TBS100/100D
SECTION 4
TBS100OPS
20/10/06
www.snellwilcox.com
Version 2 Issue 5
4.5
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Decoder
This function allows settings to be made to the
decoder section.
Decoder
Auto Gain Control
Auto Chroma Control
PAL Line 23...
NTSC Line 21/283...
PAL Chroma Averager
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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 +3 dB to -6 dB.
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Auto Chroma Control
When this item is enabled the chrominance gain will
vary relative to the input burst amplitude. This will
maintain correct colour saturation regardless of
changes in subcarrier amplitude.
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PAL Chroma Averager
When selected this will provide PAL Hanover bar
suppression.
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PAL Line 23
This item allows various options to be applied to
line 23 of the input signal.
625
AutoDetect
PAL Line 23
Process As Video
Pass Line 23
Blank Line 23
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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.
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Pass Line 23
When selected (text reversed) the first half line of
line 23 is passed unprocessed, the second half line
is blanked and the ProcAmp controls will not effect
Line 23.
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Blank Line 23
When enabled line 23 of the PAL input signal will be
blanked.
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NTSC Line 21/283
This item allows various options to be applied to
line 21/283 of the input signal.
625
AutoDetect
NTSC Line 21/283
Process As Video
Pass Line 21/283
Blank Line 21/283
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Process As Video
When enabled line 21/283 of the input signal will be
processed and the ProcAmp controls will effect Line
21/283.
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Pass Line 21/283
When selected (text reversed) lines 21/283 are
passed unprocessed and the ProcAmp controls will
not effect Line 21/283.
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Blank Line 21/283
When enabled line 21/283 of the input signal will be
blanked.
Note that the first half of line 283 on the composite
(NTSC) output is always blanked.