PS Engineering PMA8000C Installation Manual - Manual (Page 27)

PS Engineering
PMA8000C Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0303 Page 3-6 Rev. 3, May 2014
You can refer to Advisory Circular 91.21-1A for more information, at http://www.faa.gov
3.8.1 Music Muting
The front panel "Mute" button has four modes, and controls the Mute function for Music 1.
The SoftMute™ circuit will cut the music out whenever there is conversation on the radio, the intercom, or
both, depending on the “Mute” mode selected. When that conversation stops, the music returns to the previ-
ous level comfortably, over a second or so.
The mute mode functions are controlled through sequential pushes of the Mute button, and include annunci-
ations of the mode selected.
Mode 1 - music will mute with either intercom or radio - MUTE button is lit. Voice annunciation is "mute
on."
Mode 2 - “Karaoke” mode - music will not mute except during transmissions.- MUTE LED is OFF. Annun-
ciation is "mute off."
Mode 3 - Radio will mute music, but intercom will not mute music - MUTE LED is OFF. Annunciation is
"radio mute."
Mode 4 - Radio will not mute music, intercom will mute music - MUTE LED is OFF. Annunciation is "in-
tercom mute."
♫ Music Intercom Radio Annunciation LED
Mode 1 Muted Muted “Mute on” on
Mode 2 ♫ ♫ “Mute off” off
Mode 3 ♫ Muted “Radio mute” off
Mode 4 Muted ♫ “Intercom mute” off
The passenger’s intercom also has a SoftMute™ circuit. If the passengers hear the radio, or talk on the in-
tercom, 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 (passengers can only hear FP jack when you’re in “Alternate Music Distribution”), their Karaoke
Mode is controlled by the front panel “Mute” button. If the passengers are listening to the music 2 input,
their Karaoke Mode is activated by holding the AUX and MUTE buttons for more then one second.
3.8.2 Music in Pilot ISO mode
If desired, the pilot can elect to hear Music #1, in the ISO mode. While the intercom is in ISO mode, push
and hold the ICS button until the ICS indicator blinks (about 1 second). This mode will be indicated by the
ICS LED blinking slowly (once in every 5 seconds). The pilot will now hear Music #1, and it will mute in
accordance with the Mute mode as described in §3.8.
3.9 This function is not remembered when the audio panel is turned off.
Utility Jack
The 2.5-millimeter (3/32”) jack on the front of the PMA8000C has two functions:

Advisory audio input

Music input
The use of this jack is controlled by three Smart Function Keys (SFK) controlled from the front panel. See
Section 3.10 — Smart Function Keys.