PS Engineering PMA7000B Installation Manual - Manual (Page 14)

PS Engineering
PMA7000B Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-780-0005 Page 2-7 Rev. 10, December 2012
2.4.16 Entertainment Input
The PMA7000B has two INDEPENDENT music inputs. Entertainment input number 1 is J2 pins 15 (left
channel) and 16 (right channel), WRT pin T, and is provided to the pilot and copilot. Entertainment num-
ber 2 is provided to the passengers at all times.
Entertainment 1 and 2 must be connected together in order for all positions to hear the same music source.
We recommend installing a DPDT switch to allow isolation of the music sources if desired.
16
15
T
Ent. #2 Input
14
R
13
Alternate Music Interconnect
Ent. #1 Input
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 2 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 .
2.4.16.1.1 Entertainment muting
The PMA7000B-system incorporates a "Soft Mute" system. This will mute the entertainment devices dur-
ing ICS or radio conversation.
Any signal appearing in the unswitched audio inputs will always mute the entertainment sources, even
though the passengers may not hear the audio tone itself.
Caution: Local oscillators and internal signals from entertainment equipment can cause undesired inter-
ference with other aircraft systems. Before takeoff, operate the entertainment devices to determine if there
is any adverse 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.
2.4.16.1.2 Entertainment 2 Mute (Pin V)
The ICS button on the PMA7000B controls the muting (“Karaoke mode”) of entertainment source #1.
Connecting J2 pin V to 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.
See section 2.4.14 for alternative connection.
2.4.17 PMA7000B Intercom expansion (J2, Pins P, S, and C)
The PMA7000B contains a 6-place intercom. In applications where more intercom positions are needed,
PS Engineering can provide intercom expansion units, such as the IntelliPAX, part number 11606,
11606R, etc. These can add up to six additional stereo intercom stations, plus independent music input.