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LSPP
Class
Description
Command syntax
Query syntax
Query response
Other required
commands
Example
Appendix A Command Reference
742
Line Sync Pulse Polarity
Format parameter setting - Synchronization
Establishes the logic sense of the digital line sync output. Setting polarity to 1 causes the
leading edge of line sync to be a low-to-high transition. Setting polarity to 0 causes the
leading edge of line sync to be a high-to-low transition. The LSPP? query returns the
current polarity of LSPP.
LSPP polarity
polarity
0 = active-low (negative going pulse)
1 = active-high (positive going pulse)
FSPP?
0 or 1
In order to get a pulse, line sync must first be enabled with the
command instructs the generator to use the new settings. The
the hardware to the new settings and redraws the test image.
LSPG 1
// Enable Line Sync
LSPP 1
// Set for positive going pulse
LSPW 20
// Make the pulse 20 pixels wide
LSPG 300
// Pulse to occur 300 lines after
// the last line of active video
FMTU
// Update hardware to new settings
LS?
command. The
FMTU
ALLU
command updates
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