PS Engineering
PMA450B Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-450-0600
Page 1-3
Rev. 5, August 2020
1.5
SPECIFICATIONS
TSO COMPLIANCE
Marker Beacon
:
FAA TSO C35d, Class A
Audio Selector/Intercom
:
FAA TSO C139a, Class 1a
DC Charging Jack
FAA TSO C71
APPLICABLE DOCUMENTS:
RTCA/DO-214A RTCA/DO-143 RTCA/DO-160G
RTCA/DO-178C, DO-254
ENVIRONMENTAL Qualifications
:
A1D1CABSMXXXXXXZBABATBXXE2XXX
Operating Temperature Range:
-15º C to 55ºC
Altitude
:
Up to 35,000 feet in a non-pressurized area
DIMENSIONS:
Height: 1.3 in. (3.3 cm) Width: 6.25 in. (15.9 cm)
Depth behind panel 7.15 in. (18.16 cm)
WEIGHT
PMA450B Unit
Rack with connectors
1.34 lb. (0.61 kg)
0.51 lb. (0.24 kg)
POWER REQUIREMENTS
(Including Internal Lighting):
Voltage
:
11 to 33 VDC
Maximum Current
:
3.5 Amp (Externally protected by a 5A pull-type breaker)
Audio Selector Specifications
Audio selector panel input impedance
:
510
Input Isolation
:
-60 dB (min.)
Speaker Muting
:
-60 dB (min.)
Speaker Output
(into 4
) with no clipping
14 VDC:
28 VDC:
3 Watts (min.)
10 Watts (min.)
Receiver Inputs
:
7 (Com 1, Com 2, Nav 1, Nav 2, 2 ea. Additional switched
inputs available for ADF, DME, etc.)
Unswitched Inputs
:
4 (Two switched inputs can be converted to unswitched, if
desired, during installation.)
Transmitter Selections
:
3 (Com 1, Com 2, Com1/2)
Speaker Impedance
:
4
Headphone Impedance
:
150 – 1000
Headphone Output
:
30 mW each headset, no clipping <.5% THD typical
Microphone Impedance
:
150 - 600
Bluetooth® Radio
Class 3, FCC ID
QOQWT32AE or QOQWT32I
Intercom Specifications
Intercom Positions
:
6 places (with individual
Intelli
Vox® circuits)
Music Inputs
:
2, (Independent, Stereo)
Music Muting
:
>-30 dB "Soft Mute" when Com or intercom active.
Distortion:
<1% THD @ 30 mW into 150
Mic Freq. Response, 3 dB:
300 Hz - 6000 Hz
Music Freq. Response, 3 dB
:
10 Hz – 26 kHz
