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NOTES REGARDING LIMITER SETTINGS
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The recommended limiter threshold settings provide 3 dB of headroom before the
component or bandpass peak voltage is reached.
•
The component or bandpass peak voltage is 6 dB above the voltage used at continuous
maximum power.
•
These settings assume the use of a I-T amplifier in stereo mode with input sensitivity of
1.3V for a voltage gain of 36 dB.
•
If a different amplifier is used or if the input sensitivity is changed, the limiter threshold
must be re-calculated.
•
Not all DSP controllers behave the same way. Please study your unit accordingly.
•
Users must take into consideration that the digital controller gain outputs are not all “0”
dB, i.e. for VT4889/4880, the VLF is at +6 dB, the LF is at 0 dB, the MF is at -2.5 dB and
the HF is at –4 dB. Hence, the actual headroom before limiter threshold is effectively
greater than it may seem from the above charts.
•
Users should carefully test these settings, and lower or raise the thresholds for a given
type of program material as required.
