Clear-Com IF4W4 - Manual (Page 15)

I F 4 W 4 4 - C H A N N E L F O U R - W I R E I N T E R F A C E 3 - 1
TECHNICAL SPECIFICATIONS
IF4W4 4-CHANNEL FOUR-WIRE INTERFACE
dBu is an absolute measurement. 0 dBu is referenced to 0.775 volts RMS
Program Line Input
Input Impedance >= 1KΩ
Party Line Output
Output Impedance >10KΩ
Stage Announce/Balanced Line Out
Type Balanced
Output Impedance >= 80Ω
Load Impedance >= 600Ω
Frequency Response
Program Input - Party Line 200 - 18KHz ± 3dB
Party Line - Line Out 200 - 18KHz ± 3dB
Max Distortion
Program Input - Party Line <= 0.2%
Party Line - Line Out <= 0.5%
Noise
Program Input - Party Line < -85dBu
Party Line - Line Out < -60dBu
Max Gain
Program Input - Party Line >= -16dB
Party Line - Line Out >= 24dB
Min Gain
Program Input - Party Line <= -20dB
Party Line - Line Out <= -45dB
Line Out LED Threshold
Green -7dBu ± 2dB
Red +5dBu ± 2dB
Party Line LED Threshold
Green -10dBu ± 2dB
Red 0dBu ± 2dB
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