PS Engineering
PMA7000M-S Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-070-0006
Page 2-8
Rev. 6, Nov 98
2.5.2 External Marker Lights (7000MS)
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 (+9 VDC
±
1.5
VDC) when active. Maximum source current per lamp is 125 mA. Voltage varies with
photocell dimming.
2.5.3 Marker Antenna Installation
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 tech-
niques. The marker beacon antenna must be mounted on the bottom of the aircraft.
2.5.4 Marker Input (7000, 7000S)
If using an external marker receiver, the audio input is J1, pin 21 (MKR. input).
2.6 Adjustments
The PMA7000M-S is factory adjusted to accommodate the typical requirements for most
aircraft configurations. There are five adjustments however, that will allow the installer to
tailor the specific functions.
Marker Gain
CW- Reduce
Passenger Volume
CCW Increases
Marker Audio
CW Decrease Volume
MKR Low Sense
CW Decrease Sens.
Front of Unit
PMA 7000 adjustment holes
Not used
Speaker Volume
CW-Increase
Figure 2-1- PMA7000M-S Adjustments
2.7 Communications Antenna Installation Notes
For best results while in Split Mode, it is suggested that the one VHF communications
antenna is located on top of the aircraft while the other communications antenna is in-
stalled on the bottom. Any antenna relocation must be accomplished in accordance with