrease time of the
automatic gain control (VOGAD).

Off is used only for maintenance
purposes.
Set the frequency of the internal modulation
generator. Used in conjunction with the
Audio input source
Defines the scaling factor of the Rx Audio on
the headset output when the transmitter is
connected to a receiver.
The level is a relative value -10 to +20 dB
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Page 5-9
Menu path:
TX config ►
Parameter
Range
Default Details
Keying
Source
Mic, line, txkey,
txgnd, inband
Mic, txkey
Keying
Inband frequency
100 – 5000 Hz
1 Hz steps
5000
Keying
Inband trig level
-40 to -10 dBm
-30
Keying
TX Timeout
OFF | 15-300 s
1s steps
OFF
Keying
RF delay
0 – 200 ms
0 (OFF)
Determines what signal that will be used as
the source for keying the transmitter.
Any combinations can be set

Mic: Local PTT input from a
microphone, where the PTT is
connected to pin 4 and 8(gnd) on
the Mic/headset connector.

Line: Keying from a phantom
signal on the line input. Pin 3 and 6
on the REM connector.

Txkey: The transmitter is keyed by
an external voltage on the
TXKEY_P and TXKEY_N input
pins. Signals located on Pin 7 and
8 on the | connector.

Txgnd: The transmitter is keyed
by a signal on the TXKEY_G input
pin Signals are located on Pin 4
and 8 (gnd) on the REM
connector.

Inband: The transmitter is keyed
using an inband tone (see also
inband frequency and inband
sensitivity)
Set the frequency to be used for the inband
tone that will be used to key the transmitter.
By selected the tone frequency to use, the
transmitter will automatically calculate the
notch filter to use an insert this into the audio
path. Applicable to the line interface input
only.
The level of the tone used to key the
transmitter on the 600ohm input line.
The value is given in dBm (absolute level
related to 600 ohm). Values above the limit
will key the transmitter.
See also Keying source and Inband
frequency.
Set the timeout for the key signal. If the PTT
is pressed longer than this timeout, the
transmitter will automatically stop
transmitting. The transmitter will
automatically reset the timer when the key
signal is released.
This setting is useful when the transmitter is
used together with external equipment such
as T/R relays, power amplifier or other
equipment that includes RF switchover
relays.
Since the RF switching in the transmitter is
done electronically, the RF is produced in
less than 10ms after the PTT signal is
detected. It could be harmful for the external
relays if the RF is applied to them before
switchover has occurred.
In order to delay the RF carrier this
parameter should be used under such
circumstances. A reasonable setting should
be in the order of 40-50 ms.
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P/N: 84748 (G)
Page 5-10
Menu path:
TX config ►
Parameter
Range
Default Details
Keying
Loop key bias
Ground, +12V,
Floating
Floating
Connects the centre pin of the line input
transformer to:

Floating: The centre pin is not
connected. If loop keying is used,
an external voltage must be
applied to pin 3 (REM connector)
in order to key the transmitter

Ground: The centre pin is
grounded. If loop keying is used,
an external voltage must be
applied to pin 3 (REM connector)
in order to key the transmitter.

