PS Engineering PMA6000M-C Pilot’s Guide - Manual (Page 4)

4 202-066-0002 Rev. 3, August 2007
(PTT), will be heard over the aircraft radio. Turning the rotary
switch to the C
OM 2 position will place pilot and copilot on
Com 2.
The PMA6000-Series has an automatic selector mode. Audio
from the selected transceiver is automatically heard in the
headsets and speaker (when selected). You can check this
function by switching from C
OM 1 to C OM 2 and watch the
selected audio light on the selector change from C1 to C2. This
ensures the pilot will never transmit on a radio that he is not
listening to.
When switching the mic selector rotary switch from C OM 1 to
C OM 2, while C OM 2 audio had been selected, 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 selected, Com 1 audio will be switched off. In essence,
switching the mic selector will not effect the selection of Com
audio.
Placing the mic selector switch in the C OM 3 position connects the
pilot and copilot to that radio. This is similar to C OM 1 and C OM 2,
except that the swap mode is not active.
Important: When the mic selector is in the full counter clock-
wise position, the PMA6000 power is removed, and it is in the
FAIL - SAFE mode. The pilot headset and microphone are con-
nected directly to Com 1.
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 to the other by depressing
this switch. When "Swap Mode" is active, an LED annunciator
will illuminate, indicating that the Mic Selector switch position
is no longer valid. To cancel "Swap Mode," the pilot may ei-
ther press the yoke mounted switch again, or turn the Mic Se-
lector Switch to the Com that is active.