PS Engineering PMA9000EX Pilot’s Guide - Manual (Page 8)

Page 8 PMA9000EX Pilot Guide Revision 5
the original level after communications have been completed. An
Alternate Intercom Function is available that prevents the passengers
from hearing aircraft radios in ALL mode. See Section 4.2 for details.
C REW : Pilot and copilot are connected on one intercom channel and
have exclusive access to the aircraft radios. Again, the music that the
crew and passengers will hear is controlled in the music distribution
setup.
3.3 Intercom Volume Control (7)
The small volume control knob adjusts the loudness of the intercom
for the pilot and copilot. It has no effect on
selected radio levels, music input levels or
passengers' volume level.
The larger, outer volume control knob con-
trols intercom volume for the passengers. It
has no effect on radio or music levels.
Adjust the radios and intercom volume for a
comfortable listening level. Most general
aviation headsets today have built-in volume
controls; therefore, volume also can be fur-
ther adjusted at the individual headset.
3.3.1 Mono Headsets in Stereo Installation
The pilot and copilot positions work with stereo or mono headsets.
All passenger headsets are connected in parallel. Therefore, if a mon-
aural headset is plugged in to a PMA9000EX Stereo installation, one
channel will be shorted. Although no damage to the unit will occur,
all passengers will lose one channel, unless they switch to the
“MONO” mode on the headset.
4.0 EnCoder And Push Switch interface (ECAPS)
(8)
ECAPS is a system that consists of two encoding data knobs and a
push-push switched integral into the small data knob. These control
the menu, submenus, and selection of items for control.
The primary menu contains frequently accessed items: SPR (cockpit
Speaker), TEL (telephone) MKR (Marker audio), and MUTE (music
mute control).
Pressing the small knob for two (2) seconds will activate the sub
menus. Submenus contain: ADF, DME and AUX audio, MP3 and