Tektronix 1740A/1750A - Manual (Page 88)

Basic Measurements
1740A/1750A Series Waveform/Vector Monitor User Manual
4-7
Vector Graticule
The VECTOR display permits measurements of hue in terms
of the relative phase of the chrominance signal with respect
to the color burst. Relative amplitude of chrominance to
burst is expressed in terms of the displacement from center
(radial dimension of amplitude).
The vector graticule is combined with the waveform grati-
cule.
The NTSC and PAL vector graticules contain burst and vec-
tor targets; the dual-standard graticules contain burst and
vector targets for both NTSC and PAL standards. The vector
targets can be used with either 75% or 100% amplitude color
bar signals. The selection is made through the
CONFIG—VEC-
TOR menu, described on page 3-18.
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.