PS Engineering PMA7000CAP Installation Manual - Manual (Page 5)

PS Engineering
PMA7000M-S Series Audio Selector Panel and Intercom System
Civil Air Patrol Version Installation and Operator’s Manual
200-072-0004 Page 1-2 Rev. 4, Sept. 2000
A six-station voice activated (VOX) intercom is included in the PMA7000-Series. This system
has PS Engineering’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 stereo music inputs with
"Soft Mute," and LED indicators for swap and transmit indications. Intercom control is through
front panel-mounted knob and 3-position mode switch. A single volume controls intercom level
for the pilot and copilot. Passenger headphone volume is factory set, and adjusted in flight with
headset-mounted volume controls. Passenger volume control is further adjustable through
screwdriver access in the top of the unit. Intercom squelch is automatic.
A 3-light Marker Beacon receiver is integrated in the PMA7000M-S. This provides the
necessary Marker Beacon lights and audio indications necessary for an Instrument Landing
System (ILS) approach.
1.4 APPROVAL BASIS - FAA
TSO Approval.
The PMA7000M-S, and PMA7000S 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 Authorities 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 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 operation.