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(7) Focus gain
Push Il PAUSE bution.
Equipment setup
a
Filter
Oscilloscope
Pin) of TP-101
FEO x
Pin Q) of TP-101
©
FEL
Pin © of TP-101 0
*FEO:
Focus Error Out
FE!:
Focus Error In
Frequency
Counter
3) Adjustment
@ Set the audio oscillator output to 620 Hz, 1.0
Vp-p (+0.1 V).
@
Select oscilloscope
input in X-Y
mode
so to
observe
Lissajous waveform
(Select DC range
for both X and Y inputs).
@
Adjust VR102 so that each Lissajous waveform
symmetrizes X and Y axes.
(Adjust each input
phase 90°)
Yaxis
Y axis
X axis
14
Oscillator
Set to 620Hz,
1Vp-p
X axis
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