566
Appendix A
Command Reference
VSPP
Vertical Sync Pulse Polarity
Class
Format parameter setting - Synchronization
Description
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.
Command syntax
VSPP
polarity
polarity
0 = high-to-low transition
1 = low-to-high transition
Query syntax
VSPP?
Query response
0 or 1
Other required
commands
In order to use digital vertical sync, it must be gated on with the
VSPG
command and
digital separate H and V sync must be selected with the
SSST
command. The
FMTU
command instructs the generator to use the new setting. The
ALLU
command updates
hardware to the new setting and redraws the test image.
Example
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
Summary of Contents for 802BT
Page 1: ...802BT 802R Video Test Generator User Guide ...
Page 52: ...42 Chapter 2 Testing Video Displays ...
Page 62: ...52 Chapter 3 Administrative Tasks ...
Page 118: ...108 Chapter 7 Using GPIB Interface ...
Page 194: ...184 Chapter 10 Testing EDID ...
Page 204: ...194 Chapter 11 Testing HDCP ...
Page 214: ...204 Appendix A Command Reference Commands by name ...
Page 595: ...Video Test Generator User Guide 585 ...
Page 611: ...Video Test Generator User Guide 601 ...
Page 612: ...602 Appendix A Command Reference ...
Page 716: ...706 Appendix B Image Reference ...
Page 744: ...734 Appendix C Error Messages ...