Configuring The Signal Gains - Polycom SoundStructure C16 Design Manual

Configuring The Signal Gains

Analog Gain
Analog Input
Input Signal Level Adjustment
Once the firmware transfer begins, the progress will be updated with a display
as shown in the following figure.
Upon completion of a successful firmware transfer, the SoundStructure device
will reboot and SoundStructure Studio will present the Connect to Devices
window to allow SoundStructure Studio to re-connect to the device. Wait for
the device to finish re-booting (front-panel green light stops flashing) and then
connect to the device.
If a firmware transfer is not completed successfully - perhaps because power
was lost to the device or the transfer cable was mistakenly pulled out - the
SoundStructure system will revert back to the firmware that was in the device
prior to the firmware update process was initiated.
Once the SoundStructure device settings are synchronized with SoundStruc-
ture Studio, either by uploading or downloading a configuration file, the next
step is to ensure the input signals have the proper analog gain to get to the 0
dBu nominal signal level of the SoundStructure devices.
SoundStructure devices may have gain applied in various positions through-
out the signal chain as shown in the following figure. Gain may be applied in
the analog input gain stage, the input fader, the matrix, the output fader, and
the output analog gain stage.
The analog input gain is applied in the analog domain to the analog input
signal to adjust the signal level to match the level required by the Analog to
Digital converter to properly digitize the signal with the required signal
fidelity.
Digital Processing
Input
A/D
Processing
Input Fader
The analog input gains are adjusted with the input gain slider on the Sound-
Structure Studio channels page. Any slider adjustments cause the mic_in_gain
command to be executed. The analog input gain slider provides an adjustable
range from -20 to +64dB of gain in 0.5dB gain steps and has a meter that shows
the input signal activity from -20 to +20 dBu as shown in the following figure.
Matrix
Output
Processing
Output Fader
Installing SoundStructure Devices
Analog Gain
Analog Output
D/A
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