GATE
A Gate is used to mute a signal whenever its level falls below a specific threshold. This, for example, is
useful to suppress unwanted noise of an open microphone channel.
Element Default Range Description
This indicator signals in dB by how much the gate
reduces the signal level. A red bar that increases from
the right to the left indicates the degree of gain
reduction.
-60.0 dBu
or
0.001 V
-84.0...-25.0
dBu or
0.000...0.044 V
The THRESHOLD parameter defines the level value up to
which the Gate mutes the signal. As long as the signal
level is below the set threshold, the signal stays muted.
As soon as the signal level at the input reaches or
exceeds the threshold, the signal is transmitted. The
signal’s level, however, is not altered..
5 ms 5...150 ms The ATTACK parameter defines the speed at which the
Gate opens. Short attack times result in the signal being
transmitted, even if it exceeds the threshold only for a
very short time.
125 ms 5...1000 ms HOLD defines how long the gate keeps transmitting the
signal after the signal level has dropped below the
threshold.
250 ms 10...1000 ms RELEASE defines the time that it takes to mute the
signal after the HOLD period has passed.
BYPASS activates (not engaged) or deactivates
(engaged) the gate.
IRIS-Net DIGITAL MATRIX | en 416
Bosch Security Systems B.V. User Manual 2017.05 | 3.20 | F.01U.119.956
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