PS Engineering PMA6000M-S - Manual (Page 18)

PS Engineering
PMA6000 Series Audio Selector Panel and Intercom System
Installation Manual
200-066-0006 Page 3-1 Rev. 6, March 2005
Section III OPERATION
GENERAL INFORMATION
3.1 SCOPE
This section provides detailed operating instructions for the PS Engineering PMA6000, PMA6000S,
PMA6000M, PMA6000M-S, PMA6000C, PMA6000S-C, PMA6000M-C, and PMA6000M-S-C Audio
Selector Panel/Intercom Systems. Please read it carefully before using the equipment so that you can take
full advantage of its capabilities.
This section is divided into four sections covering the basic operating areas of the PMA6000 systems. They
are: Audio Selector, Transceiver Selection, Intercom, and Marker Beacon Receiver (6000M, 6000M-C
6000M-S and 6000M-S-C only).
3.2 Audio Selector (All models)
Through the use of two momentary and seven latched, push-button,
back-lit switches, it is possible to select any or all receiver audio. C1
and C2 are momentary switches.
When selected, an internal backlight will illuminate indicating which
audio source is selected. Because the rotary switch controls what
transceiver is being heard by the pilot and copilot (the crew), "Cl"
(Com 1) and "C2" (Com 2) push-buttons are of the momentary type
and do not remain in when selected. This is also part of the "auto
function." You will always hear the audio from the transceiver that
is selected by the rotary mic selector switch.
The users can identify which receivers are selected by noting which
push-button switches are illuminated. Push buttons labeled Nl (Nav 1), N2 (Nav 2), D (DME), M
(Marker), A (ADF), AX (auxiliary), and S (Speaker) are "latched" type switches. When one of these but-
tons is pressed, it will stay in the "in" position. Press the switch again and it be in the "out" position and
remove that receiver from the audio. While selected, the switch will also be annunciated by an internal
lamp.
NOTE: In Split Mode, no pushbuttons will be active. The only audio selected is the com 1 and two, as in-
dicated by their respective lamps.
3.2.1 Speaker Amplifier
The "S" in the push-button section stands for speaker. This switch will place all selected audio on the cock-
pit speaker when this switch is selected. NOTE: with the exception of unswitched unmuted inputs
(Altimeter warning), the speaker amplifier is not active in the "Split Mode." To reduce power consumption
and internal heat buildup in the avionics stack, switch off the speaker amplifier when not in use.
Figure 3-1 Audio Selector