Tektronix WFM7020 Technical Reference

Video and General Performance Verification Procedures
7. Select input an
d switch DC Restore off:
a. Press the CONFIG button.
b. Select Composite Input, DC Restore, and then select Off.
c. Press the CONFIG button to close the menu.
8. Press the CURSORS buttontoturnonthecursorcontrols.
9. Use the arrow keys to select V
olt1 or Volt2 and measure the peak-to-peak hum
with the cursors. Use the GENERAL knob to adjust them. The measurement
should be about 100 IRE. Record Pass or Fail in the test record.
10. Switch DC Restore to Fast:
a. Press the CONFIG button.
b. Select Composite Input, DC Restore, and then select Fast.
11. Press and hold the GAIN button, select GAIN Settings and then x10.Then
select VA R G a i n , press the right arrow key to highlight Enable, and use the
GENERAL knob to adjust the gain to x4.00.
12. Use the arrow keys to select Volt 1 or Volt2 and measure the peak-to-peak hum
with the cursors. Use the GENERAL knob to adjust them. The measurement
should be less than 5% of the measureme
nt in step 9 (less than ~5 IRE).
13. Record the value in the test record.
14. Press and hold the GAIN button, select Gain Settings, and then select x2.
15. Select VA R G a i n, press the right arrow key to highlight Enable, and use the
GENERAL knob to adjust the gain to x1.25.
16. Switch DC Restore to Slow:
a. Press the CONFIG
button.
b. Select Composite Input, DC Restore, and then select Slow.
17. Measure the peak-to-peak hum with the cursors. Touch the Volt1 or Volt2
touchable readout in the WFM tile and use the GENE RAL knob to adjust
them. It should be between 90% and 110% of the measurement in step 9.
18. Record the value in the test record.
Composite Analog Vertical
Measurement Accuracy
(Option CPS)
Use 100% white and cursors to measure gain.
1. Set the waveform monitor to the factory presets. (See page 60, Restore the
Factory Presets.)
2. Connect the precision video generator to one of the CMPST A input
connectors and terminate the other connector with the precision terminator.
3. Set the Precision generator for a 100% Flat Field.
116 Waveform Monitors Specifications and Performance Verification

Tektronix WFM7020 Specifications

General

Brand	Tektronix
Model	WFM7020
Category	Monitor
Language	English