Operating instructions

202-890-0602 Page 15
July 2008 PMA8000MP3 Pilot Guide
control the muting of the front panel util-
ity jack, when Music 1 is NOT active.
The SoftMute™ circuit will cut the mu-
sic almost completely out whenever there
is conversation on the radio or intercom.
When that conversation stops, the music
returns to the previous level comfortably,
over a second or so.
The pilot and copilot have one muting circuit, which is controlled by
the front panel button labeled “Mute.” When this button is pressed,
the PMA8000B MP3 goes into the Karaoke Mode, and the music will
not mute for incoming radio or intercom conversation.
The passenger’s intercom also has a SoftMute™ circuit. It behaves
the same way as the crew; if the passengers will hear the radio, or talk
on the intercom, the music will mute. If the audio panel is in CREW
mode, then the radio reception will not affect the passenger music.
Passengers also have a Karaoke Mode. If the passengers are listening
to the music 1 input or front panel input, their Karaoke Mode is con-
trolled by the front panel button labeled "Mute". If the passengers are
listening to the music 2 input, their Karaoke Mode is activated by an
external switch installed either in the panel, or connected to the AUX
button logic output pin on the PMA8000B MP3.
Music Controls
Above the top row of buttons are icons that relate to the MP3 player
operation. Below the Shift/Function legends, you’ll see a row of blue
legends that refer to MP3 files and volume controls.
To activate these controls, you hold the Shift/Hold function, and press
the desired button.