PS Engineering PMA8000C Installation Manual - Manual (Page 24)

PS Engineering
PMA8000C Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0303 Page 3-3 Rev. 3, May 2014
telephone.
This connects the telephone to the users as follows:
In ALL intercom mode, all crew and passengers will be heard on the phone when they speak. COM and
other selected radio audio is also heard in the headsets. If the pilot or copilot pushes the radio PTT, their
mic will be transferred to the selected COM radio. The telephone party will not hear ATC communications,
and vice versa.
In CREW mode, only the pilot and copilot are connected to the telephone. Passengers will not hear the
telephone. The pilot and copilot will also have transmit capability on the other selected transceiver.
In ISO intercom mode, when the PMA8000C is in the Bluetooth telephone mode, the pilot position is in
the "Phone Booth." Only the pilot will hear the telephone, and only he will be heard. He will also have ac-
cess to COM 1 or 2, and will transmit on that radio using the PTT. All selected audio is provided to the
pilot.
There is no provision to have just the copilot or on the phone. If the PMA8000C is in SPLIT Com mode,
just the passengers will be connected to the phone.
NOTE
Because the cell-phone uses an intercom circuit, all stations on that circuit will lose intercom capability
when the cell phone is in use.
3.4.1 Cell phone Sidetone
As shipped from PS Engineering, the PMA8000C will provide cellular telephone sidetone (the user’s voice
fed back to the headset). Some cell phones do provide sidetone. In PMA8000C audio panels, Telephone
sidetone can be enabled/disabled by pressing the COM 3 and ADF buttons for more than one second.
3.5 Speaker Amplifier (5)
The SPR in the lower right section stands for speaker. This switch will place all selected audio on the cock-
pit speaker when this switch is selected. Except for the unswitched audio, the speaker amplifier is not active
in the "Split Mode”.
Unswitched audio, (the inputs dedicated to autopilot disconnect, altimeter warning, etc.) will come through
the speaker regardless of the speaker button position.
Depending on installation, important audio annunciations such as radar altimeter or autopilot disconnect
will come over the speaker even if it is not selected, while other unswitched, but muted inputs, such as GPS
alerts, will only be present if the SPR button is selected. Consult your professional avionics installer for
these important configuration details.
3.5.1.1 Public Address Function
To access PA function, press the Mute and SPR buttons simultaneously. The pilot
microphone will be heard on the speaker when the pilot PTT is used. The copilot
can continue to use the selected com radio while the pilot will now be heard
over the speaker. During Public Address, the Mute and SPR buttons will
flash. To exit PA mode, push Mute and SPR again.
This function is not remembered when the audio panel is turned off.
3.6 Marker Beacon Operation (9)
The Marker Beacon Receiver uses visual and audio indicators to alert you when the aircraft passes over a
75 MHz transmitter.
The Blue lamp, labeled “O”, is the Outer Marker lamp and
has an associated 400-Hertz 'dash' tone. The lamp and tone
will be keyed at a rate of two tones/flashes per second when
the aircraft is in the range of the Outer Marker Beacon.
The Amber lamp, labeled “M”, is the Middle Marker lamp
and is coupled with a 1300 Hertz tone. It is keyed alternately