PS Engineering PMA8000B Installation Manual - Manual (Page 21)

PS Engineering
PMA8000B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0100 Page 2-14 Rev. 13, Dec. 2009
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 equi p-
ment on the aircraft.
2.12.3 Marker Checkout
1. Connect a ramp generator at the antenna end of the marker coax. With the unit under test in HI sens i-
tivity, 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.
2.12.4 TEL Checkout
Press the TEL button. Verify that the pilot headset is connected to the cellular telephone system (if in-
stalled). Verify that by using the pilot side PTT, the pilot can transmit on the other selected radio (Com 1
or Com 2). The telephone function will allow any person heard by the pilot on the intercom, also heard on
the telephone.
2.12.5 Internal Recorder Checkout
With headset plugged into pilot’s side jacks, tune COM 1 to local frequency, such as FSS or ATC ground.
Select Com 1 on mic selector switch, and record several incoming radio transmissions.
Press the Com receiver pushbutton that corresponds to the selected radio transmitter and Hold for ap-
proximately one second. This action will then automatically play back the last recorded message. Press
and HOLD both buttons again to stop the play back, and then momentarily press again to play prior me s-
sages.
This audio should appear in the pilot and copilot headsets, and only be incoming transmissions from the
transceiver selected in the mic select switch. Depress the audio panel or yoke mounted playback switch,
and verify that messages play, in the order received. Repeat for COM 2. The playback will be stopped by
audio on the selected com. The message can be replayed from the beginning, and audio received during
the playback will not be stored.
2.12.6 Function Button Checkout
While listening to the pilot’s headset, press and hold the “TEL” button. Press the AUX, MUTE and SPR
buttons, verifying that the annunciations play back in pilot headset. See operation section for information.
Incoming audio on selected com will stop the audio.
2.13 Final Inspection
Verify that the wiring is bundled away from all controls and no part of the installation interferes with ai r-
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 accor-
dance 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 r ough surfaces, and
that all contact points are protected from abrasion.
Complete documentation that may be required, such as a logbook entry, weight and balance computation and FAA
Form 337. Sample text for FAA Form 337, and instructions for continuing airworthiness can be found in Appendix F.
Return completed warranty registration application to PS Engineering, or complete online at www.ps-engineering.com.