PS Engineering
PMA450B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-450-0600
Page 3-11
Rev. 5, August 2020
When both Bluetooth modules are set as Bluetooth inputs, the user could use BT1 an alert input from a tablet
with aviation application, such as Foreflight and BT2 as a music input.
The combination of Music 1 and Bluetooth 2 (must be configured as a Music input), is available for the crew
positions.
Figure 3-5 Music distribution menu with multiple Bluetooth modules (Part Number -0601 and -0701
only)
NOTE:
BT1
should be used for applications that provide voice announcements or checklists to avoid clipping
of words.
In Copilot as Passenger Mode, Passengers are designated Front (was copilot) and “rear” (was passenger).
Figure 3-6 Music distribution menu, Copilot as Passenger
NOTE:
All music devices should be turned off for takeoff, landing, or any critical phase of flight. FAA Regulation
14 CFR 91.21 restricts the use of portable electronic devices.
§91.21 “(a) Except as provided in paragraph (b) of this section, no person may operate, nor may any operator
or pilot in command of an aircraft allow the operation of, any portable electronic device on any of the fol-
lowing U.S.-registered civil aircraft. . .
“(b)(5) Any other portable electronic device that the operator of the aircraft has determined will not cause
interference with the navigation or communication system of the aircraft on which it is to be used.”
You can refer to Advisory Circular 91.21-1A for more information, at
3.10.1 Music Muting
The SoftMute™ circuit will mute the music whenever there is conversation on the radio, the intercom, or
both, depending on the “Mute” mode selected. When that conversation stops, the music returns to the previ-
ous level comfortably, over a second or so.
The mute mode functions are controlled through Music Mute Menu that has
three
modes for each music
input. Mute ALL, Mute Off “Karaoke” & Radio Mute.
