Quantum Data 802BT, User Manual

Page: 574 / 744

564 Appendix A Command Reference
VSPD
Vertical Sync Pulse Delay
Class Format parameter setting - Synchronization
Description Establishes the delay between leading edge of blanking in the first (or even) field and the
leading edge of the vertical sync pulse. When interlacing, delay between end of video and
leading edge of vertical sync before second (or odd) field is 0.5 line shorter than the
whole-line delay specified. The VSPD? query returns the current setting of the vertical
sync pulse delay.
Command syntax VSPD lines
lines
min =0 (when SCAN = 1) or 1 (when SCAN = 2)
max = VTOT-VRES-VSPW (when SCAN = 1) or [(VTOT-VRES-1) /2]-VSPW (when
SCAN = 2)
Query syntax VSPD?
Query response lines
Other required
commands
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
VSPD 11 // Set V sync delay to 11 lines in buffer
FMTU
// Update hardware to current buffer contents