PS Engineering PMA7000H Pilot’s Guide
PMA7000H
PMA7000H
Audio Selector Panel
Marker Beacon Receiver and
Stereo Intercom System
Flying Never Sounded So Good™
Pilot’s Guide
Pilot’s Guide
And
And
Operation Manual
Operation Manual
Patent No. 5,903,277 & 6,160,496
FAA-Approved TSO C50c, C35d
JAA-Approved JTSO 2C35d, C50c
202-780-0429 Revision 1 June 2009
Revision 1, June 2009
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OPERATION
SCOPE
This section provides detailed operating instructions for the PS Engineering
PMA7000H Audio Selector Panel/Intercom Systems. Please read it carefully before using the equipment so that you can take full advantage of its
capabilities.
This chapter is divided into four sections covering the basic operating areas
of the PMA7000H systems. They are Audio Selector, Transceiver Selection, Intercom, and Marker Beacon Receiver.
MARKER INDICATOR LAMPS
MARKER MODE
IINTERCOM MODE
PILOT & CO PILOT VOLUME (INNER)
PASS VOLUME (OUT ER)
RECEIVE AUDIO SELECTORS
TRANSMIT SELECT ORS
CREW ICS
CD MUTE CONTROL
PMA7000H controls
Power Switch (EMG-Fail Safe Operation)
Unit power is turned on and off by pushing the volume knob. In the OFF or
"EMG" position, the pilot is connected directly to Com 1 and to the
unswitched #1 . This allows communication capability and critical audio
input regardless of unit condition. Any time power is removed or turned
OFF, the audio selector will be placed in the fail-safe mode.
The power switch also controls the audio selector panel functions, intercom, and marker beacon receiver.
SPEAKER CONTROL
Microphone (XMT) Selection (All models)
There are six pushbuttons associated with the communications transceivers.
The lower buttons control which transceiver is selected for transmit.
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PMA7000H Pilot Guide
The PMA7000H gives priority to the pilot’s PTT. If the copilot it transmitting, and the pilot presses his PTT, the pilot’s microphone will be heard
over the selected com transmitter.
The PMA7000H-Series has an automatic selector mode. Audio from the
selected transceiver is automatically heard in the headsets and speaker (if
selected). You can check this function by switching from C
OM 1 to COM 2
and watch the selected audio light on the selector change from COM 1 to
COM 2. This ensures the pilot will always hear the audio from the transceiver he is transmitting on.
When switching from C
OM 1 to COM 2, while COM 2 audio had been se-
lected, Com 1 audio will
continue to be heard.
This eliminates the pilot
RCV
having to switch Com 1
audio back on, if desired.
When switching from
C
OM 1 to COM 2 while
XMT
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 receiver audio.
When the duplex, or TELEPHONE mode is implemented, Com 3 becomes
the “TEL” position. See page 8 for complete information.
NOTE: Selecting COM 3 –TEL– mode will disable pilot and copilot intercom, as the intercom circuit is transferred to the telephone use.
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 (Com 1 or 2) to the other by depressing this
switch. To cancel "Swap Mode," the pilot may either press the yoke
mounted switch again, or select a different Com with the XMT buttons.
Audio Selector
Receiver audio is selected through seven momentary, push-button, backlit
switches. You will always
lected for transmit.
The users can identify which receivers are selected by noting which of the
green switch LEDs are illuminated. Push buttons labeled Nav 1, Nav 2,
MKR (Marker), AUX (auxiliary), and SPR (Speaker) are "momentary type
switches. When one of these buttons is pressed, be active, and the LED will
illuminate. Press the switch again and it be in the "off" position and remove
that receiver from the audio.
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Speaker Amplifier
The "SPR" in the push-button section stands for
speaker. This switch will place all selected audio
on the cockpit speaker when this switch is activated. NOTE: Except for the unswitched audio, the
speaker amplifier is not active in the "Split Mode."
Unswitched audio, (autopilot disconnect, altimeter warning, etc.) will come
through the speaker regardless of the speaker button position.
Public Address Function
To access PA function, an external switch must be installed, and activated.
This places the pilot microphone on the speaker output when the PTT is
pushed. The copilot can continue to use the selected com radio.
We recommend that the switch transfer the audio from the cockpit speaker
to a cabin speaker for public address. This will prevent feedback.
Split Mode
The split mode can be activated at any time by pressing the desired combination of XMT buttons. For instance, to activate a Com 1/Com 2 split,
press and hold the Com 1 button, and then press the Com 2 button while
holding the Com 1 button. This places the pilot on Com 1 and the Copilot
on Com 2.
Split mode for Com 3, in normal (not TEL/Duplex) is possible with pilot on
Com 1, copilot on Com 2 or 3. Pilot on Com 2 or Com 3 and Copilot on
Com 1 is not possible.
Note:
Due
to the nature of VHF communications signals, and the size
constraints in general aviation aircraft, it is probable that there
will be some bleed-over in the Split mode, particularly on
adjacent frequencies. PS Engineering makes no warranty about
the suitability
Note: Split Mode does not turn off other (Nav, ADF, etc.) selected
audio to pilot. However, the copilot will only hear the selected
of Split Mode in all aircraft conditions.
communications receiver.
Split Mode ICS
In split mode, the pilot and copilot are usually isolated from each other on
the intercom while simultaneously using their respective radios. Depressing
the ICS button in Split Mode will activate VOX intercom between the pilot
and copilot positions. This permits intercommunication when desired between the crew. Pressing the ICS button again disables this crew intercom
function.
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