+12V: A 12V DC is supplied on pin
3(REM connector). The transmitter
can be keyed with a relay (or
equivalent) that create a DC path
on the line input pin, pin 3 and 6
(REM connector).
Calibrate
Ref oscillator
-127 – +128
This setting is used to fine adjust (calibrate)
the reference oscillator of the transmitter.
The full range is approximately 10 ppm. This
setting should be used with care, and only
when a calibrated frequency measuring
instrument is connected to the transmitter.
Parameter
Range
Default
Details
Access control
SysOp,
Technician,
Operator,
Restricted
SysOp
Set language
Depending on
model
English
Alarm config
Alarm pin pull-up
Disabled |
Enabled
Enabled
Alarm config
Select polarity
High to select|
Low to select
Low to
select
RS485
Bitrate
1200 – 115200
1200
Set the user access level for local control.
This setting limits the availability of some
menus, depending on the access level. In
order to set the access level from the user
interface, a special hardware key must be
inserted into the microphone/headset
connector. Details of the key is available in
chapter Error! Reference source not
ound.
Set the language to use on the user
interface. Availability of different languages
depends on specifications when ordering
the transmitter.
The ALARM_OUT_P and ALARM_OUT_N
output pins on AUX1 is used to signal that
the radio has an alarm. This parameter
applies a pull-up voltage to ALARM_OUT_P
when there are no alarms present. When an
alarm is detected the relay contact close.
The SELECT_IN_P and SELECT_IN_N
input pins on AUX1 can be used to select /
deselect (Standby) the radio with an
external signal (e.g. alarm from a main
radio). This setting determines if the radio
should be operational on a low select input
signal or a high select input signal.
Set the bit rate to use on the RS485 port
Table 5.5-2, TX config group, transmitter
5.5.3
Interface config group
Menu path:
Interface
config ►
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P/N: 84748 (G)
Page 5-11
Menu path:
Interface
config ►
Parameter
Range
Default
Details
RS485
Address
1 – 255
RS485
Protocol
Legacy |
standard
Legacy
RS232
Bitrate
1200 – 115200
115200
LAN
Address
192.168.2.1
LAN
Netmask
4 octets IP
address
4 octets IP
netmask
LAN
Default gateway
4 octets IP
address
0.0.0.0
LAN
SNMP port
1 – 65535
161
LAN
SNMP trap IP
4 octets IP
address
0.0.0.0
LAN
SNMP trap port
1 – 65535
162
LAN
SNMP trap int
0 – 60
RACK
Number
0 – 100
RACK
Row
0 – 20
RACK
Column
0–6
Set the address to use on the RS485. In a
remote system using the RS485
communication port, all units that are
interconnected need to have a unique
address in order to avoid collisions and
misinterpretation of data.
The protocols are described in the data
manual.
Legacy uses a protocol where the 9. bit is
used for address recognition, this is the
protocol used on the previous radio models
(TA7450, RA7202) and is compatible with
the RACS II PC software and the RCU
remote control unit.
Standard is an eight bit protocol that uses
the multidrop capability of the RS485 bus.
For more information on protocols, refer to
the SW manual.
Set the bit rate to use on the RS232
interface ports
IP interface address for the unit. Must be
unique on the network it connects to.
The netmask used on the IP interface.
Should correspond to the local network that
the radio is connected to.
If set different from the default, the radio unit
will send IP traffic to the default gateway if
the address is unreachable on the local
network
The input port used for SNMP commands
The default port is the global port for SNMP
commands
The IP address where SNMP traps are sent.
The address can be in the form of a unicast,
multicast or broadcast address.
The output port where SNMP traps are sent.
The default value is the global port for
SNMP traps
The interval on which an “alive” trap
(operstate) are sent to the host, if the TrapIP
and TrapPort are set. The value is given in
seconds. 0=OFF
Used to identify the location of the radio
from a remote application. Defines the rack
where the radio is located.
Used to identify the location of the radio
from a remote application. Defines the row
number in the rack. The row number is
counted from the top to the bottom of the
rack.
Used to identify the location of the radio
from a remote application. Defines the
column in the rack. The column number is
counted from the left in steps of one receiver
width or 14TE. There are 84 TE in a 19”
rack.
I.e. in a 19” frame width 6 receivers, the
receivers will have the column set to
1,2,3,4,5 or 6.
In a 19” frame width 3 transmitters, the
transmitters will have the column set to 1,3
or 5.
255.255.0.0
Table 5.5-3, Interface config group, transmitter
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Jotron AS| TR7750C: Operators Manual  Operating Instructions
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5.5.4 Bite system group
Menu path:
Parameter
Interface
config ►
TX alarm
Range
Measurements
Depends on the
alarm status of the
radio unit
Forward
Measurements
Reflected
Measurements
VSWR
0 – Forward
power
1:∞
Measurements
Modulation
Up to ± 5kHz
Measurements
Current
Measurements
PA Temp
Max 10 A when
keyed
Max 85°C
Measurements
LO level
Min. 0 dBm
Measurements
Measurements
Line level
28 Volt
Input line level
20.0 – 29.0 V
Measurements
12 Volt
11.0 – 12.8 V
Measurements
6 Volt
5.0 – 7.0 V
Measurements
5 Volt
4.5 – 5.5 V
Measurements
-5 Volt
-6.2 - -4.0 V
Measurements
3.3 Volt
2.9 – 3.6 V
Default Details
30 – 47 dBm
This option displays all active alarms in the
unit.
See section 6.1 for more info.
Displays the forward power in dBm detected
at the output of the transmitter
Displays the reflected power in dBm
detected on the output of the transmitter
Displays the calculated VSWR from the
forward and reflected measurements
Displays the measured modulation level on
the output of the transmitter [kHz]
Displays the total current consumption (28V)
of the transmitter [A]
Displays the temperature measured on the
PA module in the transmitter [°C]
Displays the level measured at the output of
the local oscillator in dBm
Displays the input line level in dBm
Displays the regulated 28V supply from the
power regulator board.
The 28V is used on the PA board.
Displays the regulated 12V supply from the
power regulator board
The 12V is used on the main board
Displays the regulated 6V on the modulator
board
Displays the regulated 5V supply from the
power regulator board.
The 5V is used on several modules
Displays the regulated -5V supply from the
power regulator board.
The -5V is used on the main board.
Displays the regulated 3.3V supply from the
power regulator board.
The 3.3V is used on several modules
Table 5.5-4, Bite system group, transmitter
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Page 5-14
5.6 User menu – receiver (Restricted access level)
Main display window in restricted mode.
Display
Description
When the receiver is switched on, it will show the channel, the frequency
and the operation mode (FM).
When the DSC dedicated receiver is switched on, it will show the DSC
channel, the DSC frequency and the operation mode (DSC).
Press
to navigate to the channel recall screen.
Select any channel (up to 100) that is previously stored in the radio by
rotating
. Recall selected channel with
If no channel is stored, the display will show: CH: No channels
Press
