Troubleshooting guide

Modular Processors
SHURE
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P4800 System Processor Software Guide Page 42 of 108
Threshold
This indicates the level the signal gain must reach before the processor increases it.
Signal levels below the threshold are passed through the processor at unity gain. You
can change the value by clicking on the spin buttons, typing in a specific value, or using
the threshold slider above the transfer curve graph. The available range of values is from –60VU to
+20VU in 0.5VU increments, with a default value of 0VU.
Ratio
This indicates the amount of gain reduction you are achieving at the output of the
processor, relative to the input level that exceeds the hinge. A setting of 4:1, for example,
means that a 4dB increase in the level of the program material results in a 1dB increase in
the output level from the processor. You can change the value by clicking on the spin buttons, typing in a
specific value, or using the ratio slider on the right-hand side of the transfer curve graph. The range of
available values is from 1:1 to 10:1, in increments of a tenth, with a default value of 2:1.
Attack
This indicates how much time the processor waits before responding to rising or falling
input levels, once the input level exceeds the threshold, The available values are from
0.2s to 3s, with a default value of 2 seconds.
Decay
This indicates how much time the processor waits before returning to unity gain, once
the input level increases or decreases closer to the hinge setting. The range of available
values is from 0.5s to 5s, with a default value of 5 seconds.
Hinge
The hinge setting is the target output level of the AGC. It is a pivot point that determines
whether the input level is raised or lowered. Signal levels below the hinge (but above the
threshold) will be raised and levels above the hinge will be lowered. You can change the
value by clicking on the spin buttons, typing in a specific value, or using the hinge slider below the
transfer curve graph. The available range of values is from –60VU to +20VU in 0.5VU increments, with
a default value of 0VU.
Default
Click this button to reset the processor to its system default settings.
Bypass
Click to pass signal through without the effect of the processor. When bypass is active, the button
appears lighted in red. The default setting is inactive.
Bypass active
Bypass inactive
Snapshot
This feature allows you to freeze an image of the current response curve by clicking the
[Take] button. You can then display it in the background for comparison by clicking the
[Show] button. The [Show] button appears lighted in green when the snapshot is
displayed. For a more in-depth description of the snapshot feature, see the Snapshots
section on page 33.