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Adjustment Procedures: Analog Section
5-6
WFM90D and WFM91D Service Manual
6. Select CAL MENU, and then select SAVE.
7. Set the function generator frequency to 100 kHz.
8. Select 2H SWEEP from the Operating menu.
9. Select 2H SWEEP from the Calibration menu, and then select CAL.
10. Adjust the arrow buttons for one cycle per major division.
11. Select CAL MENU, and then select SAVE.
12. Replace the signal on the VIDEO IN connector with the output from the
leveled sine wave generator. Use the 50 Ω-to-75 Ω minimum-loss attenuator
and precision (1%) 50 Ω cable if the generator specifies a 50 Ω output.
13. Set the sine wave generator for a 1 MHz output.
14. Select MAG ON from the Operating menu.
15. Select MAG GAIN from the Calibration menu, and then select CAL.
16. Adjust the arrow buttons for one cycle per major division.
17. Select CAL MENU, and then select SAVE.
18. Select MAG OFF from the Operating menu.
19. Replace the signal on the VIDEO IN connector with a 75% color bar signal
from the television signal generator, using a 75 Ω in-line termination.
20. Select 2F SWEEP from the Operating menu.
21. Select 2F SWEEP from the Calibration menu, and then select CAL.
22. Adjust the arrow buttons for a sweep length of 12 major divisions.
23. Select CAL MENU, and then select SAVE.
24. Select 2H SWEEP from the Operating menu.
25. Select MAG REG from the Calibration menu, and then select CAL.
26. Select POS, and then use the arrow buttons to position the falling edge of
sync to the center graticule mark.
27. Select MAG ON, and then select MAG REG.
28. Use the arrow buttons to return the falling edge of sync to the center
graticule mark.
29. Select MAG OFF.
30. Select CAL MENU, and then select SAVE.