Adjustment Procedures:Analog Section
5-6 WFM90D and WFM91D Service Manual
6. Select CAL MENU, and then select SAVE.
7. Set the function generatorfrequency to 100 kHz.
8. Select 2H SWEEP from the Operating menu.
9. Select 2H SWEEP from the Calibrationmenu, and then select CAL.
10. Adjust the arrowbuttons for one cycle per major division.
11. Select CAL MENU, and then select SAVE.
12. Replace the signal on the VIDEO IN connectorwith the output from the
leveled sine wavegenerator. Use the 50 Ω-to-75 Ωminimum-loss attenuator
and precision(1%) 50 Ωcable if the generator specifies a 50 Ωoutput.
13. Set the sine wave generatorfor a 1 MHz output.
14. Select MAG ON from the Operating menu.
15. Select MAG GAIN from the Calibration menu, andthen select CAL.
16. Adjust the arrowbuttons 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 connectorwith a 75% color bar signal
from the televisionsignal generator, using a 75 Ωin-line termination.
20. Select 2F SWEEP from the Operating menu.
21. Select 2F SWEEP from the Calibrationmenu, and then select CAL.
22. Adjust the arrowbuttons 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 selectCAL .
26. Select POS, and then use the arrowbuttons to position the falling edge of
sync to the center graticulemark.
27. Select MAG ON, and then select MAG REG.
28. Use the arrowbuttons to return the falling edge of sync to the center
graticulemark.
29. Select MAG OFF.
30. Select CAL MENU, and then select SAVE.