to navigate to the loudspeaker audio output screen.
This setting adjusts the audio level output in the integrated loudspeaker.
Rotate
CW or CCW to adjust the audio level.
Press
to navigate to the headset audio output screen.
This setting adjusts the audio level output in the integrated loudspeaker.
Rotate
CW or CCW to adjust the audio level.
Press
to navigate to the display intensity adjust screen.
This setting adjusts the intensity of the display and LED indicators.
Rotate
CW or CCW to adjust the intensity.
Press
to return to the default screen
Pressing
from the main display will bring up the menu options that
are available for the current user level.
Press
to disable / active the squelch.
Menus for user level: Restricted
For details regarding submenus, refer to chapter 5.4.
Table 5.6-1, User menu selections receiver - restriced access level
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Page 5-15
5.7 User menu – receiver (Default access level)
Main display window for user levels: Operator, Technician and SysOp.
Display
Description
When the receiver is switched on, it will show the channel, the frequency
and the operation mode (FM).
When the DRC dedicated receiver is switched on, it will show the DSC
channel, the DSC frequency and the operation mode (DRC).
Press
to navigate to the channel recall screen.
Select any channel (up to 100) that is previously stored in the radio by
rotating
. Recall selected channel with
If no channel is stored, the display will show: CH: No channels
Press
to navigate to the loudspeaker audio output screen.
This setting adjusts the audio level output in the integrated loudspeaker.
Rotate
CW or CCW to adjust the audio level.
Press
to navigate to the headset audio output screen.
This setting adjusts the audio level output in the integrated loudspeaker.
Rotate
CW or CCW to adjust the audio level.
Press
to navigate to the channel select screen.
Select channel number by rotating
CW or CCW.
Confirm new frequency with
or
Confirm with
or
If the channel is already programmed, the channel may be cleared using
Press
to navigate to the display intensity adjust screen.
This setting adjusts the intensity of the display and LED indicators.
Rotate
CW or CCW to adjust the intensity.
Press
to return to the default screen
Pressing
from the main display will bring up the menu options
available for the current user level.
Press
to disable / activate the squelch.
Menus for user level: Operator
For details regarding submenus, refer to chapter 5.4.
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P/N: 84748 (G)
Page 5-16
Menus for user level: Technician
For details regarding submenus, refer to chapter 5.4.
Menus for user level: SysOp
For details regarding submenus, refer to chapter 5.4.
Table 5.7-1, User menu selections receiver - Operator, Technician and SysOp access levels
5.8 Setting, information and configuration menus – receiver
Under the menu selection from the user menu, various submenu groups are available depending on
the user level.
The submenus and details for them are shown in the tables below.
Submenu
Access level
Description
Radio control
►
SysOp, Technician
Access to operation mode, low power level, climax offset
parameters, modulation and standby settings.
RX config
►
SysOp
Access to configuration parameters for modulation, audio
settings, Squelch settings and internal calibration settings.
SysOp
Access to configuration parameters for the ethernet
interface, RS232 port, RS485 port, various pin settings on
the hardware interface (remote connectors) and the user
access level.
Interface config ►
Bite system
►
SysOp, Technician
Displays information about active alarms and gives the
user access to internal measurements.
System info
►
All
Displays information about the firmware and hardware
release, system up-time and radio identification
Table 5.8-1, Submenus available on the receiver
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Page 5-17
5.8.1 Radio control group
SysOp and Technician access levels. Refer to section 5.9.1 for details.
Figure 5.8-1, Radio control group, receiver
5.8.2 RX config group
SysOp access level. Refer to section 5.9.2 for details.
Figure 5.8-2, RX config group, receiver
Jotron AS| TR7750C: Operators Manual  Operating Instructions
P/N: 84748 (G)
Page 5-18
5.8.3 Interface config group
SysOp access level. Refer to section 5.9.3 for details.
MENU
Interface config
Access control
Set the user
access level for
local operation
Alarm config
Set pullup for the
external alarm pin
and polarity for
select signal
RS485
Set parameters for
RS485 serial
communication.
Bitrate, protocol
and address
RS232
Set parameters for
RS232 serial
communication.
Bitrate and
protocol
Language
Change the
language for local
control. Availability
varies with model
Rack
Set parameters to
identify location of
the radio:
Rack number, row
and column
LAN
Set parameters for
ethernet (IP)
communication. IP
address, ports to
use, Gateway, etc.
Figure 5.8-3, Interface config group, receiver
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P/N: 84748 (G)
Page 5-19
5.8.4 Bite system group
SysOp and Technician access levels. Refer to section 5.9.4 for details.
MENU
Bite system
Alarms
Display active
alarms. Identifies
modules and
parameter with
failure.
Measurements
Measure power
levels, voltages,
currents, lock
detect, etc.
Figure 5.8-4, Bite system group, receiver
5.8.5 System info group
Available for all access levels
MENU
System info
ID, FW and HW
release info.
System uptime.
Figure 5.8-5, System info group, receiver
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P/N: 84748 (G)
Page 5-20
5.9 Parameter details – receiver
5.9.1
Radio control group
Menu path:
Radio control
►
Parameter
Range
Default Details
Squelch level
-10 dBuV to +30
dBuV
0 dBuV
Operation mode
Main | Norm
Norm
Modulation
FM
FM
Alarm
On | Off
Off
Standby
On | Off
Off
Squelch level
This squelch level is the level for the digital
noise compensated squelch.
A main radio will enter into standby if an
alarm is detected by the internal BITE
system.
A norm radio will continue operation (if
possible) even if a failure is detected.
In a main / standby configuration, the main
radio is set to Main and the standby radio is
set to Norm. In this way the control can
automatically be transferred to the standby
radio by using the available alarm output and
select input on the radios.
Select the modulation type / waveform to
use.
Availability depends on radio specifications.
This setting force the radio into alarm state
(forced alarm) if set to On.
Used for simulations, or to force a radio to
signal an alarm in order to select a backup
(standby) radio.
This setting force the radio into standby state
(forced standby) if set to On.
Used to manually set a radio to standby.
Table 5.9-1, Radio control group, receiver
Jotron AS| TR7750C: Operators Manual  Operating Instructions
P/N: 84748 (G)
Page 5-21
5.9.2
RX config group
Menu path:
RX config ►
Parameter
Range
Default
Details
Audio
Output source
Speaker |
Headphone |
Lineout |
VoIP
Speaker,
Headphone,
Lineout
Audio
Line output level
-10 dBm
Audio
RF AGC
-40 – +10 dBm
1 dB steps
Off, x-fast, fast,
norm, slow, xslow
Audio
AF AGC
On | Off
Off
Audio
Mute on transmit
On | Off
On
Squelch
Override level
-10 dBuV to +30
dBuV
20 dBuV
Squelch
Inband config
Off, open,
closed, both
Off
The output source determines where the
received audio is output.

