Operating instructions

Page 12 202-890-0602 PMA8000MP3 Pilot Guide
Looking at the front panel you’ll notice that the TEL, Aux, Mute and
SPR buttons have “Function” assignments.
To use these function keys A, B, C – press and hold “F” and then
press the desired key, “A” “B” or “C”. If making multiple changes,
you must release the Shift button between function changes.
There are three special functions. Function Button “A” is related to
the intercom function, and allows the crew to mute passengers’ inter-
com feed when radios are active.
Function Buttons “B” and “C” control how music is distributed in
your airplane.
There are two music sources available to the PMA8000B MP3. Music
1 input can be either on the front jack, OR the Music 1 input at the
rear connector (Pins 23 and 24, J2). Music 2 is wired into the rear
connector, only (Pins 26 and 27, J2)
The volume of the audio annunciations and recorder playback can be
adjusted through a hole on the top of the unit marked “ANN VOL.”
Function “A”
Function “A” controls the distribution of aircraft radio within the in-
tercom, as well as passenger intercom muting. In the “standard inter-
com function” mode, aircraft radios are distributed to all, when the
intercom is in the ALL mode. In CREW mode, only the pilot and co-
pilot positions will hear aircraft radios.
Function A
AUX
Function B
MUTE
Function C
SPR
Intercom Mode Music 1
Propagation
Music Distribution
State 1 State 2 State 1 State 2
State 1
State 2
“Alternate
intercom
function”
“Standard
Intercom
Function”
“Music #1
all head-
sets”
“Music
#1 distri-
bution
crew.”
“Standard
Music Dis-
tribution
“Alternate
music dis-
tribution ”
Button Function Table