Specifications

Vertical Blanking Interval The
blanking portion at the beginning of
each field. It contains the equalizing
pulses, the vertical sync pulses, and
VITS (if desired). Presently 18 to 21
lines in duration.
Vertical Interval Reference (VIR)
A signal used as a reference for am-
plitude and phase characteristics of
a color television program (FCC as-
signed to line 19).
Vertical Interval Test Signal
A signal which may be included dur-
ing the vertical blanking interval to
permit in-service testing and adjust-
ment of video transmission.
Glossary
Glossary–7