Line: Output audio on the 600
ohm line interface

Speaker: Output audio on the
integrated speaker.

Headphone: Output audio to a
headphone connected to the front
panel connector.

VoIP: Output audio on the IP
interface (availability depends on
radio specifications).
The max. output level on the 600 ohm line
output.
Set the attack and release times for the RF
AGC

Off is used only for maintenance
purposes.
Set the automatic AF gain control on or off.
Setting AF AGC on will lead to constant
audio output when received signals have
varying modulation levels
Set this to On if the receiver should be
muted while transmitting. Requires that the
Tx busy signal on the RX connector on the
transmitter is routed to the TX busy input on
the receiver REM connector.
The override level where the analogue
squelch will open even if it is a “noisy”
signal. This squelch level overrides the
noise compensated squelch. Setting this
level to a lower level than the “SQ level” will
disable the noise compensated squelch
completely.
Defines the behavior of the inband squelch
signal.

Off: No inband tone is generated

Open: An inband tone is
generated when the squelch is
open (receiving)

Closed: An inband tone is
generated when the squelch is
closed (muted)

Both: Different tones are
generated depending on the
status of the squelch.
Squelch
Inband freq open
100 – 5000 Hz
1 Hz steps
5000
Squelch
Inband freq closed
100 – 5000 Hz
1 Hz steps
5000
Norm
Set the frequency to be used for the inband
tone that will be used to signal that the
squelch is open. Requires that open is
included in the Inband config setting. The
receiver will automatically notch the received
signal and insert a tone at the given
frequency.
Applicable to the line interface output only.
Set the frequency to be used for the inband
tone that will be used to signal that the
squelch is closed. Requires that closed is
included in the Inband config setting. The
receiver will automatically insert a tone at
the given frequency.
Applicable to the line interface output only.
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P/N: 84748 (G)
Page 5-22
Menu path:
RX config ►
Parameter
Range
Default
Details
Squelch
Inband level
-30 to -10
-24
Squelch
SqOut output
Squelch
RxBusy output
Closed on
busy
Calibrate
Ref oscillator
Closed | Open |
Closed on busy|
Open on busy
-127 – +128
The level of the inband tone relative to the
setting in the line level output level in dB,
Applicable to the line interface output only.
Set the behavior of the SqOut output (AUX2,
p.1 and p.2).
Set the behavior of the RxBusy output
(REM, p.5).
Calibrate
RSSI reading
-10 to +10 dB
0 dB
0, 1
Parameter
Range
Default
Details
Access control
SysOp,
Technician,
Operator,
Restricted
SysOp
Set language
Depending on
model
English
Alarm pin pullup
Disabled |
Enabled
Enabled
Set the user access level for local control.
This setting limits the availability of some
menus, depending on the access level. In
order to set the access level from the user
interface, a special hardware key must be
inserted into the microphone/headset
connector. Details of the key is available in
chapter Error! Reference source not
ound..
Set the language to use on the user
interface. Availability of different languages
depends on specifications when ordering
the receiver.
The ALARM_OUT_P and ALARM_OUT_N
output pins on AUX1 is used to signal that
the radio has an alarm. This parameter
applies a pullup voltage to ALARM_OUT_P
when there are no alarms present. When an
alarm is detected the relay contact close.
Factory preset
This setting is used to fine adjust (calibrate)
the reference oscillator of the receiver. The
full range is approximately 10 ppm. This
setting should be used with care, and only
when a calibrated frequency measuring
instrument is used to measure the frequency
of the receiver.
The exact frequency of the receiver can be
determined either by connecting a spectrum
analyzer to the antenna connector of the
receiver and measure the leakage of the LO
output (45 MHz above the operating
frequency) – or by using a radio test set to
measure the bandwidth of the receiver and
adjust until centre is on the operating
frequency.
In order to measure the RSSI level exactly,
there is a provision to calibrate the reading.
Normally the reading is within +/-2 dB
without calibration, but it can be useful if to
signals are being compared.
Writing a “1” to this parameter will reset the
receiver and restore the settings that where
set before shipping from the factory. Use
with care – all settings that has been
changed will be reset!
Table 5.9-2, RX config group, receiver
5.9.3
Interface config group
Menu path:
Interface
config ►
Alarm config
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P/N: 84748 (G)
Page 5-23
Menu path:
Interface
config ►
Parameter
Range
Default
Details
Alarm config
Select polarity
High to select|
Low to select
Low
RS485
RS485
Bitrate
Address
1200 – 115200
1 – 255
1200
RS485
Protocol
Legacy |
standard
Legacy
RS232
Bitrate
1200 – 115200
115200
LAN
Address
192.168.2.1
LAN
Netmask
4 octets IP
address
4 octets IP
netmask
LAN
Default gateway
4 octets IP
address
0.0.0.0
LAN
SNMP port
1 – 65535
161
LAN
SNMP trap IP
4 octets IP
address
0.0.0.0
LAN
SNMP trap port
1 – 65535
162
LAN
SNMP trap interval
0 – 60
LAN
VDL output IP
4 octets IP
address
0.0.0.0
LAN
VDL output port
1 – 65535
3006
Rack
Number
0 – 100
Rack
Row
0 – 20
The SELECT_IN_P and SELECT_IN_N
input pins on AUX1 can be used to select /
deselect (Standby) the radio with an
external signal (e.g. alarm from a main
radio). This setting determines if the radio
should be operational on a low select input
signal or a high select input signal.
Set the bit rate to use on the RS485 port
Set the address to use on the RS485. In a
remote system using the RS485
communication port, all units that are
interconnected need to have a unique
address in order to avoid collisions and
misinterpretation of data.
The protocols are described in the data
manual.
Legacy uses a protocol where the 9. bit is
used for address recognition, this is the
protocol used on the previous radio models
(TA7450, RA7202) and is compatible with
the RACS II PC software and the RCU
remote control unit.
Standard is an eight bit protocol that uses
the multidrop capability of the RS485 bus.
