4〉 Electrical Adjustment - Sony GB-A Series Instruction Manual

〈4〉 Electrical adjustment
1 Insert the preamplifier into the counter and turn on the
counter.
2 Connect an oscilloscope probe to the PM terminal on
the preamplifier board and an earth clip to the
connector receptacle screw. (Fig. 4-5)
3 Set the oscilloscope to 0.5 V/div, 5 ms/div and reset the
(TIME/div) while moving the scale at a speed of 1 to 10
m/min so that the waveform shown in Fig. 4-6 can be
observed.
* Adjust the PM waveform ripple (c/d) over the entire
effective length of the scale.
Adjust so that (c/d)≦0.04 (SR127 series), (c/d)≦0.05
(SR128 series). Proceed to steps 1 to 6.
Fig. 4-5
Fig. 4-6
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