PS Engineering PMA7000B Specifiche Scaricare il pdf (Pagina 14)

PS Engineering

PMA7000B Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual

200-780-0005 Page 2-7 Rev. 11, February 2015

Ent. #2 Input

Alternate Music Interconnect

Ent. #1 Input

NOTE: Use the low level output of any additional entertainment device to connect to

the audio panel. Maximum signal level is 2 VAC p-p. DO NOT use a speaker-level

output, this will cause internal damage in the audio panel.

2.4.16.1.1Entertainment muting

The PMA7000B-system incorporates a "Soft Mute" system. This will mute the entertainment devices during

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 interfer-

ence 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.

2.4.16.1.2Entertainment 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. Interface to

the expansion unit is through J2, pins P (audio input from expansion unit), S (audio output to expansion

unit) and C (9 VDC expansion power).

2.5 Marker Beacon Installation

The marker beacon receiver is an option included in the PMA7000B. Non-marker (PMA7000) units can

provide audio interface with the external receiver (see section 2.5.4).

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 35 36

Nessun commento

PS Engineering PMA7000B Specifiche Pagina 14