Tektronix WFM90D, Quick Start Manual

Page: 90 / 170

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 terminator.
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 .