PS Engineering PMA8000MP3 Installation Manual - Manual (Page 26)

PS Engineering
PMA8000B-MP3 Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0600 Page 3-5 Rev. 6, Oct. 2010
Adjust the radios and intercom volume for a comfortable listening level. Most gener al aviation headsets
today have built-in volume controls; therefore, volume also can be further adjusted at the individual hea d-
set.
3.7.2.1 Mono headsets in Stereo Installation
The pilot and copilot positions work with stereo or mono headsets. All passenger headsets are connected
in parallel. Therefore, if a monaural headset is plugged in to a PMA8000B-MP3 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. PS Engineering modifies headsets to add stereo
capability, using high-fidelity speakers. Contact factory for details.
3.7.3 Intercom Modes (8)
The “ICS” pushbutton switch on the left side of the panel provides the selection of the three intercom
modes. The description of the intercom mode function 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, then bottom to top as: ISO, ALL
Crew and Crew, ALL, ISO. An LED shows which mode is currently active.
I SO : The pilot is isolated from the intercom and is connected only to the aircraft radio sy stem. He will
hear the aircraft radio reception (and sidetone if provided by the radios during transmissions). Copilot will
hear passengers’ intercom and entertainment, while passengers will hear copilot intercom and entertai n-
ment. Neither will hear aircraft radio receptions or pilot tran smissions. The pilot can listen to music 1 in
ISO mode. See §3.8.1 for more information.
A LL : All parties will hear the aircraft radio and intercom. Crew and passengers will hear selected ente r-
tainment. During any radio or intercom communications, the music volume automatically decrea ses. 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. They may also listen to Entertai nment 1. Passengers can continue to communicate with themselves
without interrupting the Crew and may listen to entertainment as configured.
3.7.4 Split Mode Intercom
When the PMA8000B enters the Split Mode (pilot on Com 1, copilot on Com 2) the intercom for the crew
is muted. Intercom communication can be restored, if desired, by pressing the Mute button on the a udio
panel. The LED indicator in the MUTE button will indicate when the intercom is muted.
3.8 Music Muting (6)
There are two SoftMute™ muting circuits. The front panel "Mute" button has four music mute 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
previous level comfortably, over a second or so.
The mute mode functions are controlled through sequential pushes of the Mute button, and include a n-
nunciations 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. An-
nunciation 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
"intercom mute."