PS Engineering
PMA450B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-450-0600
Page 1-2
Rev. 5, August 2020
knob controls the intercom level for the pilot and copilot, while the large knob controls the passenger inter-
com volume. Intercom squelch is automatic.
PMA450B part numbers 050-450-0601 and -0602 contain a 75 MHz Marker Beacon receiver and 3-light
indicator. This provides the necessary Marker Beacon lights and audio indications necessary for that portion
of an Instrument Landing System (ILS) approach. A pushbutton labeled MKR allows the pilot select audio
on as well as test and mute modes. Marker high sensitivity is also controlled by this button.
The front panel USB-type connector is available for charging devices, such as iPad or cell phones. Up to 15
Watts and 3.5 Amps are available. This connector
does NOT
provide any data interface.
In the PMA450B, a Bluetooth® wireless interface is available for wireless telephone and music connection.
Our newest innovation is flightmate®, a tool that can improve flight safety and reduce workload. flightmate
allows the user to store four audio messages that can be trigged by cockpit signals when connected for safety
alerts.
APPROVAL BASIS
FAA TSO Approval
The PMA450B-series Audio Selector Panels are FAA approved under TSO C139A (Audio Amplifiers) TSO
C35d (Marker Beacon Receivers) and C71 (DC Power Supplies)
All systems comply with relevant portions of EUROCAE RTCA MPS WG No. 7/70, DO-143 and (
Marker
Beacon Receivers
), ED-14C/DO-160G (
Environmental Conditions and Test Procedures for Airborne Equip-
ment
), ED12B/DO-178B, Level D (
Software Considerations for Airborne Equipment
) and ED- 18/DO-214A
(
Audio Systems Characteristics and Minimum Operational Performance Standards for Aircraft Audio Sys-
tems
).
1.4.1
Limitations
This article meets the minimum performance and quality control standards required by a technical standard
order (TSO). Installation of this article requires separate approval.
Refer to Advisory Circular 20-41A for information on TSO installation approval.
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.
