Jotron AS RA-7203 VHF AM Receiver User Manual YOUR COMMUNICATION PARTNER
Jotron AS VHF AM Receiver YOUR COMMUNICATION PARTNER
user manual
RA - 7203
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1 DISPLAY
2 FbA (Function button A)
3 RS (Rotary switch)
4 SQUELCH LED
5 REMOTE LED
6 FRONT CONNECTOR
7 FbB (Function button B)
8 FbC (Function button C)
9 ON/OFF
10 ALARM LED
11 STANDBY LED
12 LOUDSPEAKER
VHF Receiver
RA - 7203
Front RJ45 connector
Front Connector, RJ45
Name PIN Purpose
SEL 1
TDO 2
Headset 3
RS232 4RS232 Tx
RS232 5RS232 Rx
TMS 6
+12VDC 7+12 VDC to external equipment (10mA)
GND 8Common ground
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Technical data, 1 of 4
Standards; ICAO annex 10, EN300 676(AM, AM-MSK),
EN301 841(VDL2 – Physical layer)
Environmental: Temperature range -20°C to +55°C (operating) -
40°C to +70°C (storage) Humidity 90% @+40°C
(non condensing)
Shock Transport: IEC-721-3-2, Class 2M3
Vibration Transport: IEC-68-2-32, Class 2M3. IEC-68-2-6
EMC EN 301 489 – part 22
Weight: 1.7 kg
Dimension: 71mm (14TE)(W) * 230mm(D) * 128mm (H)
RA - 7203
Frequency response: 300-3400 Hz 350-2500 Hz
Data ports: RS232, RS485, 100/10BaseT
Protocol: (SNMP v.2) Simple Network Management
RS232/RS485 Jotron proprietary
BITE monitoring: VSWR, Voltages, Currents, Levels, Lock
detect, Temperature, Output power, Reflected
power, a.o.
Supply voltage: AC 115/230VAC +15/-10% / 50-60Hz Supply
voltage, DC 21.6 - 31.2VDC negative ground
MTBF: >10 years / unit
MTTR: <30 minutes at lowest replaceable unit
Technical data, 2 of 4
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Technical data, 3 of 4
Receiver AM 25kHz AM 8.33kHz
Sensitivity analogue @1μV / 30% pd: 10dSINAD(CCITT)
Adjacent channel rejection: >70dB >60dB
Intermodulation (3 signal): >70 dBc
IF bandwidth: +/- 11kHz +/-2.8kHz
Image and IF frequency response: >110 dB
Squelch operation: Adjustable 107dBm, 30dB
S/N + carrier override
Activation time <20ms
Hysteresis <3dB
Audio AGC: 30%-90%, <1dB variation
Noise blanker: IF: Selectable ON/OFF
Signal / Noise: >45dB on any output @100μV,
30%
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Technical data, 4 of 4
AGC range: -107dBm to +5dBm
AGC attach time: <50ms
AGC decay time: <200ms
Inband squelch signal: Configurable tones: 150-3400Hz
Line output: 600Ω, -36 - +7dBm @90%
modulation
Harmonic distortion: <3% @90% AM (line output)
Crossmodulation: >85dB @ 100 kHz frequency offset
Blocking: >100dB @1MHz offset, >110 dB out
of band signals
Dynamic range: >110dB
Spurious response rejection: >90dB
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Menus, 1 of 16
FbA
RS
FbB
FbC
NOTE!
RS can be pressed and turned.
The radio is controlled through an advanced menu system.
The access for each menu is restricted by a user parameter.
The System Operator can change all user parameters from SNMP, or
from the menu using a hardware key.
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Menus, 2 of 16
User
parameter: Name of menu: Access and restrictions:
1System operator Full access to all parameters
(R/W by System Operator)
2Technician Access to some settings in RX
menu system + bite (R/O)
3Operators Access only to Volume,
Frequency and memory store
and recall
4Restricted Restricted to Volume, Squelch
and memory recall
There are four access user levels:
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Menus, 3 of 16
Push RS to switch in the operator menu
When operated locally, the operator has full access to all facilities
using the various controls at the front panel.
