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Design Guide for the Polycom SoundStructure C16, C12, C8, and SR12
7 - 16
Output Signal Levels
Output signals from the SoundStructure device are connected to various other
devices including audio amplifiers, recorders, and video codecs. For best per-
formance, the output signal levels of the SoundStructure devices should match
the expected signal levels of the next device that is attached.
The SoundStructure default output signal level of 0 dBu is the correct level
when connecting to most professional audio equipment. When connecting to
consumer equipment, such as equipment that requires an RCA-style connec-
tor the SoundStructure output gain should be reduced to -10dB to prevent
overdriving the input stage on the consumer equipment. The output gain set-
tings are found at the bottom of the channels page as shown in the following
figure. The gain may be set to +4dB if required to connect to devices that
require a +4dBu nominal input signal level. Negative gain adjustments (< 0)
are applied in the analog domain at the digital to analog converter. Adjust-
ments made to the output level in the highlighted slider are not shown in the
fader meter.
Once the output level has been set appropriately for the next piece of equip-
ment in the signal chain, volume adjustments should be done with the fader
control and adjustments in level made in the fader will be shown as more or
less signal in meter next to the fader control.