Technical data

VHF/AM RADIO FSG 2T
6 Operation
June 2014 FAV_D10048 63
6.6 VOX Intercom
IMPORTANT!
 When the Option AF EXTERNAL was activated by an approved
Avionics workshop voice controlled Intercom is not possible!
 The built-in VOX voice controlled microphone threshold control will mute
microphones during speech pauses.
 Intercom headset audio volume may be adjusted through installation and
should also include, if applicable, the individual earphone volume
adjustments on the headset phone capsule.
1. Switch ON Intercom. This activates the microphone VOX capability, while the
speaker is disabled.
2. In Receive Mode, through acoustic accessories (earphones with microphones), the
FSG 2T allows voice-activated intercommunications between pilot(s) and / or other
crew members. Always speak loud and clear, while the microphone opening is
located close to the lips.
3. The Intercom audio volume may be adjusted by setting the front panel VOL knob.
4. Once a suitable mike signal opens the VOX, it will stay open one further second after
the last spoken syllable, and then closes the mike inputs.
5. When Receiving, the Intercom audio is reduced in volume by 6 dB / half level. This
allows safer listening to the Receive signal.
6. By pressing the PTT key the radio switches to transmit – without switching OFF the
Intercom – but disables the VOX threshold temporarily. The transmitter modulation
Sidetone is audible in all connected headphones. The TX/RX LED on the front panel
flickers according to the speech volume. This also allows optical monitoring of
transmission quality (time constant controlled).
7. Releasing the PTT key turns the radio into VOX Intercom Mode again.