Quantum Data 881 User Manual page 733

FSPP
Class
Description
Command syntax
Query syntax
Query response
Other required
commands
Example
882 Video Test Instrument User Guide (Rev A.35)
Frame Sync Pulse Polarity
Format parameter setting - Synchronization
Establishes the logic sense of the digital frame sync output. Setting polarity to one (1)
causes the leading edge of frame sync to be a low-to-high transition. Setting polarity to
zero (0) causes the leading edge of frame sync to be a high-to-low transition. The FSPP?
query returns the current polarity of FSPP.
FSPP polarity
polarity
0 = active-low (negative going pulse)
1 = active-high (positive going pulse)
FSPP?
0 or 1
To get a pulse, frame 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.
FSPG 1 // Enable Frame Sync
FSPP 1 // Set for positive going pulse
FSPW 20 // Make the pulse 20 pixels wide
FSPG 300 // Pulse to occur 300 lines after
// the last line of active video
FMTU // Update hardware to new settings
FSPG command. The FMTU
ALLU command updates
355