Technical data

VHF/AM RADIO FSG 2T

4 Recommended Set-up Sequence

June 2014 FAV_D10048 47

4.4 If applicable – check the Intercom Mode

IMPORTANT!

 Before testing the Intercom Mode, the microphone sensitivity should be

adjusted correctly (refer to § 4.2).

 Intercom is only possible when using headphones/headsets.

 The characteristic of the headphones should be identical.

To check the Intercom Mode, switch ON the panel mounted Intercom switch. This

activates the Intercom capability, while the A/C speaker is disabled.

There are two operating modes of Intercom:

4.4.1 FSG 2T without AF External capability:

Intercom Voice / VOX controlled: at a sufficient voice volume (MIC signal) the

threshold opens and intercommunication takes place. This feature is only available when

the optional AF External Function is disabled (default setting).

 Without RX signal, speak loud, clear and close into the microphone of the first

headset.

 Listen to the earphone of the headset and observe the TX/RX LED on the front panel.

Your voice should be clearly audible in the earphone when the TX/RX LED change

from clear to steady GREEN. Turn VOL knob to adjust Intercom audio volume.

 Stop speaking; after approximately one second the radio switches back to Standby

(TX/RX LED is clear).

 If signals are received during Intercommunication, the Intercom audio volume is

reduced by half to increase the intelligibility of the reception.

 While receiving the TX/RX LED is steady GREEN.

 Repeat the test above using microphone of the second headset.

4.4.2 FSG 2T with AF External capability:

Intercom continuously: Both MIC inputs are continuously open. Any MIC signal is

therefore amplified and audible through the headphones, also cabin noise. This Intercom

operating Mode is available when the AF External input is enabled by an approved

Avionics workshop.