202-890-0202
Page 7
Feb. 2009 PMA8000B Pilot Guide
It is also a good idea to keep the microphone out of a direct wind
path. Moving your head through a vent air stream may cause the
In-
telliVox
® to open momentarily. This is normal.
The
IntelliVox
® is designed to work with normal aircraft cabin noise
levels (70 dB and above). Therefore, it may not always recognize
speech and clip syllables in a quiet cabin, such as in the hangar, or
without the engine running. This is also normal.
Intercom Volume Control (7)
The small volume control knob adjusts the
loudness of the intercom for the pilot and copi-
lot. It has no effect on selected radio levels,
music input levels or passengers' volume level.
The larger, outer volume control knob controls
intercom volume or 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 further
adjusted at the individual headset.
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 PMA8000B 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. PS Engineering modifies headsets to
add stereo capability, using high-fidelity speakers. Contact factory
(865-988-9800) for details.
Intercom Modes (8)
The “
ICS
” pushbutton switch on
the left side of the panel provides
the selection of the three intercom
modes. The description of the
intercom mode function is valid
only when the unit is not in the
"Split" mode. Then, the pilot and
copilot intercom is controlled
with the
Mute
button.
