Ensemble Designs 5470 Digital Processing Amplifier and Legalizer User Manual
Page 19
Model 5470 Digital Proc Amp and Model 5475 DNR
The Legalizer menu allows you to enable the Legalizer function to limit the input signal
black and white clip levels and the chroma clip levels with the following controls:
•
Legalizer – set the legalizer function to one of the following:
Off – to disable it.
Legal – to apply the following factory preset parameters:
•
B/W Clip is On.
•
Black Clip is set to – 2.5 IRE.
•
White Clip is set to + 105 IRE.
•
Chr Clip Mode is Predictive Composite.
•
Chr Lo Clip is set to – 20 IRE.
•
Chr Hi Clip is set to + 120 IRE.
Custom to use the controls described below to set custom parameters.
•
B/W Clip – select On to enable Black and White Clip functions or Off to
disable them.
•
Black Clip – set the threshold for the black clip level to between – 8 and +
6.2 IRE (no content will be allowed below the level set).
•
White Clip – sets the threshold for the white clip level to between 95 and
110 IRE (no content will be allowed above the level set).
•
Chr Clip Mode – select Off for no chroma clip functions. Select Chroma to
use the Chr Lo Clip and Chr Hi Clip controls to clip the chroma content
(irrespective of the luminance). Select Cpst to enable the Predictive
Composite Clipper. This mode allows you to ensure that when the signal is
encoded to PAL or NTSC the minimum and maximum chroma excursions do
not exceed preset levels. Because in composite video, the chroma rides on
the luminance, this clip mode is based on chroma and luminance values.
•
Chr Lo Clip – set the low chroma clip level to between – 40 and 0 IRE
(– 20 typical).
•
Chr Hi Clip – set the high chroma clip level to between 100 and + 140 IRE
(+ 120 typical).
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