Tektronix 1740A/1750A Manuel d'utilisateur télécharger pdf (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 ampl itude. The dimen-

sions of the smaller boxes represent ±2.5° and ±2.5 IRE.

1 2 ... 83 84 85 86 87 88 89 90 91 92 93 ... 142 143

Pas de commentaire

Tektronix 1740A/1750A Manuel d'utilisateur Page 88