Composite X Deflection Waveform - HP 8566B Adjustment Manual

3. Preliminary Display Adjustments (SN 3004A and Above)
3-60 Adjustments
the combined X deflection voltage applied to the CRT. Use the
oscilloscope front-panel knob to adjust waveform fl sensitivity for
approximately 8 vertical divisions.
Figure 3-27. Composite X Deflection Waveform
17. Adjust AlA2R217 HF GAIN, AlA2C204, and AlA2C209 for
minimum overshoot and minimum rise and fall times of the
composite Xdeflection waveform.
Always adjust AlA2C204 and AlA2C209 in approximately equal
amounts. Do not adjust one to its minimum value and the other to its
maximum value.
18. Use the oscilloscope Cntav) markers to measure the risetime,
falltime, and percent overshoot of the composite Xdefection
waveform. Rise and fall times should both be less than
approximately 65 ns between the 10% and 90% points on the
waveform. Overshoot should be less than 3% (approximately 0.25
divisions). See Figure 3-28.
O V E R S H O O T
Rise and I%11 Times and Overshoot Adjustment Waveform
1 2 5 . 0 0 0 ns
5 0 . 0 ns/div
Figure 3-28.
2 0 . 0
25.00 v
O V E R S H O O T