PS Engineering PMA8000B X - Manual (Page 5)

202-890-0202 Page 5 June 2008 PMA8000B Pilot Guide
The telephone party will not hear ATC communications, and vice
versa.
In CREW mode, only the pilot and copilot are connected to the tele-
phone. 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 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 au-
dio is provided to the pilot.
Note: Because the cell-phone uses an intercom circuit, all sta-
tions on that circuit will lose intercom capability when the cell
phone is in use.
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 se-
lected. Except for the unswitched audio, the
speaker amplifier is not active in the "Split
Mode”.
Unswitched audio 1, 3 and 4 (the inputs dedi-
cated to autopilot disconnect, altimeter warning, etc.) may come
through the speaker regardless of the speaker button position.
Depending on installation, important audio annunciations such as ra-
dar 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.
Public Address Function
To access PA function, press the
Mute and SPR buttons simultaneously. The Mute and SPR LEDs
will blink to indicate the audio panel is in PA mode. The copilot can
continue to use the selected com radio while the pilot will now be
heard over the speaker. To exit PA mode, push Mute and SPR again.