PS Engineering PMA8000B Installation Manual - Manual (Page 15)

PS Engineering
PMA8000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0100 Page 2-8 Rev. 13, Dec. 2009
NO T E
Use t h e l ow l evel ou t p u t of a n y a d d i t i on a l en t er t a i n m en t d evi ce t o con n ect t o t h e a u -
d i o p a n el . Ma x i m u m si g n a l l evel i s 3 VAC p - p . DO NO T u se a sp ea k er - l evel ou t p u t ,
t h i s wi l l ca u se i n t er n a l d a m a g e i n t h e a u d i o p a n el .
2.5.2 Entertainment muting
The PMA8000B-system incorporates a "Soft Mute™" system. This will mute the entertainment devices
during ICS or radio conversation. See
Section 3.8 for more information.
Any signal appearing in the hard wired unswitched audio inputs will alwa ys mute the entertainment
sources, even though the passengers may not hear the audio tone itself.
Press the Mute switch to activate the four Karaoke modes (disabling crew SoftMute™). This allows the
pilot to place the entertainment into the background whi le having the radios in the foreground. This elimi-
nates the constant interruption of the music while still having the radios a priority.
CAUTION
Local oscillators and internal signals from entertainment equipment can cause und esired interference with
other aircraft systems. Before takeoff, operate the entertainment devices to determine if there is any a d-
verse effect within the aircraft systems. If any unusual operation is noted in flight, immediately switch off
the entertainment devices.
All additional entertainment devices must be switched off for both takeoff and landing.
2.5.2.1 Entertainment 2 Mute (J2 Pin 13 & 14)
Connecting J2 pin 13 to pin 14 (or ground) through a SPST switch places the entertainment #2 music
source into the Karaoke Mode. In this mode, incoming music and intercom conversation will not mute the
music for the passengers’ intercom net. This allows uninterrupted music during casual conversation and
at times when radio communications are of lesser importance.
If desired, the AUX button can act as the passengers’ mute control. Connect J2 pin 18 (AUX logic) to J2
pin 13 (Entertainment. 2 Mute inhibit).
2.5.3 Configuring Music Input with Function Keys
The two music inputs can be configured by the user from the front panel (see section 3.10). There are
three configurations available, independent, ICS mode dependent, and single input.
If the inputs are independent, Input #1 (and the front jack) is provided to the pilot and copilot. Muting
(SoftMute™) is controlled by the front panel “mute” button.
If the inputs are intercom mode dependent, input 1 goes to the pilot, copilot and all passengers when the
intercom is in the “ALL” mode. In “ISO” mode, the copilot and passengers will hear music input 1. Music
2 is ONLY active in CREW mode, and then provided only to the passengers. The passenger SoftMute™
control becomes active in CREW.
If the single-source mode is activated through the function keys, the front panel jack (and music 1) is con-
nected to all intercom positions, regardless of the intercom mode. Crew muting is controlled by the front
panel, passenger muting controlled through the switch. See section 3.11 for more details.
2.5.3.1 Annunciation and recorder playback
In units above serial number J01861, the pilot and copilot can hear the Function Key annunciations. If the
customer wants to exclude IRS and function key annunciation playback from the copilot position, co ntact
PS Engineering for more information.