Jotron AS RA 7203 User Manual

1 DISPLAY
2 FbA (Function button A)
3 RS (Rotary switch)

RA - 7203

VHF Receiver

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

1

7

2
3
4
5

6

8

9

10
11

12

RA - 7203

Front RJ45 connector

Front Connector, RJ45

Name PIN Purpose

SEL 1
TDO 2

Headset 3
RS232 4 RS232 Tx

RS232 5 RS232 Rx
TMS 6
+12VDC 7 +12 VDC to external equipment (10mA)
GND 8 Common ground

RA - 7203

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

Technical data, 2 of 4

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

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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

RA - 7203

Menus, 1 of 16

FbA

RS

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.

FbB

FbC

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Menus, 2 of 16

There are four access user levels:

User
parameter:

1 System operator Full access to all parameters

2 Technician Access to some settings in RX

3 Operators Access only to Volume,

4 Restricted Restricted to Volume, Squelch

Name of menu: Access and restrictions:

(R/W by System Operator)

menu system + bite (R/O)

Frequency and memory store
and recall

and memory recall

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Menus, 3 of 16

When operated locally, the operator has full access to all facilities
using the various controls at the front panel.

Push RS to switch in the operator menu