Version 16.10 AF-6600 AF-5000 Series Install Manual 62
Power
To power the AF-INTERCOM-2S on and off manually, press the volume knob.
The power switch remembers its on/off state: Once the AF-INTERCOM-2S is powered on, aircraft
power can be used to turn the Intercom on and off in normal use. Therefore, the power switch need
not be used in routine operation.
LED Power/Transmit Indicator
The LED indicator light in the center of the Intercom is green when the Intercom is powered on. When
either the pilot or co-pilot PTT switch is depressed, the LED becomes orange to indicate radio
transmission.
Volume
The volume knob adjusts the audio levels of the stereo music input and pilot-to-copilot intercom
communication only. It does not adjust the volume level of aircraft radios or other devices that are
connected. Adjust the volume levels on your radios and other audio devices to achieve the desired
volume balance between all audio devices in the aircraft.
Squelch Adjustment
The AF-INTERCOM-2S has voice-activated (VOX) microphone channels to reduce background noise
from the aircraft when no one is speaking. When either the pilot or co-pilot speaks into their headset,
their microphone channel is activated, allowing them to be heard by the other person. The
microphone audio level that is required to activate a microphone channel is adjusted with the squelch
knob.
Adjust squelch with the engine running:
First, while no one is talking, turn the squelch knob until you hear background noise in your headset.
Next, adjust the squelch until you no longer hear background noise.
Finally, with the microphone very near your lips, talk to confirm that normal speech levels activate the
microphone. The VOX feature will automatically close the microphone after you finish speaking.
To reduce background noise, the pilot and co-pilot microphones are activated individually.
Front Music In Jack
The AF-INTERCOM-2S has wiring provisions for a permanent stereo music source via its rear-mounted
wiring connector.
A music device can also be plugged in to the standard 3.5mm Music In jack on the front of the
intercom. When a device is plugged in to the Music In jack, it over-rides the permanent music input.
Muting Inputs
Whenever a radio or other non-muting input has audio activity, music and muting input volume is
immediately decreased to near fully-muted so that you may hear important radio transmissions or
audio alerts. When audio from radios/non-muting inputs ceases for a moment (.5 second), volume
levels are automatically restored gradually over the next second.
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