PS Engineering PMA6000M-S User Manual

Page 16

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PS Engineering

PMA6000 Series Audio Selector Panel and Intercom System

Installation Manual

200-066-0006

Page 2-9

Rev. 6, March 2005

2.10 Marker Checkout, 6000M, 6000M-C, 6000M-S Only

1. Connect a ramp generator at the antenna end of the marker coax. With the unit under test in HI sensi-

tivity, verify that a 150

µVolts, 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 "S" for speaker to verify marker audio availability on the cabin
speaker. Verify that the white (A) 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 1400

µVolts applied.

3. Connect the marker antenna and verify proper operation.

2.10.1 Operational Checkout, 6000C, 6000M-C and 6000M-S-C

1. Apply power to the aircraft and avionics.
2. Plug headsets into the pilot, copilot and passenger positions.
17. With avionics on, and the audio panel off, verify that the pilot can transmit and receive on COM 1,

through the headset, indicating proper “fail-safe” operation. On stereo units, the audio is present in the
right ear only.

3. Rotate the Mic Selector Switch to the C

1 position.

4. Verify that the C1 light comes on. Verify that the power LED (Light Emitting Diode) in the intercom

section illuminates green. If the LED is red, stop testing and troubleshoot the microphone PTT
installation.

5. Verify proper transmit and receive operation on the copilot position, noting that the copilot PTT

switch allows proper transmission on the selected transceiver.

6. Verify that pushing the C2 button causes the button to illuminate, and the Com 2 receiver to be heard.

Verify operation on Com 1 from the pilot position.

7. Repeat for Com 2 and Com 3, (if installed).
8. Rotate the mic selector switch to the C

1/2 position. Verify that the pilot communicates on Com 1

and the copilot on Com 2.

9. Rotate the mic selector switch to the C

2/1 position. Verify that the pilot communicates on Com 2

and the copilot on Com 1.

10. Rotate the mic selector switch to the C

3 position. Verify that the pilot communicates on the trans-

ceiver in the Com3 position and the copilot on Com 1.

11. Verify proper operation of all receiver sources by selecting them using the keypad. Note that the but-

ton for the receiver sources stays in, and the button illuminates to show which source is in use.

12. Push in the S (SPR) button. Verify that all selected audio is heard in the cockpit speaker. Verify that

the audio mutes when the mic is keyed.

13. Verify that the LED in the intercom changes from green to red when a microphone is keyed. NOTE:

LED does not change color in "Split Mode".

14. Verify proper Intercom System operation in the A

, I

and C

REW

modes.

15. Verify that the unit under test does not adversely affect any other aircraft system by systematically

switching the unit on and off, while monitoring the other avionics and electrical equipment on the air-
craft.

2.10.1.1

Marker Checkout, 6000M-C, 6000M-S-C Only