Tektronix 1760 series, User Manual

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Basic Measurements
1760 Series Component Waveform/Vector Monitor User Manual
4-7
NTSC
The chrominance vectors terminate in a system of graticule
targets consisting of two boxes (a small box inside a large
box). A sample target is shown in Figure 4-4. The dimen-
sions of the large boxes represent
±
10
°
centered on the ex-
act chrominance phase, and
±
20% of chrominance
amplitude centered around standard amplitude. The dimen-
sions of the smaller boxes represent
±
2.5
°
and
±
2.5 IRE.
R
°
°
°
°
°
°
°
°
Figure 4-4.
Vector targets --- NTSC values (PAL values in parentheses).
PAL
For the 1761 graticule, each PAL chrominance vector related
to the +V burst terminates in targets consisting of two boxes
(a small box inside a large box). See Figure 4-2. The large
box represents
±
10
°
centered on the exact chrominance
phase and
±
20% of chrominance amplitude centered around
standard amplitude. The dimensions of the inner target rep-
resent
±
3
°
and
±
5% of chrominance amplitude; the vectors
associated with the --V burst terminate in the smaller targets.