Operating instructions

Page 6 Rev. 3
PMA8000B MP3 for Avidyne Entegra R9
lected. Except for the unswitched audio, the speaker amplifier is not
active in the "Split Mode”.
Unswitched audio 1, 3 and 4 (the inputs dedicated to autopilot discon-
nect, altimeter warning, etc.) may come through the speaker regard-
less of the speaker mode.
Depending on installation, important audio annunciations such as ra-
dar 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 present if the SPR button is selected. Consult
your avionics installer for these impor-
tant configuration details.
Public Address Function
To access PA function, press the Mute
and SPR buttons simultaneously. The
Mute and SPR LEDs will blink to indi-
cate 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 three individual signal processors, the
ambient noise appearing in all six 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 mo-
ments.
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 par-
allel 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 In-