Specifications

Integrator’s Reference Manual for Polycom HDX Systems
C–2 Polycom, Inc.
DTMF Dialing
The Polycom HDX 9000 series systems generate the following tip/ring signal
levels:
• Low-frequency tone: -10.2 dBV, -8.0 dBm when AC termination of the line
is 600 Ohms
• High-frequency tone: -8.2 dBV, -6.0 dBm when AC termination of the line
is 600 Ohms
Input Impedance
Audio Input 3 (VCR/DVD) Differential 20 k, ±5% Ohms
Input Common-Mode Rejection Ratio
Balanced Inputs, Common-Mode
Amplitude 1 dBFS >60 dB, 20 Hz to 22 kHz
Maximum Output Level
Balanced Outputs (10 k Load) +12 dBV (4.0 V
RMS
), ±1 dB
Output Impedance
Balanced Outputs 150, ±5% Ohms
Signal-to-Noise Ratio >90 dB, A-weighted
Dynamic Range >90 dB
Crosstalk and Feed-Through  90 dB, 20 Hz to 22 kHz
Frequency Response
Balanced Inputs, Relative to 997 Hz +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
Total Harmonic Distortion + Noise vs.
Frequency
-1 dBFS Input Level
-20 dBFS Input Level
-80 dB, 20 Hz to 22 kHz
-70 dB, 20 Hz to 22 kHz
Phantom Power
DC Voltage Level, Relative to Shield
Termination
DC Operating Current
Fault Current
Source Impedance
Phantom Power is not supported on
Polycom HDX 9006 systems.
+48 V
DC
±4 V
10 mA
16 mA
6.8 k, ±1%
Characteristic Value