PS Engineering PMA9000EX Installation Manual - Manual (Page 19)

PS Engineering
PMA9000EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-920-0000 Page 2-12 Rev. 9, Jan. 2011
12. Verify proper operation of all receiver sources by selecting them using the appropriate means. The N1
and N2 indicators illuminates to show which source is in use, ADF, DME AUX and MKR are indi-
cated in the display.
13. Activate the SPR mode. 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 uni t under test in HI sensi-
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 (MKR) -
has been selected. 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 TELEPHONE Checkout
Activate the TELEPHONE mode. Verify that the pilot headset is connected to the cellular telephone sys-
tem (if installed). 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 place 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. NOTE: Due to the
continuous nature of AWOS information broadcasts, these will not be properly stored, and should not be
used for testing purposes.
Press the Com XMT pushbutton that corresponds to the selected radio transmitter and hold for approxi-
mately 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 messages.
This audio should appear in the pilot and copilot headsets, and only be incoming transmissions from the
transceiver selected in the mic select switch.
If installed, check the audio panel or yoke mounted playback switch, and verify that messages play, in the
order received. Repeat for COM 2.
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 acco r-
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 rough surfaces, and
that all contact points are protected from abrasion.
Return completed warranty registration application to PS Engineering, or complete online at www.ps-
engineering.com.