For more information on protocols, refer to
the SW manual.
Set the bit rate to use on the RS232
interface ports
IP interface address for the unit. Must be
unique on the network it connects to.
The netmask used on the IP interface.
Should correspond to the local network that
the radio is connected to.
If set different from the default, the radio unit
will send IP traffic to the default gateway if
the address is unreachable on the local
network
The input port used for SNMP commands
The default port is the global port for SNMP
commands
The IP address where SNMP traps are sent.
The address can be in the form of a unicast,
multicast or broadcast address.
The output port where SNMP traps are sent.
The default value is the global port for
SNMP traps
The interval on which an “alive” trap
(operstate) are sent to the host, if the TrapIP
and TrapPort are set. The value is given in
seconds. 0=OFF
The IP address that VDL packets received
will be sent to. Must be set in order to detect
VDLpackets.
The output port used for VDL traffic if the
VDL input source is set to IP
Used to identify the location of the radio
from a remote application. Defines the rack
where the radio is located.
Used to identify the location of the radio
from a remote application. Defines the row
number in the rack. The row number is
counted from the top to the bottom of the
rack.
255.255.0.0
Jotron AS| TR7750C: Operators Manual  Operating Instructions
P/N: 84748 (G)
Page 5-24
Menu path:
Interface
config ►
Parameter
Range
Default
Details
Rack
Column
0–6
Used to identify the location of the radio
from a remote application. Defines the
column in the rack. The column number is
counted from the left in steps of one receiver
width or 14TE. There are 84 TE in a 19”
rack.
I.e. in a 19” frame width 6 receivers, the
receivers will have the column set to
1,2,3,4,5 or 6.
In a 19” frame width 3 transmitters, the
transmitters will have the column set to 1,3
or 5.
Table 5.9-3, Interface config group, receiver
Jotron AS| TR7750C: Operators Manual  Operating Instructions
P/N: 84748 (G)
Page 5-25
5.9.4
Bite system group
Menu path:
Interface
config ►
Parameter
Range
RX alarm
Depends on the
alarm status of the
radio unit
Measurements
RSSI
-10 - +110 dBuV
Measurements
Line level
-40 - +10 dBm
Measurements
Measurements
AGC volt
Codec/Eth LD
0–5V
Lock / Unlock
Measurements
Temperature
Max 85°C
Measurements
DC current
0.1 – 0.3 A
Measurements
IF current
20 – 60 mA
Measurements
LNA current
20 – 60 mA
Measurements
LO level
Min. 15 dBm
Measurements
LO lock
Lock / Unlock
Measurements
12 Volt
11.0 – 12.8V
Measurements
6 Volt
5.0 – 7.0V
Measurements
5 Volt
4.5 – 5.5V
Measurements
3.3 Volt
2.9 – 3.6V
Measurements
AC
Present/Not
Measurements
VDL2-CO
0 – 100 %
Default Details
This menu item displays all active alarms in
the unit.
See Receiver error conditions for more
information
Displays the received signal level (RSSI) in
dbuV
Displays the level measured on the output of
the 600 ohm line interface
Displays the internal AGC voltage
Displays the status of the VCO used for the
Codec and Ethernet chips.
Displays the internal temperature measured
on the main board [°C]
Displays the total current consumption [28V]
of the receiver [A]
Displays the current consumption in the IF
(Intermediate Frequency) circuit [mA]
Displays the current consumption in the LNA
(Low noise amplifier) [mA]
Displays the level measured at the output of
the local oscillator in dBm
Displays the status of the local oscillator in
the receiver.
Displays the regulated 12V supply from the
power supply board
The 12V is used on the main board
Displays the regulated 6V on the
demodulator board
Displays the regulated 5V supply from the
power supply board.
The 5V is used on several modules
Displays the regulated 3.3V supply from the
power supply board.
The 3.3V is used on several modules
Present / Not present. Signals that AC is
present or not present at the input of the unit.
Displays the channel occupancy (CO) when
in VDL 2 mode. The value is calculated
every second, or by the interval set in VDL2CO Trap interval.
Table 5.9-4, Bite system group, receiver
Jotron AS| TR7750C: Operators Manual  Operating Instructions
P/N: 84748 (G)
Page 5-26
6 ERROR CONDITIONS AND CORRECTIVE ACTIONS
When the internal BITE (Built In Test Equipment) in the transmitter or the receiver units detects a
failure, the alarm indicator on the front panel of the unit will be lit. In addition the radio unit will
signal with an automatically generated SNMP trap message on the ethernet interface.
Details about the fault that caused the alarm are accessible for user access levels: SysOp and
Technician.
The error messages are available in two levels, first the module that has the failure will be identified,
next the user has the option to view in details what particular message that caused the alarm
condition.
In the following (LRU) refers to the Lowest Replaceable Unit – and is normally the first line
maintenance where the complete unit is replaced. (LRM) refers to the Lowest Replaceable Module
and is the module within the unit that can be replaced. The LRM level normally requires a well
equipped workshop with appropriate tools for testing and calibration.
6.1 Transmitter error conditions
Display
Description
Press
Use
from the main display to bring up the available menus.
to navigate to the Bite system menu and select by pressing
Select TX alarm
The displays shows module(s) where the BITE system has detected failures.
To view more details about the failure, select module.
Table 6.1-1, Alarm indication, transmitter navigation
Jotron AS| TR7750C: Operators Manual  ERROR CONDITIONS AND CORRECTIVE ACTIONS
P/N: 84748 (pre_F)
Page 6-1
TX alarm
PA Module
High SWR
Caused by a SWR
reading higher
than 1:3
High Current
Current
consumption is
above 10A
High
Temperature
Temperature
reading is above
+85°C
28V
12V
5V
3.3V
-5V
One of the voltage
readings is out of
range
Action:
Check antenna /
Antenna
connectors /
Antenna Cable
Action:
Replace TX unit (LRU)
PA module (LRM)
Action:
Replace TX unit (LRU)
PA module (LRM)
Action:
Replace TX unit (LRU)
PA module (LRM)
Probable cause:
Defective output
transistor
Probable cause:
Defective fan(s)
Probable cause:
Defective
component on
power regulator
board
