Northern Airborne Technology 247 - Manual (Page 5)

Model 247 Audio Mixing Amplifier
SM247 Installation and Operation Manual
Section 1 Rev: 1.00 Issue 2 Page 1-2
ENG-FORM: 800-0115.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Output impedance: 100
Ω
Frequency Response: Flat within +3dB from 300 to 6,000 Hz
Distortion: <1% THD+N from 300 to 6,000 Hz
Gain Range: >12 dB
Output: 4.5 Vrms (33mW) into 600
Ω, Outputs are current limited
Note: Model 247-001 includes bi-polar output capacitors for
compatibility with DC biased loads such as microphone inputs
Mic bias 18 Vdc at 30 mA (600
Ω source impedance) individually selectable
1.4.2 Physical Specifications
Height 41.40 mm (1.63 in) maximum
Depth 76.96 mm (3.03 in) maximum
Width 76.96 mm (3.03 in) maximum excluding flanges
102.36 mm (4.03 in) maximum including flanges
Weight 0.6 kg (0.42 lbs)
Enclosure Conversion coated aluminum
Mounting Bulkhead Mount: four # 8 screws
1.4.3 Environmental Specifications
Temperature -55
° to +70° C
Altitude -15,000 to 70,000 feet
Qualification of the Model 247 Audio Mixing Amplifier was completed in accordance with
RTCA/DO-160C Env. Cat. [A2F2]-BA(CL)XXXXXXZ(BZ)AAATZ(XXC2)XX
Note: Refer to Environmental Qualification Form located in Section 2 of this Manual for complete details
of the environmental categories.
1.4.4 Product Approval
FAA: TSO-C50c (RTCA/DO-214 Class I b, RTCA/DO-160C).
Section 1 ends