Northern Airborne Technology MB01 - Manual (Page 5)

MB01-001Matching Box
SM72 Installation and Operation Manual
Section 1 Rev: 1.00 Issue 4 Page 1-2
ENG-FORM: 800-0114.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Output Signals
Quantity
18 Receive outputs
8 Microphone outputs
Audio level
2 Vrms nominal for receive outputs
2 Vrms nominal for sidetone outputs
0.5 Vrms nominal for microphone outputs
Impedance 600
Ω ±10% for microphone outputs
375
Ω ±10% for receive outputs
Distortion
<10% THD @ Rated power output
Circuitry Type
All are balanced outputs
Keylines
Floating or direct PTT
≤0.5 A at 30 Vdc Resistive handling current
≤0.1 A at 30 Vdc Inductive handling current
DF Mute
Keylines are diode OR’ed and produce a summed output on
each of the receiver cards
1.4.2 Physical Specifications
Height 3.15" (80.1mm)
Depth 4.00" (101.6 mm)
Width
8.11" (206.0 mm)
Weight 2.5
lbs
Mounting Bulkhead mount with four 10-32 screws
Material/Finish
Chassis & cover are 5052-H32 brushed aluminum with chromate
conversion finish
Connectors
Six male 37-pin D-submin connectors with Positronics V5 locking
tabs, and one female 62 pin high density D-submin connector
with Positronics V5 locking tabs
1.4.3 Environmental Specifications
Temperature
Operating
-40
° C to +70° C DO-160C Cat. B4
Survival -55
° C to +85° C
Altitude 25,000 ft. Max.