882 Video Test Instrument User Guide (Rev A.35) 123
Configuring special sync for FS, LS, or CS
The special sync output can provide frame sync, line sync, or composite sync signals. The
output is controlled by setting parameters of these signals using the command line
interface. The following commands are used to set the special sync signal:
•
FSPG
- Frame sync
•
PSPG
- Probe signal
•
LSPG
- Line sync
•
CSPG
- Composite sync
Note: 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 of
interlaced video, the frame pulse is output at the beginning of the blanking interval (of the
first field) that immediately precedes the top line of active video.
To configure frame sync on the special sync output:
1. Establish a session with the generator using either HyperTerminal over a serial
connection or Telnet over an Ethernet LAN. See “Establishing a terminal session with
the 882” on page 30 or “Establishing a Telnet session with the 882” on page 33.
2. Enable the frame sync by entering the following command:
FSPG 1
The values of the other parameters (
LS? and CSPG
) do not matter once FSPG is
enabled.
FSPG=1, FSPP=0
FSPG=1, FSPP=1
FSPW (pixels)
FSPD (lines)
ActiveBlank Blank Active
Field 0 Field 1
VSPD (lines)
VID
VS
FS
FS
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