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Professional Audio System Components
2.1.9
Limiter Voltage Processor
1.914.519
Together with this voltage processor, the VCAs 1.914.518/528 can perform as signal level limiters.
The processorâs threshold can be set within a wide range of levels, so that limiting action becomes effective at a desired level within a range of â15 to +15 dBu. Limiting action attacks within 1 ms, whereas release can vary from 50 ms to 5 s, depending on the programâs energy content. This means that no audible âpumpingâ action â which is often associated with such a device â will occur. After the cessation of loud passages, amplification will recover only slowly. For stereo applications, a two-channel setup (VCAs and voltage processor) can be linked, so that identical amounts of gain reduction will take place simultaneously in both channels.
The input of the voltage processor has to be wired to the output of the VCA. The processorâs output, when connected to the VCAâs control terminal, will effect the necessary gain reduction so that a limiting characteristic is obtained. The limiting threshold is adjustable in a wide range. Remote on/off switching of the limiter function is possible.
Date printed: 29.11.01
E17
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