Post Installation Tests; Mechanical Installation And Wiring Check; Power Supply; Receiver / Transmitter Operation - Becker AR6201 Installation And Operation Manual

2.10.6 /PWR_EVAL
The AR6201-(X0X) provides on pin P1-24 a low signal when the unit is
switched on and a high impedance signal, when switched "OFF".
This function is different to the AR4201, which provides supply voltage
out when switched "ON" and no supply voltage when switched "OFF".
If it is intended to switch "ON" and switch "OFF" a slaved equipment
together with the AR6201-(X0X) connect a relay on pin P1-24 as shown in
Figure 2-5.

2.11 Post Installation Tests

Note: It is assumed that the "Installation Setup" (refer Chapter 2.8)
has been done before the Post Installation Tests will be carried
out.
Once the AR6201-(X0X) is installed, complete a test procedure to verify
proper system operation. Ensure compliance with authority required
procedures. Refer to the Installation Order of the Minor Change document
or use an own approved test protocol for VHF-COM units. The following
chapter below provide guidance for such tests.
Refer to section 3 of this manual for detailed operating instructions.

2.11.1 Mechanical Installation and Wiring Check

Verify all cables are stored securely and shields connected properly to
signal ground. Check the movement of aircraft controls to verify there
is no interference. Verify all screws are tight well which keep the
AR6201-(X0X) in the installation cut out and the connectors on the rear
side of the unit are secured.

2.11.2 Power Supply

Check the power supply lines for correct polarity. Check that the
aircraft power supply is within the specified limits, with and without a
running engine (refer chapter 1.6.1).

2.11.3 Receiver / Transmitter Operation

Power up the AR6201-(X0X) 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 in an radius between ≈ 20-40 NM.
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.
Refer chapter 2.12 for further guidance.
2.11.5 Interference Check
Check the AR6201-(X0X) 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 AR6201-(X0X) does
not cause significant interference with other systems.
The installers 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.
DV 14300.03/.04 Issue 5 5/2013
AR6201-(X0X)
Page 2-37