PS Engineering PMA8000B Installation Manual - Manual (Page 15)

PS Engineering
PMA8000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0101 Page 2-8 Rev. 4, April 2012
fully functionally tested. Harness can be ordered with jacks, or without the intercom jacks installed, for
easier wire routing through the aircraft.
2.5.1 Entertainment Inputs
The PMA8000B has two INDEPENDENT music inputs, PLUS a front mounted jack that is connected to
Entertainment 1. Entertainment input number 1 is J2 pins 23 (left channel) and 24 (right channel), with
respect to pin 25, and Entertainment number 2 is connected to 26 (left channel), 27 (right channel), with
respect to 28.
Refer to Section 3.11.3 for more information.
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.
Press the Mute switch to activate the four Karaoke modes (disabling crew SoftMute™). Turning down the
entertainment volume allows the pilot to place the entertainment into the background while having the
radios in the foreground and eliminates the constant interruption of the music while still keeping the ra-
dios a priority.
CAUTION
Local oscillators and internal signals from entertainment equipment can cause undesired interference with
other aircraft systems. Before takeoff, operate the entertainment devices to determine if there is any ad-
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). Then, Entertainment 2 will not mute when the AUX button is on.
(Not recommended if DME is input is used.)
2.5.3 Configuring Music Input with Function Keys
The 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 (music 1 to all stations).
If the inputs are independent, Input #1 (or the front jack) is provided to the pilot and copilot. Muting
(SoftMute™) is controlled by the front panel “mute” button. Music 2 is provided to the passengers at all
times, with muting controlled by an external switch (see § 2.5.2.1).
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 externally switched pas-
senger SoftMute™ control becomes active in CREW.