PS Engineering PMA6000M-S - Manual (Page 20)

PS Engineering
PMA6000 Series Audio Selector Panel and Intercom System
Installation Manual
200-066-0006 Page 3-3 Rev. 6, March 2005
3.5 Split Mode (6000C, 6000MC, 6000SC, 6000MSC)
Operation is identical to section 3.4 (above) except turning the mic selector clockwise to the C OM 3 posi-
tion places both pilot and copilot on Com 3, and exits the split mode. All selected audio inputs and inter-
com function return.
Note: In all PMA6000s, Split Mode turns off all other (Nav, ADF, etc.)selected audio to pilot and
copilot. Additionally, there is no intercom function between pilot and copilot. Passengers still have
intercom capability among themselves.
3.6 Intercom
3.6.1 Volume Control, Monaural (6000, 6000M, 6000C, 6000MC)
The pilot volume control knob adjusts the loudness of intercom and
music in the pilot’s headphones only. It has no effect on selected
radio audio levels. The copilot volume control adjusts the loudness
of the intercom and music in the copilot headset only. The passen-
ger volume is factory set at a comfortable level. This is a service
adjustment that can be accessed by the avionics technician. Most
general aviation headsets have a built-in volume control, so volume
can be adjusted “locally.”
3.6.2 Volume Control, Stereo, (6000S, 6000MS, 6000SC, 6000MSC)
The volume control knob adjusts the loudness of the intercom and
music for the pilot and copilot only. It has no effect on selected
radio levels or passengers' level. The passenger volume level is
factory set for a comfortable listening level. Most general aviation
headsets today have a built-in volume controls, therefore, volume
can be adjusted at the headset. There is a service adjustment that
can be accessed by the avionics technician. This will allow ad-
justment of the passenger's volume for a comfortable listening
level.
3.6.2.1 Mono headsets in Stereo Installation
All passenger headsets are connected in parallel. Therefore, if a monaural headset is plugged in to a
PMA6000 Stereo installation, one channel will be shorted. Although no damage to the unit will occur, all
passengers will lose one channel.
PS Engineering modifies monaural headsets to add stereo capability, using high-fidelity speakers.
Contact factory for details.
3.6.3 Adjusting the VOX-Squelch control, Monaural (6000, 6000M, 6000MC)
The PMA6000 provides adjustable VOX squelch controls for the pilot and copilot (the copilot's VOX con-
trol also adjusts the passengers VOX squelch) Since the number of microphones open at any one time is
reduced, the amount of background noise is diminished. This also allows the use of dissimilar headsets
Figure 3-4 Volume Control Stereo