Specifications

PS Engineering
PMA7000M-S Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual for Civil Air Patrol
200-072-0004 Page 3-7 Rev. 4, Sept. 2000
Table 3-3 Intercom Modes
Mode Pilot Hears Copilot Hears Passengers Hear Comments
Isolate A/C Radios
Pilot Sidetone
(during radio
transmission)
Entertainment 1 is
Muted
Copilot and passenger
intercom
Entertainment #1
Passenger and Copilot
intercom
Entertainment #2
This mode allows the
pilot to communicate
without the others
bothered by the
conversations. Copilot
and passengers can
continue to communicate
and listen to music
All Pilot
Copilot
A/C Radio
Passengers
Entertainment #1
Copilot
Pilot
A/C Radio
Passengers
Entertainment #1
Passengers
Pilot
Copilot
A/C Radio
Entertainment #2
This mode allows all on
board to hear radio
reception as well as
communicate on the
intercom. Music and
intercom is muted during
intercom and radio
communications
Crew Pilot
Copilot
A/C Radio
Entertainment #1
Copilot
Pilot
A/C Radio
Entertainment #1
Passengers
Entertainment #2
This mode allows the
pilot and copilot to
concentrate on flying,
while the passengers
can communicate
amongst themselves.
3.7 P-T-T Intercom Mode
In high noise environments the PMA7000MS can be set to a push to talk intercom. A PTT
enable switch and individual PTT buttons must be installed. See section 2.4.13.
3.8 Marker Beacon (PMA7000M-S)
The optional Marker Beacon Receiver uses visual and audio indicators to alert you when the
aircraft passes over a 75 MHz transmitter.
The Blue lamp, labeled "O," is the Outer Marker lamp and has an associated 400 Hertz 'dash'
tone. The lamp and tone will be keyed at a rate of two tones/flashes per second when the
aircraft is in the range of the Outer Marker Beacon.
The Amber lamp, labeled "M," is the Middle Marker lamp and is coupled with a 1300 Hertz
tone. It is keyed alternately with short 'dot' and long 'dash' bursts at 95 combinations per
minute.
The White lamp, labeled "I," is the Inner marker and has a 3000 Hertz 'dot' tone. The lamp and
tone will be keyed at a rate of six times per second.
The audio from the Marker Beacon Receiver can be heard by selecting the "M" push-button
switch. To adjust the volume level, there is a service adjustment located on the top of the unit.
See Section 2.5