3
PMA7000M Pilot Guide
202-780-0604
The PMA7000M gives priority to the pilot’s PTT. If the copilot it transmit-
ting, and the pilot presses his PTT, the pilot’s microphone will be heard
over the selected com transmitter.
The PMA7000M-Series has
an automatic selector mode.
Audio from the selected
transceiver is automatically
heard in the headsets and
speaker (if selected). You
can check this function by
switching from C
OM
1 to
C
OM
2 and watch the se-
lected audio light on the selector change from COM 1 to COM 2. This en-
sures the pilot will
always
hear the audio from the transceiver he is trans-
mitting on.
When switching from C
OM
1 to C
OM
2, while C
OM
2 audio had been se-
lected, Com 1 audio will continue to be heard. This eliminates the pilot
having to switch Com 1 audio back on, if desired.
When switching from C
OM
1 to C
OM
2 while Com 2 has NOT been se-
lected, Com 1 audio will be switched off. In essence, switching the mic
selector will not effect the selection of Com receiver audio.
Swap Mode (Switch from Com 1 to Com 2 remotely)
With a yoke mounted, momentary switch, the pilot can change from the
current Com transceiver (Com 1, 2, or 3) 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.
Audio Selector
Receiver audio is selected through seven momentary, push-button, backlit
switches. You will always hear the audio from the transceiver that is se-
lected for transmit.
The users can identify which receivers are selected by noting which of the
green button LEDs are illuminated. Push buttons labeled
Nav 1
,
Nav 2
,
MKR
(Marker),
AUX
(auxiliary), and
SPR
(Speaker) are momentary type
switches. When one of these buttons is pressed, the receiver audio becomes
active, and the LED will illuminate. Press the switch again and it turns off
removing that receiver from the audio.
Speaker Amplifier
The "
SPR
" push-button section stands for speaker. This switch will place
all selected audio on the cockpit speaker when this switch is activated. The
speaker amplifier will present the audio sources selected by the pilot, in
“Split Mode." Unswitched audio, (autopilot disconnect, altimeter warning,
