HP 54616B User And Service Manual page 179

PAL Phase Alternating Line or
Phase Alteration Line rate. Color
television standards used in Europe.
A 625 line, 50 Hz field system. Eight
fields for picture completion.
PAL-M Phase Alternating Line or
Phase Alteration Line rate. A version
of the European system adapted to
a 525 line, 60 Hz field, 4.2 MHz band-
width used in Brazil.
SECAM SEquentiel Couleur Avec
Memoire. An acronym derived from
the French phrase meaning Sequen-
tial Color with Memory. Color
television specifications used primar-
ily in France and the former Soviet
Union. A 625 line, 50 Hz field, wide
bandwidth system. Two frames (4
fields) required for
picture completion
Sync An abbreviation for the
words "synchronization," "synchroniz-
ing," etc. Applies to the
synchronization signals, or timing
pulses, which lock the electron beam
of the picture monitors in step, both
horizontally and vertically, with the
electron beam of the pickup tube.
The color sync signal (NTSC) is
known as the color burst.
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