Manual Niagara SCX V6.0 (page 88 of 108) (English)

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Chapter 11: Tuning Utilities

82 Viewcast

Parameter

Description

on the video.

The processing within a vectorscope and the display of the processed signals readily detects and

evaluates both phase and gain distortions of the chrominance.

Understand the Display

The vectorscope display has two parts: the graticule and the trace.

Table 27. Vectorscope Display Parts

Part

Description

Graticule

 A scale you use to quantify the parameters of the signal under

examination.

 Work with a color bar signal.

 Remember, the color bar’s signal consists of brightness

information (luminance) and high frequency color information

(chrominance or chroma).

Trace

The video signal itself. The demodulated chrominance signals

electronically generate it.

Each bar of the color bar’s signal creates a dot on the vectorscope's display. The position of

these dots remains relative to the boxes, or targets, on the graticule. The phase of the burst

vector represents the major indicators of the chrominance (color) signal's health.

Within the circle, you see six target shapes each containing smaller, sectioned shapes (Figure

102). The smaller shapes designate where each dot of the color bar’s signal should fall if the

chroma gain and phase relationships are correct.

Figure 102. Vectorscope with Color Outside the Targets

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Niagara SCX V6.0 Manual

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