Hitachi vl-21a instruction manual Color RED Blue Yellow Burst

Models: vl-21a

1 23
Download 23 pages 53.6 Kb
Page 21
Image 21

9.2.2. Color Reproduction

TEST CONDITIONS

Refer to “Measurement Conditions”

 

 

MEASURING SYSTEM

System 1

 

 

PROCEDURE:

 

 

 

1. Shoot the color bar chart and zoom WIDE or TELE to fit the chart to the monitor.

2.Measure the color amplitude and color phase on the vector scope of Red, Blue, and Yellow.

(Before the above measurement, Adjust the burst amplitude and phase on the vectorscope so that the burst level becomes 100% and its phase becomes 180°.

SPECIFICATION:

COLOR

RED

 

BLUE

YELLOW

BURST

 

 

 

 

 

 

Amplitude (%)

150 ±40%

100 ±40%

125 ±40%

100%

 

 

 

 

 

 

Phase ( ° )

98 ± 20°

348 ± 20°

182 ± 20°

180°

 

 

 

 

 

 

9.2.3. Luminance S/N

 

 

 

 

 

 

 

TEST CONDITIONS

 

Refer to “Measurement Conditions”

 

 

 

 

 

MEASURING SYSTEM

 

System 1

 

 

 

 

 

 

 

 

PROCEDURE:

 

 

 

 

 

 

 

 

 

 

 

1.Shoot the light box and zoom WIDE or TELE to fit the chart to the monitor.

2.The noise meter settings are:

 

Input Level

:

Preset

 

High Pass Filter

;

100KHz

 

Low Pass Filter

:

4.2MHz

 

Sub-carrier Trap

:

On

 

Weighting

:

On

 

Sag & Hue Comp.

:

Optimum

3. Measure the maximum S/N on the noise meter.

 

 

 

 

 

 

SPECIFICATION:

More than 50 db (NTSC)

 

 

21

Page 21
Image 21
Hitachi vl-21a instruction manual Color RED Blue Yellow Burst