11-STEP GRAY SCALE TEST CHART 16:9 / BT.709

                                               REFLECTIVE

Two 11-graduated counter current gray scales are arranged on a gray background

(D ≈ 0.56), the gray scale corresponds to the ITU recommendation BT.709.

The output signal of an optimally gamma-corrected camera according to BT.709 generates

two counter current, linear step signals.

The contrast range of the gray scale is 40 : 1.

The values of the 11-graduated gray scale are as follows:

*The production process for reflective charts allow a maximum printed density of 1.64.

The target value for the darkest step is 1.70. Therefore the distance of the last step differ slightly.

Two black fields and a white field are located between the gray scales. The density of the

black fields in the middle is D > 3 (remission < 0.1 %), the white field between has a density

of 0.05 (remission 89.9%).

Recommended usage:

Adjust the aperture until the lightest patch reaches 100% video signal at the waveform

monitor. With an optimally corrected camera according to ITU recommendation BT.709

the darkest patch will reach 10% signal level.

When using this chart with a gamma correction of 0.45 the video signal level for each

step will change as listed in the table above.