015-0075-00: Difference between revisions
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The Tektronix 015-0075-00 Video Staircase Differentiator is intended | The '''Tektronix 015-0075-00 Video Staircase Differentiator''' is intended | ||
for measuring luminance nonlinearity in analog video systems. | for measuring luminance nonlinearity in analog video systems. | ||
The typical setup for this measurement is as follows: | The typical setup for this measurement is as follows: | ||
A video signal generator produces a pattern with a few vertical bars | A video signal generator produces a pattern with a few vertical bars | ||
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The output is differentiated by the 015-0075-00 and viewed on an oscilloscope, | The output is differentiated by the 015-0075-00 and viewed on an oscilloscope, | ||
triggering on the row sync signal. | triggering on the row sync signal. | ||
If the system under test has linear luminance response, | If the system under test has linear luminance response, | ||
the luminance waveform at its output will be a uniform staircase, | the luminance waveform at its output will be a uniform staircase, | ||
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Tek 015-0075-00 2.jpg | Tek 015-0075-00 2.jpg | ||
</gallery> | </gallery> | ||
[[Category:Audio and Video test equipment]] | |||
Revision as of 01:37, 10 September 2017
The Tektronix 015-0075-00 Video Staircase Differentiator is intended for measuring luminance nonlinearity in analog video systems.
The typical setup for this measurement is as follows: A video signal generator produces a pattern with a few vertical bars with uniformly increasing luminance. The signal is applied to the device or system under test. The output is differentiated by the 015-0075-00 and viewed on an oscilloscope, triggering on the row sync signal.
If the system under test has linear luminance response, the luminance waveform at its output will be a uniform staircase, and differentiating it will produce a series of pulses of equal amplitude. Deviations from linearity, e.g., dynamic compression, will be seen as pulses of decreasing amplitude.
