PS Engineering PMA8000BT NUI Installation Manual - Manual (Page 16)

PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual for units with serial number CBT1561 and above
200-890-1702 Page 2-9 New, April 2011
is ONLY active in CREW mode, and then provided only to the passengers. The externally switched passen-
ger 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
The pilot and copilot can hear the Function Key annunciations. If the customer wants to exclude playback
and function key annunciation playback from the copilot position, contact PS Engineering for more infor-
mation.
2.5.4 Playback button Installation
Internal Recorder can be played back from the front panel. A remote momentary, normally open (NO) push
button switch may be installed if desired to remotely activate the Recording System playback. This switch
can be located anywhere in cockpit convenient to the pilot's reach. The NO switch should be connected to
pin 22 of J2 of the PMA8000BT, and ground. When installed, this button will act as in § 3.13.
2.6 Marker Beacon Installation
2.6.1 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.
2.6.2 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 +7.0 VDC
4.0 VDC unloaded, at MAX
brightness) when active. Maximum source current per lamp is 125 mA. Voltage varies with photocell dim-
ming.
2.6.3 Middle Marker Sense
A Middle Marker Sense output signal is available from the PMA8000 to certain 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 39.
2.7 Adjustments
The PMA8000BT is factory adjusted to accommodate the typical requirements for most aircraft configura-
tions. There are three adjustments in the top cover that allow the installer to tailor the specific functions.