Bosch IRIS-Net User Manual page 416

IRIS-Net
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
Bosch Security Systems B.V.
Default Range
-60.0 dBu -84.0...-25.0
or dBu or
0.001 V 0.000...0.044 V
5 ms 5...150 ms
125 ms 5...1000 ms
250 ms 10...1000 ms
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.
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..
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.
HOLD defines how long the gate keeps transmitting the
signal after the signal level has dropped below the
threshold.
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.
User Manual
DIGITAL MATRIX | en 416
2017.05 | 3.20 | F.01U.119.956