PS Engineering PMA9000EX Installation Manual - Manual (Page 21)

PS Engineering
PMA9000EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-920-0000 Page 3-2 Rev. 9, Jan. 2011
above the Com 2 transmitter pushbutton turns green. This guarantees that the pilot will always hear the
audio from the transceiver selected for transmit.
The PMA9000EX “remembers” the receiver selection, so that when switching transmitters from C OM 1 to
C OM 2, if C OM 2 audio was previously selected, C OM 1 audio will continue to be heard. This eliminates
the pilot having to switch Com 1 audio back on, after changing transmitters.
When switching from C OM 1 to C OM 2 while Com 2 was not previously selected, C OM 1 audio will be
switched off. In essence, switching the mic selector will not override prior selection of COM receiver au-
dio.
In normal (not split) modes, the PMA9000EX gives priority to the pilot’s radio Push-To-Talk (PTT). If
the copilot it transmitting, and the pilot presses his PTT, the pilot’s microphone will be heard over the
selected com transmitter.
3.3.1.1 Split Mode
The split mode can be activated at any time by pressing the C1 and C2 XMT buttons at the same time.
This places the pilot on C OM 1 and the Copilot on C OM 2.
Pilot on C OM 2 and Copilot on C OM 1 is not possible.
NO T E
Due to the nature of VHF communications signals, and the size constraints in general aviation aircraft , it
is probable that there will be some bleed-over in the Split mode, particularly on adjacent frequencies. PS
Engineering makes no warranty about the suitability of Split Mode in all aircraft conditions.
3.3.1.2 Swap Mode (Switch from Com 1 to Com 2 remotely)
With a yoke mounted, normally open momentary switch, the pilot can change from the current Com
transceiver to the other by depressing this switch. To cancel "Swap Mode," the pilot may either press the
yoke mounted switch again, or select a different Com with the XMT buttons.
3.3.2 Internal Recorder
The PMA9000EX comes equipped with an internal recorder. This digital system stores the last incoming
audio from the radio you have selected for transmit. It can store as many of 16 incoming messages, and up
to 30 seconds of audio. The pilot and copilot hear the playback. It is also possible to modify the unit to
exclude the copilot from the playback, and annunciation playback. Contact PS Engineering, for more d e-
tails.
3.3.2.1 Playback
Recording is automatic. To play back the message, press and hold the XMT button for the communica-
tions radio that is selected for transmit for about 1 second or until the message plays back.
To stop the, hold the same button until the playback stops, about 2 seconds. Then the next 1 -second press
will play the next earlier message stored.
The playback will stop automatically when the selected com audio becomes active again. Press the button
again to start the message again. The audio received during playback is NOT stored.
Figure 3-2 Playback Controls