User guide

Page 12 Revision 6
PMA8000B MP3
Music Muting
Music source #1 (front panel jack and Music 1 input) has four muting
modes, which are announced in the headset as they are activated.
These are: Radio Mute (aircraft radio mutes music), Intercom Mute
(intercom conversation mutes music), Mute on (both radio and inter-
com mutes music), and Mute off (nothing interrupts music). Press the
Mute button to cycle through the modes in sequence.
Music #2 has muting on or off, and is externally controlled.
Music in pilot isolate mode
The pilot can elect to listen to Music 1, even in the Pilot Isolate mode.
While in the ISO mode, press and hold the ICS mode button, and
press the TEL (function) button. The ICS indicator will blink every
few seconds to indicate this mode is active.
Function Configuration
Functions A, B, and C give the PMA8000B MP3 some special capa-
bilities.
Function A allows the passengers and crew to converse, in ALL in-
tercom mode, without distracting the crew from radio duties. The pas-
senger microphones are cut out from the crew when the radio is ac-
tive, and the passengers never hear aircraft radios. Press TEL and
AUX buttons to activate Function A, and you will hear “Alternate
Intercom Function.” Press these buttons again to exit, and you will
hear “Standard Intercom Function.”
Function B activates a Monitor Mode. In this case, the audio from
Annunciation
LED Intercom Radio
“Mute on” on Muted Muted
“Mute off” off
♫ ♫
“Radio mute” off
♫
Muted
“Intercom off Muted
♫