Quantum Data 881 User Manual page 950

VSPP
Class
Description
Command syntax
Query syntax
Query response
Other required
commands
Example
572 Appendix A Command Reference
Vertical Sync Pulse Polarity
Format parameter setting - Synchronization
Establishes the logic sense of the digital vertical sync outputs. Setting polarity to 1 causes
the leading edge of vertical sync to be a low-to-high transition. Setting polarity to 0 causes
the leading edge of vertical sync to be a high-to-low transition. The VSPP? query returns
the current polarity of VSPP.
VSPP polarity
polarity
0 = high-to-low transition
1 = low-to-high transition
VSPP?
0 or 1
In order to use digital vertical sync, it must be gated on with the
digital separate H and V sync must be selected with the
command instructs the generator to use the new setting. The
hardware to the new setting and redraws the test image.
VSPP 1 // Set active hi V sync in buffer
VSPG 1 // Enable V sync output in buffer
SSST 1 // Select H&V sync type in buffer
FMTU // Update hardware to current buffer contents
VSPG command and
SSST command. The FMTU
ALLU command updates