Figure 6.1-1, Transmitter PA module, errors and corrective actions
Jotron AS| TR7750C: Operators Manual  ERROR CONDITIONS AND CORRECTIVE ACTIONS
P/N: 84748 (pre_F)
Page 6-2
TX alarm
Mod module
LO level
The LO level is
below 0dBm
LO lock detect
Synthesizer is out
of lock
6V
Failure on 6V
regualtor on mod
module
Action:
Replace TX unit (LRU)
Modulator module
(LRM)
Action:
Replace TX unit (LRU)
Modulator module
(LRM)
Action:
Replace TX unit (LRU)
Modulator module
(LRM)
Probable cause:
Defective
synthesizer circuits
/ VCO / TCXO
Probable cause:
Defective
synthesizer circuits
/ VCO / TCXO
Probable cause:
Defective 6V
regulator
modulator board
Figure 6.1-2, Transmitter Modulator module, errors and corrective actions
Jotron AS| TR7750C: Operators Manual  ERROR CONDITIONS AND CORRECTIVE ACTIONS
P/N: 84748 (pre_F)
Page 6-3
TX alarm
Main Module
Ethernet
Failure on the
ethernet controller
on the main board
Codec
SPI
RemExp
BiteADC
DSP
Front
Failure on the DSP
chip on the main
board
Failure on the
communication
link to the front
panel
Failure on one or
more ICs on the
main board
Action:
ReplaceTX unit (LRU)
Main module
(LRM)
Probable cause:
Failure on the
ethernet chip
Action:
Replace TX unit (LRU)
Main module
(LRM)
Probable cause:
Failure on the
specified chip
Action:
Action:
Replace Replace TX unit (LRU)
TX unit (LRU)
Main module
Check connections
(LRM)
to the front panel,
Probable cause:
replace front panel
Failure on the DSP
(LRM)
chip.
Probable cause:
Failure on the front
panel or
connectors betw.
front panel and
main board
Figure 6.1-3, Transmitter Main module, errors and corrective actions
Jotron AS| TR7750C: Operators Manual  ERROR CONDITIONS AND CORRECTIVE ACTIONS
P/N: 84748 (pre_F)
Page 6-4
6.2 Receiver error conditions
Display
Description
Press
Use
from the main display to bring up the available menus.
to navigate to the Bite system menu and select by pressing
Select Alarms and press
The displays shows module(s) where the BITE system has detected failures.
To view more details about the failure, select module.
Table 6.2-1, Alarm indication, receiver navigation
Jotron AS| TR7750C: Operators Manual  ERROR CONDITIONS AND CORRECTIVE ACTIONS
P/N: 84748 (pre_F)
Page 6-5
RX alarm
Power module
High
Temperature
Temperature
reading is above
+85°C
High Current
Current
consumption is
above 500 mA
12V
5V
3.3V
Action:
Replace RX unit (LRU)
Power module
(LRM).
Probable cause:
Failure on one or
more components
on the power
module.
Action:
Replace RX unit (LRU)
Power module,
Main module or RF
module (LRM).
Action:
Replace RX unit (LRU)
Power module,
Main module or RF
module (LRM)
Cause: Excessive
current
consumption in
one or more
modules.
Cause: Excessive
current
consumption or
defective voltage
regualtor.
One of the voltage
readings is out of
range
Figure 6.2-1, Receiver Power module, errors and corrective actions
Jotron AS| TR7750C: Operators Manual  ERROR CONDITIONS AND CORRECTIVE ACTIONS
P/N: 84748 (pre_F)
Page 6-6
RX alarm
RF module
LO level
The LO level is
below 0dBm
LO lock detect
Synthesizer is out
of lock
IF current
LNA current
Unnormal current
Unnormal current
consumption in the consumption in the
IF circuitry.
LNA (Low Noise
Amplifier)
Action:
Replace RX unit (LRU)
RF module (LRM)
Action:
Replace RX unit (LRU)
RF module (LRM)
Action:
Replace RX unit (LRU)
RF module (LRM)
Action:
Replace RX unit (LRU)
RF module (LRM)
Probable cause:
Defective
synthesizer circuits
/ VCO / TCXO
Probable cause:
Probable cause:
LNA transistor
Defective
broken
because of
synthesizer circuits
high
RF
input or
/ VCO / TCXO
transient caused
by lightning.
Probable cause:
Defective IF chip
on the RF board
Figure 6.2-2, Receiver RF module, errors and corrective actions
Jotron AS| TR7750C: Operators Manual  ERROR CONDITIONS AND CORRECTIVE ACTIONS
P/N: 84748 (pre_F)
Page 6-7
RX alarm
Main Module
Ethernet
Failure on the
ethernet controller
on the main board
Codec
SPI
RemExp
BiteADC
DSP
Front
Failure on the DSP
chip on the main
board
Failure on the
communication
link to the front
panel
Failure on one or
more ICs on the
main board
Action:
ReplaceRX unit (LRU)
Main module
(LRM)
Probable cause:
Failure on the
ethernet chip
Action:
Replace RX unit (LRU)
Main module
(LRM)
Probable cause:
Failure on the
specified chip
Action:
Action:
Replace Replace RX unit (LRU)
RX unit (LRU)
Main module
Check connections
(LRM)
to the front panel,
Probable cause:
replace front panel
Failure on the DSP
(LRM)
chip.
Probable cause:
Failure on the front
panel or
connectors betw.
front panel and
main board
Figure 6.2-3, Receiver Main module, errors and corrective actions
Jotron AS| TR7750C: Operators Manual  ERROR CONDITIONS AND CORRECTIVE ACTIONS
P/N: 84748 (pre_F)
Page 6-8
7 LIST OF TABLES AND FIGURES
TABLE 1.1-1, RADIO MODELS ...................................................................................................................................... 1-1
TABLE 3.1-1, MIC/HEADSET CONNECTOR, TRANSMITTER, PIN OUT..................................................................................... 3-2
TABLE 3.2-1, LAN INTERFACE CONNECTOR, PIN OUT ....................................................................................................... 3-5
TABLE 3.2-2, AUX1 CONNECTOR, TRANSMITTER, PIN OUT ............................................................................................... 3-5
TABLE 3.2-3, AUX2 CONNECTOR, TRANSMITTER, PIN OUT ............................................................................................... 3-6
TABLE 3.2-4, REM CONNECTOR, TRANSMITTER, PIN OUT ................................................................................................. 3-6
TABLE 3.2-5, RX CONNECTOR, TRANSMITTER, PIN OUT..................................................................................................... 3-7
TABLE 3.3-1, HEADSET CONNECTOR, RECEIVER, PIN OUT .................................................................................................. 3-9
TABLE 3.4-1, LAN INTERFACE CONNECTOR, PIN OUT ..................................................................................................... 3-11
TABLE 3.4-2, AUX1 CONNECTOR, RECEIVER, PIN OUT.................................................................................................... 3-11
