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PM1000II Pilot Guide & User Manual
CREW (Down Position) (ONLY version with crew, part number 11920):
Pilot and copilot are connected on one intercom channel, can hear aircraft
radio and transmit sidetone. The passengers are on a separate and independ-
ent channel. The pilot and copilot are connected to the aircraft radio and
may listen to Music #1. Passengers can continue to communicate with
themselves without disturbing the pilot and copilot and may listen to Music
#2.
2.3.1
Entertainment Mute Trip Level
The entertainment mute trip level determines what volume the aircraft radio
must be before the music mutes. This is factory adjusted. If your entertain-
ment does not mute, try increasing the volume of the aircraft radios.
2.4
Power/Transmit indicator (6)
When the PM1000II is operating, the lamp in the center will glow green.
When either pilot pushes a radio microphone key (push to talk, or P-T-T),
the indicator will change to blue (or red in units with serial number K16299
and below), signifying radio transmission.
The aircraft radio sidetone will be presented to the intercom, and heard by
the same people as the aircraft radio receiver audio.
Only the pilot pressing a P-T-T will be heard on the radio, other micro-
phones will be inhibited.
2.5
Fail-safe (1)
If any abnormal conditions occur, such as a loss of radio communication,
bypass the PM1000II by placing it in the “fail
-
safe” mode. When the
PM1000II is turned off, either by the pilot volume control (1) or by pulling
the “intercom” circuit breaker, the unit automatically enters the fail
-safe
mode. In this mode the pilot microphone input is connected to the aircraft
radio output, and the aircraft radio phones input is connected to the pilot
headphone output, enabling pilot radio communication. The copilot and
passenger' stations are inoperative.
