NRS70 Series
SECTION 4
NRS70OPS
070803 Version 1 Issue 2
www.snellwilcox.com
4.31
Decoder
This function allows settings to be made to the
color decoding section of the decoder.
Auto Gain Control
When this item is enabled the luminance gain will
vary relative to the input peak white amplitude.
This will maintain the output signal at a normalised
level even though the input signal level may be
above or below standard level.
The control will be effective over an input level
range of +1 dB to –6 dB.
Auto Color Control
When this item is enabled the chrominance gain
will vary relative to the input burst amplitude. This
will maintain correct color saturation regardless of
changes in subcarrier amplitude.
NTSC Hue
This selection displays a numerical readout display
for the Hue of NTSC signals. By using the scroll
bar the Hue may be adjusted by ±30 ° in steps of
1°.
Selecting Preset returns the setting to the
calibrated value of 0°.
PAL Line 23
Process As Video
When enabled line 23 of the PAL input signal will
be processed as active picture and the ProcAmp
controls will effect Line 23.
Process as Data
When selected line 23 is passed unprocessed and
the ProcAmp controls will not effect Line 23.
The Chroma information will not be decoded from
a Composite or Y/C source.
Blank Line 23
When enabled line 23 of the PAL input signal will
be blanked.
NTSC Line 21 & 283
This item allows various options to be applied to
line 21 and line 283 of an NTSC signal.
Process As Video
When enabled line 21/283 of the NTSC input
signal will be processed and the ProcAmp controls
will effect Line 21/283.
Process as Data
When
selected
lines
21/283
are
passed
unprocessed and the ProcAmp controls will not
effect Line 21/283.
The Chroma information will not be decoded from
a Composite or Y/C source.
Blank Line 21 & 283
When enabled line 21 & 283 of the NTSC input
signal will be blanked.
