Operating instructions

Page 8 202-890-0402 PMA8000B Avidyne Pilot Guide
All passenger headsets are connected in parallel. Therefore, if a mon-
aural headset is plugged in to a PMA8000B Stereo installation, one
channel will be shorted. Although no damage to the unit will occur,
all passengers will lose one channel, unless they switch to the
“MONO” mode on the headset.
Intercom Modes (8)
The “ICS” pushbutton switch
on the left side of the panel pro-
vides the selection of the three
intercom modes. The descrip-
tion of the intercom mode func-
tion is valid only when the unit
is not in the "Split" mode. Then,
the pilot and copilot intercom is
controlled with the Mute button.
This button cycles through the intercom modes, from top to bottom
and then back up, ISO, ALL, Crew, ALL, and ISO. An LED shows
the active mode .
I
SO: The pilot is isolated from the intercom and is connected only to
the aircraft radio system. He will hear the aircraft radio reception (and
sidetone during radio transmissions).
While in ISO Mode, the pilot can elect to hear music #1. First, be sure
that the ISO mode is selected. Then press and hold the MON 1 button,
and then hold the ICS mode button for more than one second. The
ICS indicator will blink slowly to indicate music is present in ISO.
The music muting will follow the selected modes.
The copilot and passengers will hear the music sources as configured
by the audio panel configuration Function keys. See page 11—Smart
Function Keys for more details.
A
LL: All parties will hear the aircraft radio and intercom. Crew will
hear Entertainment 1, passengers can hear Entertainment 1 or 2. Dur-
ing any radio or intercom communications, the music volume auto-
matically decreases. The music volume increases gradually back to
the original level after communications have been completed.
C
REW: Pilot and copilot are connected on one intercom channel and
have exclusive access to the aircraft radios. Again, the music that the
crew and passengers will hear is determined by the Smart Function
Keys.