802BT/802R Video Test Generator User Guide 201Configuring special sync for FS, LS or CSThe special sync output can provide frame sync, line sync, or composite sync signals. Theoutput is controlled by setting parameters of these signals through the command lineinterface. The following commands are used to set the special sync signal:• FSPG - Frame sync• PSPG - Probe signal• LSPG - Line sync• CSPG - Composite syncNote: The special sync output is disabled whenever these parameters are set to zero.A frame pulse can be generated and output at the beginning of each frame. In the case ofinterlaced video, the frame pulse is output at the beginning of the blanking interval (of thefirst field) that immediately precedes the top line of active video.To configure frame sync on the special sync output:1. Enable the frame sync by entering the following command:FSPG 1The values of the other parameters (LSPG and CSPG) do not matter once FSPG isenabled.2. Set the frame pulse polarity (either 0 for low or 1 for high) by entering the followingcommand:FSPP 1FSPG=1, FSPP=0FSPG=1, FSPP=1FSPW (pixels)FSPD (lines)ActiveBlank Blank ActiveField 0 Field 1VSPD (lines)VIDVSFSFS
