PS Engineering PMA6000M-S - Manual (Page 22)

PS Engineering
PMA6000 Series Audio Selector Panel and Intercom System
Installation Manual
200-066-0006 Page 3-5 Rev. 6, March 2005
3.6.5.3 Entertainment Input
The audio selector panel has provisions for up to two separate entertainment input devices. Which device is
heard is determined by the position of the three position mode switch located in the center of the intercom
section of the audio panel. (See Table 3-1 for overview.)
While in the ISO (Isolate) mode, only the copilot and the four passengers will hear entertainment device
#1. 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 intercom or radio
activity ceases.
Which entertainment device will be heard is determined by the mode selector switch. When in the A LL
mode, all parties will hear the entertainment input #1. While in the C REW mode, pilot and copilot will hear
entertainment input #1 while the passengers may listen to entertainment input #2.
It is also possible to use only one entertainment input device for both entertainment inputs. It is suggested
however, that a switch (DPDT) be installed between the single entertainment device and entertainment
input #1. This will allow the pilot and copilot decide if they hear entertainment while in the Crew mode.
Table 3-1 Intercom Modes
Mode Pilot Hears Copilot Hears Passenger Hears Comments
Isolate A/C Radio
Pilot Sidetone
(during radio transmis-
sion) Copilot and passenger
intercom
Entertainment #1 Passenger and Copilot
intercom
Entertainment #1 This mode allows the
pilot to communicate with
the ground without the
copilot or passengers
bothered by the conver-
sations. 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 #1 This mode allows all on
board to hear radio re-
ception as well as com-
municate on the inter-
com. Music and intercom
is muted during intercom
and radio communica-
tions
Crew Pilot
Copilot
A/C Radio
Entertainment #1 Copilot
Pilot
A/C Radio
Entertainment #1 Passengers
Entertainment #2 A second music source
is automatically enabled
for the passengers.
3.6.6 Push to talk intercom mode
PMA6000-series audio selector/intercom systems with serial number beginning with the letter “M” (mon-
aural version) or “G” (stereo version).
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 PMA6000 series with later configuration boards, the PTT intercom capability is added. To operate the
PTT, simply rotate the PMA6000 squelch control to maximum (fully CW). Grounding the appropriate pin
on the top connector through a momentary switch will open only that intercom channel. The pilot and copi-
lot are individually. All passenger mics are controlled with pin 20.
The same pins are used for both mono and stereo PMA6000 Systems. This applies ONLY to units with
applicable serial numbers.
3.6.7 Internal Recorder System (Option 1, only)
Beginning in mid 1999, PS Engineering has an available internal recorder option. This stores the last 60
seconds of radio traffic from the selected Comm transceiver (the one selected for transmit).