015-0075-00: Difference between revisions
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{{Instrument Sidebar | {{Instrument Sidebar | ||
|manufacturer=Tektronix | |manufacturer=Tektronix | ||
|model= | |model=015-0075-00 | ||
|class=Audio/Video | |class=Audio/Video | ||
|series= | |series= | ||
|summary= | |summary=Video Staircase Differentiator | ||
|image= | |image=Tek 015-0075-00 1.jpg | ||
|caption= | |caption=Tek 015-0075-00 | ||
|introduced=(?) | |introduced=(?) | ||
|discontinued=(?) | |discontinued=(?) | ||
| Line 16: | Line 16: | ||
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 with uniformly increasing luminance. | :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 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. | :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. | 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. | ||
Latest revision as of 07:00, 3 November 2021
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.
Key Specifications
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