AR6201 - RT6201 - RCU6201 - AR6203
DV 14307.03 Issue 1 09/2013 Page 2-61
2.11.3 Receiver / Transmitter Operation
Power up the AR620X and tune it to a local station for a communication test.
Verify that the receiver output produces a clear and readable audio and ask
the local station for proper readability of the AR6201´s transmit signal.
Repeat this communication test with an airborne station within ≈ 20-40 NM
(Nautical Miles).
2.11.4 Antenna Check
Check the VSWR (voltage standing wave ratio) over the complete frequency band
(e.g. by using a VHF Reflection-Coefficient Meter).
The VSWR ratio should be less than 2:1 and is not acceptable when exceeding
3:1.
2.11.5 Interference Check
Check the AR620X while engine is running and all other avionics/ electrical
systems on the aircraft are powered, to verify that no significant
interference exists. Check also that the AR620X does not cause significant
interference with other systems.
The installer´s standard test procedure may be used for the interference
check and the below table can be taken as a reference.
Depending on the individual avionic systems installed in the aircraft, it
might be necessary to extend the following checklist accordingly.
Aircraft System Function
OK NOT OK
DME
Audio
Generators / Inverters
GPS System
Compass 1
ADF
VHF / NAV1 all channels
VHF / NAV 2 all channels
Marker Beacon
Motor(s)
Engine Instruments
Stormscope
Transponder
Air Data Computer
Autopilot and Servos
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