PS Engineering Aerocom III - Manual (Page 2)

Page 2 Operation Manual aerocom® III
200-003-0001 Rev 5 September 2013
Congratulations on your purchase
of the PS Engineering Inc® aero-
com III®, the intelligent choice in
portable intercoms. Please read this
manual fully to take advantage of
the aerocom III features.
Description
The aerocom III is a 2-place portable
intercom with individual IntelliVo®
circuits for the pilot and copilot. The
IntelliVox® (Voice Activated Squelch
or VOX) prevents mic audio from
getting through the intercom until
someone speaks and automatically
opens the circuit. The volume control
adjusts the intercom level for both
headsets and functions as the power
switch.
The aerocom III has an automatic,
fail-safe connection to the aircraft
radio. In the event that power to the
intercom is lost, or it is turned off, an
internal relay will immediately connect
the pilot's headset directly to the air-
craft radio connection.
An entertainment input allows the
pilot and copilot to listen to stereo
music during flight. During radio or
intercom activity, this music automati-
cally mutes to allow communications
without distraction. A SoftMute™
circuit gradually returns the music to
full volume after the radio or intercom
activity ceases.
The 2-position switch acts as a mode
selector. In the ALL position, each
position will hear the aircraft radio,
music, and each other. In the ISO posi-
tion, (isolation mode) only the pilot is
connected to the aircraft radio for un-
disturbed radio communications. In
ISO, the pilot is no longer on the inter-
com
.
The copilot will continue to hear
the music input.
With the aerocom III, both the pilot
and copilot have radio transmit capa-
bilities. Only the person who presses
their Push To Talk (PTT) will be heard
over the aircraft radio. If both pilot and
copilot press the PTT, the copilot will
override.
Specifications
Internal Power: 9 VDC battery
(Duracell MN1604, or equiv)
External Input power: 12-28 Volts DC
Headphone Impedance: 150-1000 ΩTypical
Total audio power available: 80 mW
Audio Distortion:
<10% @ 75 mW into 150 Ω load
Aircraft Radio Impedance: 1000 Ω Typical
±3 dB Mic Frequency Response:
600 Hz-2800 Hz
±3 dB Music Frequency Response:
200 Hz - 15 kHz
Net weight: 10.5 Ounces
Dimensions: 4.375” L x 3.250” W x 1.500” h
The aerocom III is designed to work
with either 12 or 28 volt DC negative
ground systems. The aerocom III
power cable is internally protected
with a 3-amp fuse.
Entertainment Input
A low-cost entertainment device
(CD player, cassette player, etc.) can
be connected to the aerocom III. An
interface cable with a ⅛" stereo con-
nector (not provided) can be used to
provide a input. Use a NON AT-
TENUATING type interface cable.
The entertainment will be automati-
cally muted when the ICS becomes
active.
When the intercom or radio traffic
ceases, PS Engineering's SoftMute
circuit will allow the music to return
slowly to the previous level