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Menus, 4 of 16
Push menu button to enter MAIN MENU
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Menus, 5 of 16
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Menus, 6 of 16
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Menus, 7 of 16
RX config subtree menu, 1 of 2
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Menus, 8 of 16
RX config subtree menu, 2 of 2
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Menus, 9 of 16
Interface config subtree menu, 1 of 2
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Menus, 10 of 16
Interface config subtree menu, 2 of 2
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Menus, 11 of 16
Bite system subtree, 1 of 2
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Menus, 12 of 16
Bite system subtree, 2 of 2
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Menus, 13 of 16
To maneuver in the menu systems, use the up-button FbA,
the down-button FbB or (preferably) turn the RS.
The different submenus are selected by pressing the rotary
switch and turning up/down until the desired menu is
reached. (FbA, FbB and FbC may be used as well)
To return to previous menu, press RS (or FbC) when “ ,,,” is
selected in the present menu.
The RA-7203 will enter the Operator menu when turned
“ON”.
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Menus, 14 of 16
Operator menu, 1 of 3
PressRS
Press RS
Press RS
Normal operating display with active
squelch. Press Fb C to mute squelch.
Normal operating display with no channels
stored. Press Fb C to recall stored channels.
Set loudspeaker volume by turning RS.
Press FbC to mute loudspeaker.
Set headset volume by turning RS.
Press FbC to mute headset.
Press RS
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Menus, 15 of 16
Operator menu, 2 of 3
Press RS
Press RS
Press RS
Set squelch level by turning RS.
Press FbC to mute squelsh.
See next page how to select frequency.
Press FbC to store new frequency on specified
channel. Select storing channel by turning RS.
Select brightness level by turning RS.
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Menus, 16 of 16
Operator menu, 3 of 3
Press FbA
Press FbA
Press FbC
Select 8,33kHz steps by turning RS. For no changes
press FbC.
Select 100kHz steps by turning RS.
Select 1MHz steps by turning RS.
Press FbC to store new frequency and return.
RA - 7203
Rear RJ45 connectors, 1 of 5
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3
4
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6
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8
1 ANTENNA CONNECTOR
2 EARTH TAG
3 DC INPUT CONNECTOR
4 AC INPUT CONNECTOR
5 LAN CONNECTOR
6 AUX 1 CONNECTOR
7 AUX 2 CONNECTOR
8 REMOTE CONNECTOR
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LAN interface connector
Name PIN Purpose
LAN_TXP 1Tx data
LAN_TXN 2Tx data
LAN_RXP 3Rx data
LAN_D3P 4Optional
LAN_D3N 5Optional
LAN_RXN 6Rx data
LAN_D4P 7Optional
LAN_D4N 8Optional
Rear RJ45 connectors, 2 of 5
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Aux 1 connector
Name PIN Purpose
ALARM_P 1Alarm out – rele
ALARM_N 2Alarm out – rele
Select_in_P 3Select in – opto isolated
RS232_S 4RS232 Send data
RS232_R 5RS232 Receive data
Select_in_N 6Select in – opto isolated
+12V 712V output to ext
equipment (D/O: 200mA)
GND 8Common ground
Rear RJ45 connectors, 3 of 5
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AUX 2 connector
Name PIN Purpose
Squelch_out_P 1Squelch out - opto isolated
Squelch_out_N 2Differential – opto isolated
AGC_HILO_P 3Hi / Lo depending on input signal
(configurable)
NC 4
NC 5
AGC_HILO_N 6Differential – opto isolated
AGC_ OUT 7
NC 8
Rear RJ45 connectors, 4 of 5
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REM connector (Interface to transmitter)
Name PIN Purpose
RS485_Z 1RS485 (-)
RS485_Y 2RS485(+)
LINE_P 3Diff. line output from RX, 600 ohm
TX_BUSY 4TX Busy indicator input (Mute input)
RX_BUSY 5RX Busy indicator output (Repeater Key
Output – Tx in repeater mode)
LINE_N 6Diff. line output from RX, 600 ohm
ALARM 7Low=Alarm
(Note: I/O – low input will also be recognized
as an alarm (EXT))
GND 8Common ground
Rear RJ45 connectors, 5 of 5
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External wiring
RJ45 KRONE