Making Audio Connections - Polycom SoundStructure C16 Hardware Installation Manual

Hardware Installation Guide for the Polycom SoundStructure
At rates at or above 38,400 bps, it is recommended that flow control be enabled on the control system.
The maximum length of an RS-232 cable is determined by the overall capacitance of the cable. For practical
purposes, the length of the RS-232 cable should not exceed fifty feet.

Making Audio Connections

SoundStructure devices provide balanced audio input and output connections that are terminated with 3.5
mm terminal blocks. For each balanced analog input or output on the SoundStructure rear-panel, the first
pin should be connected to the positive signal, the second pin is connected to the negative signal, and the
third pin is chassis ground as shown in the balanced audio connections in the following figure. To connect
the SoundStructure device's audio input and output to unbalanced audio equipment, follow the wiring in the
unbalanced audio connections below.
Balanced and Unbalanced Audio Connectors
When using unbalanced audio sources or audio destinations connected to SoundStructure devices, either
wiring techniques shown previously for connecting RCA jacks to terminal blocks may be used and both will
result in the same voltage level at the tip of the RCA jack.
Polycom, Inc.
2 1
1 2
3
3
XLR Female
XLR Male
Balanced Audio Connections
S
T S
T
T S T S
S S
T T
Unbalanced Audio Connections
T R S
S
R
T
T S
S
T
23