PS Engineering PMA4000 Pilot’s Guide - Manual (Page 5)

5 PMA4000 TSO Pilot Guide & User Manual
Intercom Modes
The audio selector panel has provisions for an entertainment input device.
While in the ISO (Isolate) mode, only the copilot and the two passengers
will hear entertainment device. In normal operation, whenever a person
speaks or if the aircraft radio becomes active, the music will automatically
mute and then will gradually return to the original listening level when the
radio or intercom activity ceases.
If a stereo entertainment device is used, the left and right channels can be
combined in the plug to provide full sound.
Push to talk intercom mode
In some extremely high noise environments, it may be desirable to have a
push to talk (PTT) intercom, instead of relying on voice-activation (VOX).
In the PMA4000 audio panel the PTT intercom capability is added. To op-
erate the PTT, Activate the panel-mounted VOX override switch. Then, the
ICS PTT switch on the pilot or copilot side will allow voice on the inter-
com.
Internal Recorder System (11941, only)
The PMA4000 (part number 11941) has an available internal recorder op-
tion. This stores the last 60 seconds of radio traffic from the selected COM
transceiver (the one selected for transmit).
The recorder function is automatic. Pressing the momentary switch associ-
ated with the playback, will cause the last message to played (incoming
Mode Pilot Hears Copilot
Hears
Passenger
Hears Comments
ISO A/C Radio
Pilot Sidetone
(during radio
transmission)
Copilot
Passengers
Entertainment Copilot
Passengers
Entertainment This mode allows the pilot to
communicate with the air
traffic control without the
copilot or passengers both-
ered by the conversations.
Copilot and passengers can
continue to talk and listen to
music
All Radios
Sidetone
Pilot
Copilot
Passengers
Entertainment
Radios
Sidetone
Pilot
Copilot
Passengers
Entertainment
Radios
Sidetone
Pilot
Copilot
Passengers
Entertainment
This mode allows all on
board to hear radio recep-
tion as well as communicate
on the intercom. Music and
intercom is muted during
intercom and radio commu-
nications