HP 8559A Operation And Service Manual page 199

5-21. BANDWIDTH FILTER ADJUSTMENTS (SERIAL PREFIX 1909A) (Cont'd)
23. Carefully center signal on CRT in 30 kHz RESOLUTION BW; then switch RESOLUTION BW to 100
kHz. Note where signal intersects the center vertical graticule line.
24. Adjust A13C45 LC CTR for maximum signal amplitude where the signal intersects the center vertical
graticule line.
25. Switch RESOLUTION BW to 30 kHz and center signal; then switch to 100 kHz. Note where signal
intersects the center vertical graticule line.
26. Adjust A13C23 LC CTR for maximum signal amplitude where the signal intersects the center vertical
graticule line.
27. Switch RESOLUTION BW to 30 kHz and center signal; then switch to 100 kHz. Note where signal
intersects the center vertical graticule line.
28. Adjust A1 lC45 LC CTR for maximum signal where the signal intersects the center vertical graticule line.
29. Switch RESOLUTION BW to 30 kHz and center signal; then switch to 100 kHz. Note where signal
intersects the center vertical graticule line.
30. Adjust AllC23 LC CTR for maximum signal amplitude where the signal intersects the center vertical
graticule line.
width settings.
Bandwidth Amplitude
32. Set Amplitude Scale to 1 dB/DIV and SWEEP TIMWDIV to AUTO.
33. Set RESOLUTION BW to 3 MHz and FREQ SPAN/DIV to 50 kHz.
34. Adjust fine TUNING and REF LEVEL FINE for a centered signal at 7 divisions.
35. Set RESOLUTION BW to 100 kHz and center signal with fine TUNING control. Adjust A13R26 LC and
A1 1R26 LC equally to obtain a signal amplitude of 7 divisions.
36. Set RESOLUTION BW to 1 kHz and FREQ SPAN/DIV to 10 kHz. Center signal with fine TUNING
control. Adjust A1 1R31 XTL and A13R31 XTL equally for a signal amplitude of 7 divisions.
Each potentiometer should be adjusted to accomplish half the necessary
increase in signal amplitude.
ADJUSTMENTS
NOTE