TABLE 3.4-3, AUX2 CONNECTOR, RECEIVER, PIN OUT.................................................................................................... 3-12
TABLE 3.4-4, REM CONNECTOR, RECEIVER, PIN OUT ..................................................................................................... 3-12
TABLE 4.1-1, INSTALLATION PROCEDURES ..................................................................................................................... 4-1
TABLE 4.6-1, TRANSCEIVER, TRANSMITTER – RECEIVER INTERCONNECTIONS ......................................................................... 4-3
TABLE 4.6-2, SETTINGS ASSOCIATED WITH THE TRANSMITTER - RECEIVER INTERCONNECTION................................................... 4-5
TABLE 4.6-3, SETTINGS ASSOCIATED WITH MONITOR OUTPUT (TA – AUX1) .................................................................. 4-6
TABLE 4.6-4, SETTINGS ASSOCIATED WITH LINE_INPUT (TX-REM) ................................................................................. 4-8
TABLE 4.6-5, SETTINGS ASSOCIATED WITH LINE_OUTPUT (RX-REM) ............................................................................. 4-8
TABLE 4.6-6, KEY SOURCE SETTINGS .......................................................................................................................... 4-10
TABLE 4.6-7, SQUELCH OUTPUT CONFIGURATION ......................................................................................................... 4-12
TABLE 4.6-8, ALARM AND SELECT SETTINGS, TRANSMITTER AND RECEIVER ......................................................................... 4-13
TABLE 4.6-9, MISC. SETTINGS, TRANSMITTER. .............................................................................................................. 4-15
TABLE 4.7-1, TRANSCEIVER, LOCAL CONFIGURATION ..................................................................................................... 4-17
TABLE 4.7-2, TRANSCEIVER, REMOTE (2W) INTERFACE ................................................................................................. 4-19
TABLE 4.7-3, TRANSCEIVER, REMOTE (4W) INTERFACE ................................................................................................. 4-20
TABLE 4.7-4, MAIN/BACKUP CONFIGURATION, TRANSMITTERS........................................................................................ 4-21
TABLE 4.7-5, MAIN/BACKUP CONFIGURATION, RECEIVERS.............................................................................................. 4-22
TABLE 5.2-1, USER MENU SELECTIONS TRANSMITTER - RESTRICED ACCESS LEVEL ................................................................... 5-2
TABLE 5.3-1, USER MENU SELECTIONS TRANSMITTER- OPERATOR, TECHNICIAN AND SYSOP ACCESS LEVELS ............................... 5-3
TABLE 5.4-1, SUBMENUS AVAILABLE ON THE TRANSMITTER .............................................................................................. 5-4
TABLE 5.5-1, RADIO CONTROL GROUP, TRANSMITTER ...................................................................................................... 5-8
TABLE 5.5-2, TX CONFIG GROUP, TRANSMITTER ........................................................................................................... 5-11
TABLE 5.5-3, INTERFACE CONFIG GROUP, TRANSMITTER ................................................................................................. 5-12
TABLE 5.5-4, BITE SYSTEM GROUP, TRANSMITTER ......................................................................................................... 5-14
TABLE 5.6-1, USER MENU SELECTIONS RECEIVER - RESTRICED ACCESS LEVEL ....................................................................... 5-15
TABLE 5.7-1, USER MENU SELECTIONS RECEIVER - OPERATOR, TECHNICIAN AND SYSOP ACCESS LEVELS................................... 5-17
TABLE 5.8-1, SUBMENUS AVAILABLE ON THE RECEIVER .................................................................................................. 5-17
TABLE 5.9-1, RADIO CONTROL GROUP, RECEIVER .......................................................................................................... 5-21
TABLE 5.9-2, RX CONFIG GROUP, RECEIVER ................................................................................................................. 5-23
TABLE 5.9-3, INTERFACE CONFIG GROUP, RECEIVER ....................................................................................................... 5-25
TABLE 5.9-4, BITE SYSTEM GROUP, RECEIVER ............................................................................................................... 5-26
TABLE 6.1-1, ALARM INDICATION, TRANSMITTER NAVIGATION.......................................................................................... 6-1
TABLE 6.2-1, ALARM INDICATION, RECEIVER NAVIGATION ................................................................................................ 6-5
FIGURE 3.1-1, FRONT VIEW, TRANSMITTER UNIT, TA-7650C/25C/10C ............................................................................ 3-1
FIGURE 3.2-1, REAR VIEW, TRANSMITTER UNIT, TA-7650C/25C/10C. ............................................................................. 3-4
FIGURE 3.2-2, TRANSMITTER DC INPUT CONNECTOR, REAR VIEW ...................................................................................... 3-4
FIGURE 3.3-1, FRONT VIEW, RECEIVER UNIT, RA-7203C ................................................................................................ 3-8
FIGURE 3.4-1, REAR VIEW, RECEIVER UNIT, RA-7203C. ................................................................................................ 3-10
Jotron AS| TR7750C: Operators Manual  LIST OF TABLES AND FIGURES
P/N: 84748 (pre_F)
Page 7-1
FIGURE 3.4-2, RECEIVER DC INPUT CONNECTOR, REAR VIEW .......................................................................................... 3-10
FIGURE 3.5-1, PSU-7002, FRONT VIEW ..................................................................................................................... 3-13
FIGURE 3.6-1, POWER SUPPLY UNIT - REAR VIEW .......................................................................................................... 3-14
FIGURE 3.6-2, DC INPUT CONNECTOR, PSU ................................................................................................................ 3-14
