Crestron C2VEQ-4 Operations & Installation Manual page 17

Crestron C2VEQ-4
Operations & Installation Guide - DOC. 6136
Volume/Equalizer Control Expansion Card
A TrimBand value of 0 (0dB) means that the signal will pass unaffected. Values
above and below 0 boost or reduce the gain in increments of .1dB. That is, changing
the analog value by one signifies a change in boost or attenuation of 0.1 decibel.
The C2VEQ-4 provides ten trim presets, where a trim preset is a set of all forty
TrimBand values.
On the rising edge of <SaveTrimPreset>, the forty TrimBand values will be stored
in the preset specified by <TrimPreset#>. Valid values for <TrimPreset#> range
from 1 to 10.
On the rising edge of <RecallTrimPreset> the values stored in the indicated
<TrimPreset#> will be recalled and propagated to the outputs. Here the
<TrimBand#-#_FB> outputs may have different values than the TrimBand inputs
(the only time these values will differ).
If <RecallTrimPreset> goes high and <TrimPreset#> is set to an invalid value (out
of the 1 to 10 range) all trim settings will be cleared, and all signals will pass with
whatever gain setting was in effect. This is the same as recalling a trim preset in
which every TrimBand value is set to 0.
A rising edge of <ClearTrims> will also set all TrimBand values to 0.
The Trim Controls symbol is illustrated below and on the next page; the tables
following the illustrations provide join details.
Trim Controls Symbol
Volume/Equalizer Control Expansion Card: C2VEQ-4 • 13