PS Engineering PMA8000SR Pilot’s Guide - Manual (Page 5)

202-880-0000 Page 5 R5 PMA8000-SR Pilot Guide
Depending on installation, important audio annunciations such as radar altimeter
or autopilot disconnect will come over the speaker even if it is not selected,
while other unswitched, but muted inputs, such as GPS alerts, will only be pre-
sent if the SPR button is selected. Consult your professional avionics installer
for these important configuration details.
Public Address Function
The public address function is not enabled when
shipped from the factory. To enable this function,
press the numbers 3, 0, 0 on the SIRIUS remote
controller. The audio panel will then control this
function. Once enabled , to control PA function,
press the Mute and SPR buttons simultaneously. The Mute and SPR LEDs
will blink to indicate the audio panel is in PA mode. The copilot can continue
to use the selected com radio while the pilot will now be heard over the speaker.
To exit PA mode, push Mute and SPR again.
Intercom Operation
IntelliVox® VOX-Squelch
No adjustment of the IntelliVox® squelch control is necessary. There is no field
adjustment. Through individual signal processors, the ambient noise appearing
in all microphones is constantly being sampled. Non-voice signals are blocked.
When someone speaks, only their microphone circuit opens, placing their voice
on the intercom.
The system is designed to block continuous tones, therefore people humming or
whistling in monotone may be blocked after a few moments.
For consistent performance, any headset microphone must be placed
within ¼-inch of your lips, preferably against them. (ref: RTCA/DO-214,
1.3.1.1 (a)). It is important to have the microphone element parallel to
your mouth, and not twisted inside the cover.
It is also a good idea to keep the microphone out of a direct wind path.
Moving your head through a vent air stream may cause the IntelliVox® to
open momentarily. This is normal.
The IntelliVox® is designed to work with normal aircraft cabin noise lev-
els (70 dB and above). It loves airplane noise! Therefore, it may not rec-
ognize speech and clip syllables in a quiet
cabin, such as in the hangar, or without the
engine running. This is normal.
Intercom Volume Control (7)
The small volume control knob adjusts the loud-
ness of the intercom for the pilot and copilot. It has
no effect on selected radio levels, music input lev-