Polycom HDX series Reference Manual page 339

Integrator's Reference Manual for Polycom HDX Systems
D - 2
Characteristic
Frequency Response
Balanced Inputs, Relative to 997 Hz
Total Harmonic Distortion + Noise vs.
Frequency
1 dBFS Input Level
20 dBFS Input Level
Phantom Power
DC Voltage Level, Relative to Shield
Termination
DC Operating Current
Fault Current
Source Impedance
Value
+0.5, 3 dB, 20 Hz to 50 Hz
1 dB, 50 Hz to 20 kHz
+0.5, 3 dB, 20 kHz to 22 kHz
80 dB, 20 Hz to 22 kHz
70 dB, 20 Hz to 22 kHz
+48, 4 Volts
10 mA
16 mA
6.8 k, 1%