PS Engineering PMA6000M-C Pilot’s Guide

9800 Martel Road

Lenoir City, TN 37772

www.ps-engineering.com

PMA6000--

PMA6000

PMA6000M, PMA6000M-C

Audio Control Panel

with Monaural Intercom

and optional Marker Beacon

Pilot’s Guide

and

Operation Manual

Series

Series

FAA-TSO C50c, C35d

US Patent 4,941,187: 5,903,277: 6,160,496: 6,493,459

202-066-0002 Revision 3 August 2007

202-066-0002 1 PMA6000 –Mono Pilot Guide

OPERATION

GENERAL INFORMATION

SCOPE

This section provides detailed operating instructions for the PS
Engineering PMA6000C, and PMA6000M-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 guide is divided into four sections covering the basic op­erating areas of the PMA6000 systems. They are: Audio Selec­tor, Audio Selection, Intercom, and Marker Beacon Receiver
(PMA6000M-C only).

Audio Selector (All models)

Figure 1 Audio Selector

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 la-

2 202-066-0002 Rev. 3, August 2007

beled 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 buttons is pressed, it will stay in
the "in" position. Press the switch again and it will 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 from Com 1 and Com 2, as indicated by their
respective lamps.

Speaker Amplifier

The "S" in the push-button section stands for speaker. This
switch will place all selected audio on the cockpit 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.

Mic Selector Switch (Fail Safe Operation)

Figure 2 Mic Selector

Unit power is turned on and off by the
Mic selector switch. In the

FAIL-SAFE" position, the pilot is con-

"

OFF or

nected directly to Com 1 allowing
transmit and receive capability regard­less of unit condition. Any time power
is removed or turned

OFF, the audio se-

lector will be placed in the fail-safe mode. In fail-safe mode,
the pilot headset is connected directly to Com 1. The first posi­tion clockwise from O

FF is COM 1. Both pilot and copilot will

be connected to the Com l transceiver.

Both the pilot and copilot have transmit capabilities on the selected

transceiver. All hear the selected audio if the intercom is in the

LL mode. Only the person who presses their Push To Talk

A

202-066-0002 3 PMA6000 –Mono Pilot Guide

(PTT), will be heard over the aircraft radio. Turning the rotary
switch to the COM 2 position will place pilot and copilot on
Com 2.

The PMA6000-Series has an automatic selector mode. Audio
from the selected transceiver is automatically heard in the
headsets and speaker (when selected). You can check this
function by switching from COM 1 to COM 2 and watch the
selected audio light on the selector change from C1 to C2. This
ensures the pilot will never transmit on a radio that he is not
listening to.

When switching the mic selector rotary switch from COM 1 to
COM 2, while COM 2 audio had been selected, Com 1 audio
will continue to be heard. This eliminates the pilot having to
switch Com 1 audio back on, if desired.

When switching from COM 1 to COM 2 while Com 2 has NOT
been selected, Com 1 audio will be switched off. In essence,
switching the mic selector will not effect the selection of Com
audio.

Placing the mic selector switch in the COM 3 position connects the
pilot and copilot to that radio. This is similar to C
except that the swap mode is not active.

OM 1 and COM 2,

Important: When the mic selector is in the full counter clock­wise position, the PMA6000 power is removed, and it is in the

FAIL-SAFE mode. The pilot headset and microphone are con-

nected directly to Com 1.

Swap Mode (Switch from Com 1 to Com 2 remotely)

With a yoke mounted, momentary switch, the pilot can change
from the current Com transceiver to the other by depressing
this switch. When "Swap Mode" is active, an LED annunciator
will illuminate, indicating that the Mic Selector switch position
is no longer valid. To cancel "Swap Mode," the pilot may ei­ther press the yoke mounted switch again, or turn the Mic Se­lector Switch to the Com that is active.

4 202-066-0002 Rev. 3, August 2007