Testing Conditions

TSH70,71,72,73,74,75

22/33

The electrical characteristics show the influence of the load on this parameter.

5.3

Video capabilities

To characterize the differential phase and differential gain, a CCIR330 video line is used.

The video line contains 5 (flat) levels of luma on which is superimposed chroma signal. The

first level contains no luma. The luma gives various amplitudes which define the saturation

of the signal. The chrominance gives various phases which define the color of the signal.

Differential phase (respectively differential gain) distortion is present if a signal chrominance

phase (gain) is affected by luminance level. They represent the ability to uniformly process

the high frequency information at all luminance levels.

When differential gain is present, color saturation is not correctly reproduced.

The input generator is the Rohde & Schwarz CCVS. The output measurement was done by

the Rohde and Schwarz VSA.

Figure 48. Measurement on Rohde and Schwarz VSA

Table 7.

Video results

Parameter

Value

Value

Unit

Lum NL

0.1

0.3

%

Lum NL Step 1

100

100

%

Lum NL Step 2

100

99.9

%

Lum NL Step 3

99.9

99.8

%

Lum NL Step 4

99.9

99.9

%

Lum NL Step 5

99.9

99.7

%

Diff Gain pos

0

0

%

Diff Gain neg

-0.7

-0.6

%

Diff Gain pp

0.7

0.6

%