Telex ANRTM 150 - Manual (Page 7)

Page 5
Specifications
Receivers and Noise Reduction Circuits:
Reciever Type: Dynamic
Frequency Response: 50 Hz - 1.5 kHz
Sensitivity (Max. Volume): 95 ± 5 dB SPL (1 kHz, 1 mW input per earcup
side)
Impedance (Max. Volume): Stereo: 300 ohms per side, Monaural: 150
ohms
Stereo/Mono: Switch in cord allows Stereo or Monaural headset
operation.
Noise Reduction Power Consumption: 50 mW nominal, 1.5W peak per
side (dependent on noise level)
Microphone and Amplifier:
Element Type: Noise-canceling amplified electret
Frequency Response: 100 Hz - 5000 Hz
Sensitivity: -51 ±3 dB (ref:1 V/ µbar at 1 kHz with 12 Vdc 150 ohm AC
load)
Matching Impedance: 50-600 ohms
Gain Adjustment Range: ± 5 dB (clockwise rotation increases gain)
Operating Voltage (supplied by aircraft radio): 8-16 Vdc
Microphone Interface: Operates from a typical aircraft radio per RTCA
DO-170; 8 to 16 Volts DC with 470 ohm DC resistance, 150 ohm AC
resistance
Power:
To turn Power on and off simply plug or unplug the battery or Aircraft
Power Module.
Batteries: One 9V alkaline battery installed in the battery module.
ANR Battery Life: 40 hours minimum
Fail-Safe Mode:
If battery power is too low for normal ANR operation or if the power
module is disconnected, the headset will perform like a standard
headset maintaining communications with the aircraft radio.