User's Manual

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Specifications are subject to change without notice.
User GuideBlueBridge Designer II
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: [phone] • Fax: [phone]
Gating Auto Mixer - The gating auto mixer would typically be used in a conference setting where multiple Mics are in use but only one
(or a few) should be on at any time. This module turns on Mics based on their input signal as compared to the level of the other Mics.
Once a channel is activated it typically stays on until another signal is larger (someone else starts to speak). More sophistication is
available with number of open Mics, priority and sensitivity controls.
Each input has a Mute and Gain (-100 to 16 dB, 0.01dB steps) control. An RMS Meter (-80 to 40 dB, 0.1 dB steps) and Auto Gain meter
(-100 to 0 dB, 0.1 dB steps) are included to show the input level and the calculated gain for each channel. Manual On changes the gain
from automatic (off) to fixed (on). The Priority parameter ranges from 0 to 10 (with 0 being the highest and 10 the lowest). An input
channel with a higher priority needs less level to be gated on by increasing the input by 2 dB/priority step. The Sensitivity parameter
(-16 to 12dB in 0.01dB steps) determines at what level the channel is gated on compared to the automatically determined threshold. For
example if the sensitivity is set to -1dB, an input signal above -1dB of the threshold will be gated on.
For the output, Gain (-100 to 16 dB, 0.01 dB steps) and Mute control are provided. The time for a Mic to be gated off is set by the Hold
Time (50 to 6000 ms, 0.001 ms steps). The Off Gain (-90 to -10 dB, 0.1dB steps) determines the gain for an off channel. Last Mic On
mode determines which Mic stays on when no one is talking. This can be set to none, last Mic used or a specific input. The maximum
number of open (on) Mics is set by the number of Open Mics. The Open Mic Attenuation (0 to 6dB, 0.01 dB steps) attenuates the
output by the set amount whenever the number of open Mics is doubled.
Fig 127