PS Engineering PMA8000 Pilot’s Guide - Manual (Page 4)

4 202-890-0000 PMA8000-Series Pilot Guide
The users can identify which receivers are selected by noting which green
switch LEDs are lit. Navigation aid audio push buttons are labeled Nav 1, Nav
2, MKR (Marker), ADF and AUX (auxiliary). DME audio (if present) will
come through when the AUX button is selected. When one of these buttons is
pressed, the mode is active, and the LED will illuminate. Press the switch again
and it will be "off" and remove that re-
ceiver from the audio output.
In SPLIT mode, only the pilot will hear
selected navigation audio.
Telephone (TEL) (9)
The TEL mode serves as a full duplex interface and distribution for telephone
systems such as AirCell or portable cellular phones with earpiece jacks. Press-
ing 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 head-
sets. 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 communica-
tions, 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 PMA8000 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.
Note: Because the cellphone uses an intercom circuit, all stations on that
circuit will lose intercom capability when the cellphone is in use.
Speaker Amplifier (5)
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 selected. NOTE:
Except for the unswitched audio, the speaker amplifier is not active in the
"Split Mode”.
Unswitched audio, (the four inputs dedicated to
autopilot disconnect, altimeter warning, etc.) will
come through the speaker regardless of the speaker
button position.
202-890-0000 9 PMA8000-Series Pilot Guide
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 Bea-
con.
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.
The audio from the Marker Beacon Receiver can be heard by selecting the
"MKR" push-button switch. To adjust the volume level, there is a service ad-
justment located on the top of the unit.
A pushbutton is used to set the receiver sensitivity and to test the indicator
lamps mute the marker audio.
Use "HI" sensitivity initially. This allows you to hear the outer marker beacon
about a mile out. Then touch the smaller MKR button to switch into Low Sen-
sitivity mode. “LO” sensitivity gives you a more accurate location of the Outer
Marker. Holding the MKR button for one second activates marker test lamp,
labeled "T/M" and illuminates all three lamps simultaneously to assure the
lamps (internal and external) are in working order. TST does not activate MM
autopilot sense output. Releasing the button returns to the last sensitivity.
Pressing the marker mode select (“T/M”) for one second will also cause the
marker audio to mute for that beacon. The next beacon received will re-activate
the audio.
Optional Internal Recorder System (Option 1)
The Intercom Recording System is a digital recording system allowing auto-
matic storage and playback of aircraft radio traffic.
Operating as a continuous loop recorder, (first message received will be the
last heard), the recorder has one minute of recording time or up to 16 mes-
sages. With its own built in VOX circuit, there are no buttons to press to start
recording. The system automatically begins to record the instant the radio be-
comes active. Only aircraft radio audio in pilot’s headset is recorded and only
the pilot will hear the playback audio.
Operation
Recording is automatic. To play back the last recorded message, simply press
the switch associated with the IRS. Each additional press of the button will
play the preceding recorded message. You must wait for the message to finish
playing before accessing the prior message. To cancel the playback, press and
hold the playback button for two seconds. The next time the button is pressed,
the next earlier message will be heard.