PS Engineering Aerocom III User Manual
aerocom® III
Portable Stereo Intercom
with
P
ILOTS
P
ILOTS
IntelliVox®
G
G
UIDE
UIDE
Flying Never Sounded So Good®
aerocom® III Operation Manual Page 1
200-003-0002 Rev 5 September 2013
Congratulations on your purchase
of the PS Engineering Inc® aerocom 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 aircraft radio connection.
An entertainment input allows the
pilot and copilot to listen to stereo
music during flight. During radio or
intercom activity, this music automatically 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 position, (isolation mode) only the pilot is
connected to the aircraft radio for undisturbed 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 capabilities. 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 connector (not provided) can be used to
provide a input. Use a NON ATTENUATING type interface cable.
The entertainment will be automatically 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
Page 2 Operation Manual aerocom® III
200-003-0001 Rev 5 September 2013
Push to Talk
Part of the aerocom III operation
includes the use of PTT (Push-ToTalk) switches (not included) that allow the use of your aircraft communications radio for transmissions.
There are several possible configurations. Only the person pressing their
PTT will be heard over the radio.
If the aircraft has a control wheel
mounted PTT for the pilot, and only
pilot transmission is desired, no action
is required (See Fig. 1).
A/C Panel,
Mic and Headphone jacks
If there is no PTT installed, and only
the pilot position desires to transmit,
connect a remote PTT between the
aerocom III and aircraft mic jack, as
shown in Fig 3.
If both pilot and copilot positions are
A/C Panel,
Mic and Headphone jacks
Re mote
PTT
Pil ot Hea dset
switch
aerocom III
Fig. 3– Pilot ONLY PTT with portable switch
Copilot Headset
Pil ot Hea dset
aerocom III
Copilot Headset
Fig. 1– Pilot PTT built-in control wheel
For copilot transmit capability, a
modified (See Appendix A) external
PTT switch must be connected to the
copilot’s microphone jack.
You must connect the push to talk
switches into the aerocom III microphone inputs, and then insert your
headset into the PTT cable (Fig. 2).
A/C Panel,
Mic and Headphone jacks
Pil ot Hea dset
aerocom III
Fig 2– Pilot built-in, copilot PTT with external switch
Copilot Headset
Copilot
Re mote
PTT
switch
to talk on the radio, two modified (see
Appendix A) external PTT switches
are required, as shown in Fig 4.
Most after-market Push to Talk
A/C Panel,
Mic and Headphone jacks
Pilot Headset
Pilot
Remote
PTT
switch
Fig. 4– Pilot and copilot PTT using MODIFIED portable switches
aerocom III
Copilot Headset
Copilot
Remote
PTT
switch
switches must be modified before use
with the aerocom III. This is because
the microphone audio circuit is opened
by the switch, and no signal can reach
the intercom when not transmitting.
See Appendix A. PS Engineering can
provide a modified PTT for $24.95.
Call 1-800-ICS-AERO to order.
Input Power
The aerocom III is powered by a
aerocom® III Operation Manual Page 3
200-003-0002 Rev 5 September 2013
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