AIRCRAFT FLIGHT
MANUAL
BRISTELL B23
Document No.: ADXC-73-001-AFM
Non-approved page
Revision: A2
7-51
Date of Issue: 15.04.2021
7.14.6 Intercom
A PM3000 Intercom is installed.
Basic operations
The volume control knob adjusts the loudness of the intercom and does
not affect the volume level of the aircraft radio. By turning the control
clockwise, the audio level will increase simultaneously.
With the engine running, set the squelch control knob by slowly rotating
the squelch control knob clockwise until you no longer hear the
background noise in the earphones. When the microphone is positioned
properly near the lips, normal speech levels should open the channel.
When you have stopped talking, there is a delay of about one half
second before the channel closes. This prevents squelch closure
between words, and helps eliminate choppy intercom conversations.
Both pilot and copilot have transmit capabilities over the radio. The
PM3000 only allows the voice of the person who presses their PTT
(Push To Talk) to be transmitted over the aircraft radio. If both pilot and
copilot press the PTT at the same time, the copilot will override. When
either pilot or co-pilot presses PTT, all other microphones are disabled.
The pilot can regain priority by switching the unit off.
Mode ISO (Isolate): The pilot is isolated from the intercom and is
connected only to the aircraft radios. He will hear the aircraft radio
reception (and sidetone during radio transmissions).
Mode ALL: Pilot and Co-pilot hear each other and a/c radio
Pressing the squelch knob mutes the Entertainment Input (unused
feature). Pressing the Volume knob switches the intercom on/off.