Approval Basis; Specifications - PS Engineering PMA7000B System Installation And Operation Manual

A fail-safe mode connects the pilot headphone 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.
A six-station voice activated (VOX) intercom is included in the PMA7000B. This system has PS Engineer-
ing's exclusive IntelliVox® circuitry that eliminates manual adjustments. The system contains six separate
VOX mic circuits, and only opens the microphone channel in use.
The intercom system incorporates pilot isolate and crew modes, two independent stereo music inputs with
"Soft Mute," and flashing LED indicators for transmit indications. Intercom control is through two front
panel- mounted volume knobs and 3-position mode switch. The concentric volume controls the intercom
level for the pilot and copilot, while the outer knob controls the passenger intercom volume. Intercom
squelch is automatic.
A 3-light Marker Beacon receiver is integrated in the PMA7000B. This provides the necessary Marker
Beacon lights and audio indications necessary for an Instrument Landing System (ILS) approach.
1.4

APPROVAL BASIS -

TSO Approval.
The PMA7000B-series Audio Selector Panels are FAA approved under TSO C50c (Audio Amplifiers) and
TSO C35d (Marker Beacon Receivers). In addition, they are approved by the Joint Airworthiness Authori-
ties under JTSO C50C and JAR-TSO 2C35d.
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 (Software Considerations for Airborne Equipment) and ED- 18/DO-214
(Audio Systems Characteristics and Minimum Operational Performance Standards for Aircraft Audio Sys-
tems).
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 opera-
tion.
1.5

SPECIFICATIONS

Marker Beacon:
Audio Selector/Intercom:
APPLICABLE DOCUMENTS:
ENVIRONMENTAL Qualifications:
Operating Temperature Range:
Altitude:
DIMENSIONS:
WEIGHT (With Rack & Connectors):
POWER REQUIREMENTS (Including Internal Lighting):
Voltage:
Maximum Current:
200-780-0004
PS Engineering
PMA7000B Series Audio Selector Panel and Intercom System
Installation and Operator's Manual
TSO COMPLIANCE
Page 1-2
C35d, Class A
C50c, Class A
RTCA/DO-214 RTCA/DO-143 RTCA/DO-160C
RTCA/DO-178B
A1D1/CA(MN)XXXXXXBBBBTBKXX
-15º C to 55ºC
Up to 50,000 feet in an non-pressurized area
Height: 1.3 in. (3.3 cm) Width: 6.25 in. (16.9 cm)
Depth: 6.8 in. (17.3 cm)
1.5 lb. (0.54 kg)
11 to 33 VDC
2.5 Amp (Externally protected by a 3A pull-type
breaker)
Feb. 2004