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Intercom User Station US2002 - 36
External Power
Type: 2.0 mm power jack
Internal pin: positive (+)
External shell: negative (-)
Headphone Amplifier
Voltage Gain: 30 ±3 dB
Maximum Output: 250 mW ±10% into 150 ohms, 65 mW±10% into 600 ohms
Frequency Response: 200 Hz to 8 kHz +1/-3db
Incoming Call Beep Tone: 2 kHz, at the headphones
Total Harmonic Distortion: Less than 0.2% at 200 mW
Sidetone: 18 ±2 dB, adjustable
Panel Microphone Amplifier
Voltage Gains:
Mic to CHN; 25±3 dB, before limiting
Mic to Headphone; adjustable, 45 dB ±10% maximum, into 150 ohms
Mic to PA; 15 ±3 dB, 235 mVrms ±10%
Frequency Response: 200 Hz to 8 kHz +1/-3dB
Total Harmonic Distortion: Less than 0.2% at CHN output
VOX Range: -75 to -30 dB, -60 dB factory set