FIGURE 3.6-3, DC OUTPUT, PSU............................................................................................................................... 3-14
FIGURE 3.6-4, AC INPUT CONNECTOR, PSU ................................................................................................................ 3-15
FIGURE 4.3-1, EXAMPLES OF VARIOUS CONFIGURATIONS.................................................................................................. 4-2
FIGURE 4.6-1, AUDIO INTERFACES ON THE TRANSMITTER AND RECEIVER UNITS ..................................................................... 4-6
FIGURE 4.6-2, KEY SIGNALS ON THE TRANSMITTER UNIT ................................................................................................... 4-9
FIGURE 4.6-3, SQUELCH AND AGC SIGNALS RECEIVER UNIT ............................................................................................ 4-11
FIGURE 4.6-4, ALARM AND SELECT SIGNALS, TRANSMITTER............................................................................................. 4-12
FIGURE 4.6-5, MISC SIGNALS, TRANSMITTER................................................................................................................ 4-14
FIGURE 4.7-1, TRANSCEIVER, LOCAL CONFIGURATION, INTERFACING ................................................................................ 4-15
FIGURE 4.7-2, TRANSCEIVER, REMOTE CONFIGURATION WITH 2 WIRE AUDIO INTERFACE ...................................................... 4-18
FIGURE 4.7-3, TRANSCEIVER, REMOTE CONFIGURATION WITH 4 WIRE AUDIO INTERFACE ...................................................... 4-19
FIGURE 4.7-4, MAIN / BACKUP TRANSMITTER.............................................................................................................. 4-21
FIGURE 4.7-5, MAIN / BACKUP RECEIVER.................................................................................................................... 4-22
FIGURE 5.4-1, RADIO CONTROL GROUP, TRANSMITTER .................................................................................................... 5-5
FIGURE 5.4-2, TX CONFIG GROUP, TRANSMITTER............................................................................................................ 5-5
FIGURE 5.4-3, INTERFACE CONFIG GROUP, TRANSMITTER ................................................................................................. 5-6
FIGURE 5.4-4, BITE SYSTEM GROUP, TRANSMITTER ......................................................................................................... 5-7
FIGURE 5.4-5, SYSTEM INFO GROUP, TRANSMITTER......................................................................................................... 5-7
FIGURE 5.8-1, RADIO CONTROL GROUP, RECEIVER ........................................................................................................ 5-18
FIGURE 5.8-2, RX CONFIG GROUP, RECEIVER ............................................................................................................... 5-18
FIGURE 5.8-3, INTERFACE CONFIG GROUP, RECEIVER ..................................................................................................... 5-19
FIGURE 5.8-4, BITE SYSTEM GROUP, RECEIVER ............................................................................................................. 5-20
FIGURE 5.8-5, SYSTEM INFO GROUP, RECEIVER ............................................................................................................. 5-20
FIGURE 6.1-1, TRANSMITTER PA MODULE, ERRORS AND CORRECTIVE ACTIONS ..................................................................... 6-2
FIGURE 6.1-2, TRANSMITTER MODULATOR MODULE, ERRORS AND CORRECTIVE ACTIONS ....................................................... 6-3
FIGURE 6.1-3, TRANSMITTER MAIN MODULE, ERRORS AND CORRECTIVE ACTIONS ................................................................. 6-4
FIGURE 6.2-1, RECEIVER POWER MODULE, ERRORS AND CORRECTIVE ACTIONS ..................................................................... 6-6
FIGURE 6.2-2, RECEIVER RF MODULE, ERRORS AND CORRECTIVE ACTIONS ........................................................................... 6-7
FIGURE 6.2-3, RECEIVER MAIN MODULE, ERRORS AND CORRECTIVE ACTIONS ....................................................................... 6-8
Jotron AS| TR7750C: Operators Manual  LIST OF TABLES AND FIGURES
P/N: 84748 (pre_F)
Page 7-2
Appendix A.
Channel
Designators
60
61
62
63
64
65
66
67
68
69
10
DSC
70
11
71
12
72
13
73
14
LIST OF MARITIME CHANNELS AND FREQUENCIES
BASE RX
MHz
BASE TX
MHz
156.000
156.000
156.025
160.625
156.050
160.650
156.075
160.675
156.100
160.700
156.125
160.725
156.150
160.750
156.175
160.775
156.200
160.800
156.225
160.825
156.250
160.850
156.275
160.875
156.300
156.300
156.325
160.925
156.350
160.950
156.375
156.375
156.400
156.400
156.425
156.425
156.450
156.450
156.475
156.475
156.500
156.500
156.525
156.525
156.550
156.550
156.575
156.575
156.600
156.600
156.625
156.625
156.650
156.650
156.675
156.675
156.700
156.700
Channel
Designators
74
15
75
16
76
17
77
18
78
19
79
20
80
21
81
22
82
23
83
24
84
25
85
26
86
27
87
28
88
BASE RX
MHz
BASE TX
MHz
156.725
156.725
156.750
156.750
156.775
156.800
156.800
156.825
156.850
156.850
156.875
156.875
156.900
161.500
156.925
161.525
156.950
161.550
156.975
161.575
157.000
161.600
157.025
161.625
157.050
161.650
157.075
161.675
157.100
161.700
157.125
161.725
157.150
161.750
157.175
161.775
157.200
161.800
157.225
161.825
157.250
161.850
157.275
161.875
157.300
161.900
157.325
161.925
157.350
161.950
157.375
157.375
157.400
162.000
157.425
157.425
Jotron AS| TR7750C: Operators Manual  LIST OF MARITIME CHANNELS AND FREQUENCIES
P/N: 84748 (pre_F)
Page 7-1


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Title                           : Operators handbook TR7750
Author                          : Otto Holm
Subject                         : Handbook
Keywords                        : Manual, Handbook, RA-7203, TA-7650, TA-7625, TA-7610
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Create Date                     : 2014:06:04 13:21:39+02:00
Modify Date                     : 2014:06:04 13:21:39+02:00
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