PS Engineering
PMA8000B-MP3Avidyne Version (-0403) Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0403
Page 1-2
Rev. 4, Jan. 2011
There are five unswitched inputs, available for traffic or EGPWS, autopilot disconnect, and/or radar a l-
timeter warning, with the fifth unswitched input through a front -mounted utility jack, when configured to
act as a fifth unswitched input.
Pushbuttons select the receiver audio source provided to the headphones. A SPR button allows the user to
listen to the receiver(s) selected on the cabin speaker. Except for the unswitched inputs, all speaker audio
is muted during transmit. Unswitched inputs 1,3, and 4 are always presented to the aircraft speaker.
Unswitched input 2 will be presented to the speaker when the front panel SPR push button has been se-
lected.
Pushbutton switches select one of the communication transceivers for the pilot and copilot position, and
allows radio transmission. In "Split Mode" the PMA8000B-MP3 has the ability to allow the pilot to
transmit on Com 1 while the copilot can transmit on Com 2. A fail -safe mode connects the pilot head-
phone and microphone to COM 1 if power is removed for any reason, or if the power switch is placed in
the Off (Fail-safe) position. Unswitched input #1 is also provided to the pilot headphone in fail -safe
A six-station voice activated (VOX) intercom is included in the PMA8000B-MP3. This system has PS
Engineering’s patented
IntelliVox®
circuitry that eliminates manual adjustments. The intercom system
incorporates pilot isolate, all and crew modes, two independent stereo music inputs with "SoftMute™".
Intercom volume control is through two concentric front panel knobs and a pushbutton intercom mode
switch. The small volume knob controls the intercom level for the pilot and copilot, while the large knob
controls the passenger intercom volume. Intercom squelch is automatic.
A 3-light, 75 MHz Marker Beacon receiver is integrated in the PMA8000B-MP3. This provides the neces-
sary Marker Beacon lights and audio indications necessary for that portion of an Instrument Landing Sys-
tem (ILS) approach. A pushbutton labeled MKR allows the pilot select high or low sensitivity as well as
test and mute modes.
1.4
APPROVAL BASIS
FAA TSO Approval
.
The PMA8000B-MP3-series Audio Selector Panels are FAA approved under TSO C50c (Audio Amplifi-
ers) and TSO C35d (Marker Beacon Receivers), ETSO C50C/ and 2C53d.
All systems comply with relevant portions of EUROCAE RTCA MPS WG No. 7/70, DO-143 and (
Marker
Beacon Receivers
), ED-14C/DO-160C (
Environmental Conditions and Test Procedures for Airborne
Equipment
), ED12B/DO-178B, Level D (
Software Considerations for Airborne Equipment
) and ED-
18/DO-214 (
Audio Systems Characteristics and Minimum Operational Performance Standards for Air-
craft Audio Systems
).
Operation is subject to the following conditions:
This device may not cause harmful interference.
This device must accept any interference received, including interference that may cause undesired oper a-
tion.
1.5
SPECIFICATIONS
TSO COMPLIANCE
Marker Beacon
:
FAA TSO C35d, Class A ETSO 2C35d
Audio Selector/Intercom
:
FAA TSO C50c, Class 1a ETSO C50c
APPLICABLE DOCUMENTS:
RTCA/DO-214 RTCA/DO-143 RTCA/DO-160D
RTCA/DO-178B DO-254
ENVIRONMENTAL Qualifications
:
A1D1CABSMXXXXXXZBABATBXXE2XXX
Operating Temperature Range:
-15º C to 55ºC
Altitude
:
Up to 50,000 feet in an non-pressurized area
DIMENSIONS:
Height: 1.3 in. (3.3 cm) Width: 6.25 in. (16.9 cm)
Depth behind panel 7.15 in. (18.16 cm)
