ADInstruments S7200 Operation Manual page 267

AD INSTRUMENTS S7200 TV Signal Analyzer Operation Manual
signals, color bursts, and other format-specific information, like the ITS, which are
not part of the active video image. Approximately 90 percent of all the lines and
80 percent of each line can transmit the active image information. The exact
values depend on the video format, as shown in above table.
"Active Lines" represents the number of lines that are actually used to transmit
the image information. For example, only 480 lines out of 525 lines per frame
transmit the image information in NTSC. Likewise, on each line, the image
information is transmitted only during the active lines sequence, which is shorter
than the entire line duration. For example, of 63.55 µs, only 52.2 µs are the active
line duration in NTSC. Frame rate is the scanning speed.
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