INTEGRATING THE UNIT INTO YOUR SYSTEM
© Polycom, Inc. 15 VORTEX EF2211/EF2210 Reference Manual
Fine tune the Input Gain using the Automatic Gain Con-
trol (AGC) meter on Conference Composer Software. In
the Conference Composer Software, go to the D
IAGNOSTICS page. Watch the meter
labelled AGC while someone is talking into the particular channel that you are adjust-
ing. Watch the number in the box at the bottom of the AGC meter (See Figure 7
below). This is the amount of gain that the AGC is applying. The goal is to have the
AGC meter on average staying around 0. If the level that you see in the box is nega-
tive, decrease the input gain by the average number that you see in the box because
the AGC is attenuating the channel’s input gain because the level is too high. If the
number in the box is positive, increase the input gain on that channel because the
AGC is boosting the signal because it is too low. For example, if the meter is showing
an average gain of -15 dB, you should increase your input gain by 15 dB. If the meter
shows an average gain of +10 dB, you should decrease your input gain by 10 dB.
Figure 7. AGC Meter on the Diagnostics page of the Conference Composer soft-
ware. The gain adjustment is the same gain control on the Mic/Line Inputs page in
Conference Composer.
I
F THE AGC METER SHOWS... ADJUST THE INPUT GAIN IN THIS WAY.
positive gain Increase gain by the level
shown in the box.
negative gain Decrease gain by the level
shown in the box.
Table 1: How to set the Input Gain using the AGC meter on the Conference
Composer Diagnostics page.
AGC Level Meter
Read AGC level
Adjust Input Gain here
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