Video and General Performance Verification
Composite Analog Vertical
Measurement Accuracy
(Option CPS)
Use 100% white a
nd cursors to m easure gain.
1. Press FACTORY on the waveform rasterizer.
2. Press CONFIG, select Graticules, and set Cmpst Waveform Graticule Units to
mV.
3. Connect the precision video generator to one of the Composite A input
connectors and terminate the other connector with the precision terminator.
4. Set the Precision generator for a 100% Flat Field.
5. Press the CMPST A, CURSOR and FULL buttons.
6. Adjust the cursors to be near the top and zero portions of the waveform.
7. Press the 5X gain button. Adjust the lower cursor to be right on the backporch
of the waveform.
8. Press 1X, and adjust the vertical position to locate the top of the waveform at
the 0 mV graticule. The second cursor should also be near the zero graticule.
9. Press 5X and adjust the upper cursor to be centered on the top of the waveform.
10. Curso
r delta displays the magnitude of the waveform. It should be within 1%
of nominal 714.86 mV. Record the amplitude in the test record.
11. Perfo
rm the following steps if the Amplitude is outside the specification:
a. Press CONFIG, select Utilities, and then select Calibration and follow the
on-s
creen instructions to adjust the gain.
b. Follow the instructions at the bottom of the screen to Save and Exit
Cal
ibration mode.
c. Afterwards, repeat steps 1-10 above for Analog Vertical Gain Accuracy
an
d record the new value in the test record.
108 Waveform Rasterizers Specifications and Performance Verification
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