Cci R System B And Similar 625/50 Systems (Including Pal) - Tektronix 465B Instruction Manual

CCI R System B and Similar 625/50 Systems
(including PAL)
In most 625-line, 50 Hz field-rate systems, identifica-
tion of parts of the picture relies primarily on continuous
line numbering rather than on field-and-line identification,
except for PAL systems.
The CCI R frame starts with the first (wide) vertical sync
pulse following a field which ends with a half-line of video.
The first line after the second equalizing interval is line 6;
the first picture line is line 23 (half-line of video). The first
field of the frame contains lines 1 through the first half of
line 313, the picture ending witha a full line of video (line
310).
The second field of the frame commences with the
leading edge of the first (wide) vertical sync pusle (middle
of line 313). and runs through line 625 (end of equalizing
interval). The first full line after the equalizing interval is
line 318; the picture starts on line 336 (full line).
The first field is referred to as "odd," the second field as
"even." Note that the identification systems for System M
and System B "re reversed.
In the four-field PAL sequence with Bruch Sequence
Color-burst blanking, the fields are identified as follows:
Field 1: Field that follows a field ending in a half-line of
video, when preceding field has color burst on the
last full line. Field 1 lines are 1 through 312 and
half of line 313. Color burst starts on line 7 of
Field 1; a half-line of video appears on line 23.
Field 2: Field that follows a field ending in a full line
which does not carry color burst. Field 2 lines are
the last half of line 313 through line 625. Color
burst starts on line 319 (one line without burst
following the last equalizing pulse); a full line of
video appears at line 336.
Field 3: Field that follows a field ending in a half line when
preceding field has no color burst on its last full
line. Field 3 lines are 1 through the first half of
line 313. Burst starts on line 6 (immediately
following the last equalizing pulse); a half-line of
video appears on line 23.
Field 4: Field that follows a field ending in a full line
carrying color burst. Field 4 lines are the second
half of line 313 through line 625. Color burst for
Field 4 starts on line 320 (two full lines without
burst follow the last equalizing pulse); video starts
with a full line on line 336.
106 465B/DM44 Operators
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