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Video Test Generator User Guide 297
DSST
Digital Sync Separate Type
Class Format parameter setting - Digital video signal
Description Establishes the type of digital separate sync that appears at the digital HS and VS outputs
of the generator when digital composite sync is selected via the SSST command and the
outputs are gated on via the HSPG and VSPG commands. The only difference between
EIA and CCIR digital separate syncs is that, in the case of CCIR, the width of the vertical
sync pulse is 0.5 line shorter than the width specified via the VSPW command. In the EIA
case, the width of the vertical sync pulse is as programmed.
After sending the DSST command, send the FMTU or ALLU command.
Command syntax DSST type
type
0 = none
1 = American separate
2 = American HDTV separate
3 = European HDTV separate
4 = Japanese HDTV separate
5 = European separate
Query syntax DSST?
Query response Returns the current setting of DSST. A setting of zero (0) indicates that separate digital
H&V sync cannot be activated by the operator.
Example
DSST 1
FMTU // Update hardware to current buffer contents
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