PS Engineering Inc. ®
PAR200A Audio Selector Panel, COM radio Controller and Intercom System
Installation and Operator’s Manual
200-228-0200
Page 2-7
Rev. 4, DEC. 2017
NOTE
FCC Regulations (47 CFR 22.925) prohibit airborne operation of cellular phones;
Cellular telephones installed in or carried aboard airplanes, balloons or any other type of aircraft must not
be operated while such aircraft are airborne (not touching the ground). When any aircraft leaves the ground,
all cellular telephones on board that aircraft must be turned off. The use of cellular telephones while aircraft
is on the ground is subject to FAA regulations.
FAA Regulation 14 CFR 91.21(5) allows for use of portable electronic devices that the operator of the air-
craft has determined will not cause interference with the navigation or communication system of the air-
craft on which it is to be used.
PS Engineering, Inc. does not endorse using unapproved cellular telephone equipment in flight, and takes
no responsibility for the user’s action. PS Engineering does not guarantee compatibility with personal cellu-
lar telephones. For a list of phones that have been tested, visit
www.ps-engineering.com
.
2.6.2
Telephone sidetone
The PAR200A is shipped from the factory with Telephone sidetone enabled. The PAR200A will provide cell
phone sidetone (your side of the telephone conversation) in the factory configuration. Some telephones al-
ready provide sidetone, and the PAR200A can be configured to disable internal sidetone by placing the DIP
switch in the proper configuration. Authorized PS Engineering installers should contact the factory for in-
structions.
J5 Switch 6
Cell phone sidetone created by audio panel
OFF
No cell phone sidetone
ON
Table 2-3 Telephone sidetone switch
2.6.3
"Swap" Mode
When a momentary, normally open, push-button switch is connected between pin 20 on the J2 connector and
aircraft ground, the user can switch between Com 1 and 2 by depressing this switch without having to turn
the mic selector switch. This yoke-mounted switch eliminates the need to remove your hands from the yoke
to change transceivers.
2.6.4
Backlighting
The PAR200A has an automatic dimming of the pushbutton annunciation LEDs controlled by a photocell.
Control of the unit backlighting is through the aircraft avionics dimmer. For 12-Volt aircraft, connect J2 Pins
6 and 7 to the aircraft dimmer bus, and pin 5 to ground.
The LCD display backlighting is controlled by the automatic photocell dimming. In addition, the text inverts
for nighttime mode when the ambient light is low.
If an external dimmer control is
not
used, a constant maximum back light illumination can be established for
viewing. Pin 6 or 7 (depending on system voltage) must be tied to power (J2, pin 8 or 9) for the back lighting
system to work. The photocell mounted in the unit face will automatically adjust the intensity of the push-
button annunciation green LEDs.
2.6.5
Unswitched inputs
J1, pins 31, 29 and J2 pin 15 are unswitched, unmuted (by transmitter keying), inputs # 1, 3 and 4, respec-
tively. These inputs are presented to the pilot and copilot regardless of the audio configuration, and will mute
the entertainment inputs based on the mode. These 510 Ω inputs can be used for altimeter DH audio, GPS
waypoint audio, autopilot disconnect tones, or any other critical audio signal. Unswitched #1 is always pre-
sented to the crew headphones, and is available to the pilot in fail-safe (off) mode.
