PS Engineering PMA8000MP3-Avidyne - Manual (Page 16)

PS Engineering
PMA8000B-MP3Avidyne Version (-0403) Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0403 Page 2-9 Rev. 4, Jan. 2011
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 -2A (or later
revision), Chapter 3, for information on proper antenna installation techniques. The marker beacon a n-
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 PMA8000-MP3 to certain flight control sys-
tems. 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-MP3 is factory adjusted to accommodate the typical requirements for most aircraft co n-
figurations. There are three adjustments in the top cover that allow the installer to tailor the specific fun c-
tions.
Figure 2-4- PMA8000B-MP3 Adjustments, top cover
 Speaker Volume- Turn adjustment clockwise to increase cabin speaker output.
 Marker Beacon Volume, turn adjustment counterclockwise to increase marker beacon audio
level.
Front
of unit
NOTE:
If top cover is removed
for ANY reason, you
MUST replace the cover
screws with the proper
length, otherwise damage
will result.
Shorter Screw