PS Engineering PMA7000H Installation Manual - Manual (Page 14)

PS Engineering
PMA7000H Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-780-0429 Page 2-7 Rev. 4, Dec 2012
All entertainment devices must be switched off for both takeoff and landing.
2.4.13.3.2 Entertainment 2 Mute (Pin V)
The ICS button on the PMA7000H 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.
2.4.13.4 Alternate Intercom Mode (Units above Serial Number Starting with “B”)
When the PMA7000H is toggled into “Alternate Intercom Mode,” using a switch connected to Bottom
Connector Pin 14 is grounded, the passengers will NOT hear aircraft radios, even in the all mode. They will
be able to converse with the crew. However, when the aircraft radio becomes active, the intercom audio
from the passengers is muted, allowing the crew to focus on the radio.
2.5 Marker Beacon Installation
The marker beacon receiver is an option included in the PMA7000H.
2.5.1
Marker Antenna Installation
A marker beacon antenna, appropriate to the type and speed of the aircraft, is required (not included). Refer
to aircraft and antenna manufacturer's installation instructions, as well as AC43.13-2B (or later revision),
Chapter 3, for information on proper antenna installation techniques. The marker beacon antenna must be
mounted on the bottom of the aircraft.
2.5.2
External Marker Lights
For installations that require external marker beacon lights, there are three outputs that can drive 12-Volt
lamps only. The external output lamps are driven high (typically +9 VDC  1.5 VDC unloaded, at MAX
brightness) when active. Maximum source current per lamp is 125 mA. Voltage varies with photocell dim-
ming.
2.5.3
Middle Marker Sense
A Middle Marker Sense output signal is available from the 7000B to flight control systems. This function
will not operate during the test mode. This output will go to +4.5 VDC (  1.0 VDC) when a valid Middle
Marker signal is received. This output is J1, pin 2.
2.6 Adjustments
The PMA7000H is factory adjusted to accommodate the typical requirements for most aircraft configura-
tions. There are five adjustments however, that will allow the installer to tailor the specific functions.