PS Engineering PMA8000MP3-Avidyne - Manual (Page 24)

PS Engineering
PMA8000B-MP3 Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0403 Page 3-3 Rev. 4, Jan. 2011
portable cellular phones with earpiece jacks. Pressing the TEL button activates the telephone mode.
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 communic a-
tions, and vice versa.
In CREW mode, only the pilot and copilot are connected to the t elephone. 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 PMA8000B-MP3 is in the TEL 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 access to Com
1 or 2, and will transmit on that radio using the PTT. All selected audio is provided to the pilot.
As shipped from PS Engineering, the PMA8000B-MP3 does not provide cellular telephone sidetone (the
user’s voice fed back to the headset). Some cell phones do not provide sidetone. In PMA8000B MP3
Avidyne audio panels above serial number C10251, Telephone sidetone can be enabled by pressing the
TEL and ADF buttons for more than one second. For units with serial number C10250 and below, an in-
ternal modification can be made that will allow the PMA8000B -MP3 to provide this sidetone. Contact PS
Engineering for more information.
NOTE
Because the cell-phone uses an intercom circuit, all stations on that circuit will lose intercom capabi lity
when the cell phone is in use.
3.5 Speaker Amplifier (5)
The SPR in the lower right section stands for speaker. This switch will place all selected audio on the
cockpit 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 (if enabled)
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.
3.6 Marker Beacon Operation (10)
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 with short 'dot' and long 'dash' bursts at 95 combinations per minute.
The White lamp, labeled “I”, is the Inner marker and has a 3000 Hertz 'dot' tone. The lamp and tone will
be keyed at a rate of six times per second.