PS Engineering PM1000DAP - Manual (Page 5)

PM1000-DAP Dual Audio System Intercom Page 8 April 2008
Section Item Information
1 Introduction Installation of intercommunications system
2 Description 2-place crew interphone system, voice activated.
3 Controls See installation and operator’s guide referenced on FAA
Form 337
4 Servicing None required
5 Maintenance Instructions On Condition, no special instructions
6 Troubleshooting In the event of a unit problem, place the unit into “off,.”
Because the PM1000D The crew will remain connected to
the aircraft radios. Follow checkout instructions in the
installation manual referenced on the FAA Form 337. For a
specific unit fault contact the manufacturer at (865) 988-
9800 for special instructions.
7 Removal and replacement information To remove the PM1000-DAP,
1. Remove four (4) knobs by pulling straight off. 2.
Remove two (2) countersunk Phillips screws. 3. The
unit will now be loose from the panel. 4. Release the
unit connector using the thumbscrews.
8 Diagrams Not Applicable
9 Special Inspection Requirements Not Applicable
10 Protective Treatments Not Applicable
11 Structural Data Not Applicable
12 Special Tools None
13 Not Applicable Not Applicable
14 Recommended Overhaul Periods None
15 Airworthiness Limitations None
16 Revision To be determined by installer
Instructions for Continuing Airworthiness
Revision 5 Page 5 200-191-0000
the OFF position (left hand volume knob
fully counterclockwise).
4. Rotate the pilot volume clockwise, about
half way. Verify that the Pwr light comes on,
and shows green.
5. Verify that the pilot can transmit and receive
on the com transceivers.
6. Verify proper intercom operation for pilot,
and copilot. For more information, consult
Section III.
7. Verify proper transmit and receive operation
on the copilot position, noting that the copi-
lot PTT switch allows proper transmission
on the selected transceiver.
8. Verify proper Intercom system operation in
the ALL, ISO and CREW (if equipped)
modes.
9. Verify that the intercom system 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 aircraft.
Section III OPERATION
With the installation complete, turn the
PM1000-DAP on by rotating pilot's volume con-
trol. The intercom volume control does not control
the volume of the aircraft radio, allowing an addi-
tional degree of aircraft radio listening flexibility.
3.1 Adjusting the Volume
The pilot's volume control knob adjusts the
loudness of the intercom for the pilot's headset
only. The copilot's volume control only adjusts the
intercom volume for the copilot. These have no
effect on aircraft radio volume level.
3.2 Squelch Control
The PM1000-DAP provides individual
VOX circuits for the pilot and copilot. The abil-
ity to adjust the trip level of these VOX circuits
(squelch control) allows the use of dissimilar
headsets without the frustration of clipping the
first syllables. The PM1000-DAP has squelch
circuits the pilot, copilot, and one for the pas-
sengers. With individual VOX circuits, back-
ground noise is dramatically reduced.
With the engine running, set the squelch
control knob by slowly rotating the squelch
control knob clockwise until you no longer hear
the background noise in the earphones. When
the microphone is positioned properly near the
lips, normal speech levels should open the chan-
nel. When you have stopped talking, there is a
delay of about one second before the channel
closes. This prevents squelch closure between
words, and helps eliminates choppy intercom
conversations.
3.3 Mode Select
The center switch is a three position mode
control that allows the crew to tailor the inter-
com function to suit flight conditions. Regard-
less of configuration, the crew will always hear
the aircraft radio.
ISO (Up Position): The pilot is isolated
PM1000-DAP Front Panel Controls
Pilot Copilot
Volume
Power
Squelch
ICS
Mode