Crown AMB-5 User Manual page 144

background noise may keep the gate open all the time.
When a signal exceeds the Threshold, the gate opens almost instantly. The optimum Threshold setting depends
on the signal. Speech varies more rapidly than music, and often needs a lower Threshold to keep the gate open.
For a microphone, the Threshold can be set a few decibels above a room's ambient sound for ambience rejection,
or set higher to reject incoming far-field or off-axis sounds.
Tip: The Display screen (press
signal level, making it a simple matter to select an appropriate Threshold level. For example, it is quickly
apparent from the Display screen that the gate will not open if the Threshold control is set at a higher level than
the input signal.
Delay Time: The Delay Time control determines how long the gate will stay open after the incoming signal
drops below the Threshold. The optimum Delay Time setting depends on how rapidly the input changes. If a
speaker walks slowly from one mic to another, you will probably want to use a long Delay Time for each mic to
prevent an audibly abrupt cutoff. At a conference however, when debaters compete for microphones, a shorter
Delay Time would probably be more appropriate.
The following list shows the possible settings for each Gate function control. Note: All dB settings are dBu.
Max Gain: Off; –99½ dB to +25 dB in ½ dB steps
Low Set: Off; –99½ dB to +25 dB in ½ dB steps
Gate: On/Off
Threshold: Off; –99½ dB to +25 dB in ½ dB steps
Delay Time: 0.2, 0.4, 0.6, 0.8, 1, 1.5, 2, 3, 4, 6, 8, 10, 12, 15, 20, 30 seconds
Page 144
@) is very helpful when setting the Threshold controls. It displays the input
IQ–MSD Turbo 1.4 Advanced IQ System Software