Clear-Com AB-120 - Manual (Page 23)

Clear-Com Communication Systems
AB-120 Announcer Console Instruction Manual
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SPECIFICATIONS
Note: 0 dBu is referenced to 0.775 V RMS
Headset Microphone Input
Input Type Dynamic, Electret
Input Impedance 1K Ohms
Max Input Level -60 dBu to -40 dBu switchable
Headset Output
Load Impedance >= 4 Ohms
Output Impedance 47 Ohms
Output Limiter Threshold -4 dBu ± 3 dB
Max Output Level before Distortion -4 dBu
Party Line Output
Off Noise <-80 dBu
Output Impedance >10K Ohms
Maximum Output -4 dBu
Party Line Input
Maximum Level before Clipping +3 dBu
Sidetone Null Capability >25 dB
Frequency Response
Dynamic Mic - Party Line 40Hz - 22KHz, ± 3 dB
Dynamic Mic - Line Out 20Hz - 22KHz, ± 3 dB
Dynamic Mic - 4-Wire Out 100Hz - 22KHz ± 3 dB
IFB Input - Headset Out 100Hz - 22KHz ± 3 dB
Party Line - Headset Out 150Hz - 22KHz ± 3 dB
Max Distortion
Dynamic Mic - Party Line <0.1%
Dynamic Mic - Line Out <0.05%
IFB Input - Headset Out <0.5%
Party Line - Headset out <0.1%
Noise
Dynamic Mic - Party Line <-75 dBu
Dynamic Mic - Line Out <-85 dBu
IDFB Input - Headset out <-65 dBu
Party Line - Headset Out <-65 dBu
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