PS Engineering
PMA6000B Audio Selector Panel and Intercom System
Installation Manual
200-066-0200
Page 2-9
Rev 6, Feb. 2013
11. Press and hold the Com 1 Xmt button. While holding the Com 1 button, press the Com 2 Xmt button.
This places the unit in “Split Mode;” Verify that the pilot can transmit and receive on Com 1, while the
copilot transmits and receives on Com 2.
12. Verify proper operation of all receiver sources by selecting them using the appropriate button. The but-
ton illuminates to show which source is in use.
13. Push the SPR button. Verify that all selected audio is heard in the cockpit speaker. Verify that the audio
mutes when the mic is keyed.
14. Verify that the appropriate LED in the lower button row blinks when either push to talk is keyed.
15. Verify proper Intercom system operation in the
A
LL
, I
SO
and
C
REW
modes (see Table 3-1).
16. Verify that the audio selector panel system does not adversely affect any other aircraft system by sys-
tematically switching the unit on and off, while monitoring the other avionics and electrical equipment
on the aircraft.
2.9.3
Marker Checkout
1. Connect a ramp generator at the antenna end of the marker coax. With the unit under test in HI sensitiv-
ity, verify that a 160
V, modulated 95% with 1300 Hz, signal will illuminate the amber (M) marker
light, and that marker audio is present in the headphones when the Marker Audio (M) push-button has
been depressed. Select SPR for speaker to verify marker audio availability on the cabin speaker. Verify
that the white (I) and blue (O) lights will illuminate within
3dB of the amber lamp, with 3000 HZ and
400 Hz applied, respectively.
2. Repeat with the unit in LOW sensitivity, with 430
Volts applied.
3. Connect the marker antenna and verify proper operation.
2.10 Final Inspection.
Verify that the wiring is bundled away from all controls and no part of the installation interferes with air-
craft control operation. Move all controls through their full range while examining the installation to see
that no mechanical interference exists. Verify that the cables are secured to the aircraft structure in accord-
ance with good practices, with adequate strain relief. Ensure that there are no kinks or sharp bends in the
cables and coaxial cables. Verify that the cables are not exposed to any sharp edges or rough surfaces, and
that all contact points are protected from abrasion. Complete logbook entry, FAA Form 337, weight and
balance computation and other documentation as required. Return completed warranty registration applica-
tion to PS Engineering, or register online at
www.ps-engineering.com/warranty.shtml
.
