Peavey X-VCA - Manual (Page 137)

p. 137
output limiter functions
The X-VCA provides output limiters inserted in the main output circuits following the L/R
Stereo and Mono master faders.These limiters function with an RMS characteristic, and will
therefore pass short term program peaks without attenuation or audible signal degradation.
The X-VCA output limiters are best used for system protection, or to aid the operator in
keeping within maximum sound levels as set by local noise ordinances.
To set the output limiters:
1.Turn the limiter function on - Press the LIMIT ON button to activate the lim-
iter function. Note that the limiter function affects the respective main outputs only.
The Alternate, Monitor and Assisted Listening outputs are not affected by the lim-
iters.
2. Set the output limiter threshold - Set the control to the input signal level at
which limiting function is desired. Input signal above the threshold will cause a lev-
eling of the output signal at a ratio of greater than 20:1. Initial onset of limiting is a
modified rapid soft-knee characteristic before hard limiting occurs. The threshold
control may be set for onset of limiting at any output level between -6dBu and
+20dBu.
The eight segment ATT output meter displays effect of output limiting. The top seg-
ment indicates limiter function is ON. The remaining seven segments indicate
amount of signal attenuation when master bus signal exceeds the set threshold.
Note: Caution should be exercised if the output ATT meter shows constant atten-
uation, or significant attenuation at frequent intervals. This could indicate some
deterioration of the output signal quality.
Note: EXTREME caution should be observed when turning the limiter function
off. If the limiter is currently attenuating the output, removing the limiter from the
circuit could result in a sudden increase in output signal with possible damage to
speakers.
9 dynamics control