dbx 160X - Page 10

160XT
OPERATING NOTES
Using the COMPRESSION RATIO control
When an input signal is above the THRESHOLD reference level, the set¬
ting of this control determines the number of decibels by which the input
signal must change in level to produce a IdB increase in the signal level
at the output of the 160XT. A setting of 2:1 indicates an input:output ratio
wherein a 2dB increase in signal (above threshold) will produce a IdB in¬
crease in output signal. A setting of °°:1 indicates that an infinite increase
in input level would be required to raise the output level by IdB. In other
words, the output level is constant when the input signal is above thresh¬
old.
The 160XT’s RATIO control covers the entire range from 1:1 to °°:1 and,
in addition, goes to Infinity-*- (negative) ratios. At a setting of-1:1, the
above threshold input signal must increase by IdB in level to decrease
the signal at the output of the 160XT by IdB. See Figure 5.
The control curve of the RATIO potentiometer has been designed to pro¬
vide total operator control, with scale expansion at the subtle lower ratios
for easy, repeatable settings.
Figure 5: Ratio control and lnfinity+ (Negative)
Ratios
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