PS Engineering PMA8000B Installation Manual - Manual (Page 16)

PS Engineering
PMA8000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0101 Page 2-9 Rev. 4, April 2012
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
In units above serial number J01861, the pilot and copilot can hear the Function Key annunciations. If the
customer wants to exclude playback and function key annunciation from the copilot position, contact PS
Engineering for more information.
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 con-
nected to pin 22 of J2 of the PMA8000B, 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 an-
tenna 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 +9 VDC 1.5 VDC unloaded, at MAX
brightness) when active. Maximum source current per lamp is 125 mA. Voltage varies with photocell
dimming.
2.6.3 Middle Marker Sense
A Middle Marker Sense output signal is available from the PMA8000B 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 PMA8000B 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.