Video and General Performance Verification Procedures
9. Press and hold t
he GAIN button, select Gain Settings, and then select x5.
10. Press the GAIN button to close the menu.
11. Use the cursors to measure the tilt in the waveform, excluding the first and
last 5 µs of t he bar.
12. Record the value in the test record.
Composite Analog Input
DC Offset Restore Off
(Option CPS)
Measure the displayed offset when the in put is not driven and DC Restore is off.
1. Set the waveform monitor to the factory presets. (See page 60, Restore the
Factory Presets.)
2. Apply a n NTSC signal from the AVG1 output to the CMPST A input of the
waveform monitor. Terminate the other CMPST A input with a precision
termination.
3. Terminate one side of the Composite B input with a precision termination.
4. Switch DC Restore off:
a. Press the CONFIG button.
b. Select Composite Input, DC Restore, and then select Off.
5. Press the Input C button to select the Composite A input
6. Press the FULL button to make the WFM tile the full screen display.
7. Press the Input D button to select the Composite B input.
8. Press and hold the GAIN button, select Gain Settings, and then select x5.
9. Press the GAIN button to close the menu.
10. Press the C URSORS buttontoturnonthecursorcontrols.
11. Set the cursor to the center of the flat-line waveform. Note the waveform
offset indicated by the cursor readout.
12. Connect the NTSC signal from the AVG1 output to the Composite B input.
13. Press the Input C button to select the Composite A input.
14. Set the cursor to the center of the flat-line waveform. Note the waveform
offset indicated by the cursor readout.
15. Record the larger of the two waveform offset values in the test record.
Adjust. If the Offset is outside the specification,
press the CONFIG button, select
Calibration, and then press the SEL button. Use the down arrow to navigate
to Composite and follow the on-screen instructions to automatically adjust the
offset. Follow the instructions at the bottom of the screen to Save and Exit
calibration mode. Afterwards, repeat the above test for and record the new value
in the test record.
114 Waveform Monitors Specifications and Performance Verification
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