Magnescale SR138-025R Instruction Manual page 79

3 Set the TIME/DIV switch of the oscilloscope to the X-Y
mode.
4 Set the deviation sensitivity (VOLTS/DIV) of CH1 and CH2
of the oscilloscope to 0.2 V/DIV.
5 Set the input coupling switches of CH1 and CH2 of the
oscilloscope to GND and adjust the oscilloscope to locate
the signal at the bottom left of the screen. (Fig. 4-3)
Fig. 4-3
6 Set the input coupling switches of CH1 and CH2 of the
oscilloscope to DC.
7 Turn on the interface unit.
8 SIN/COS signal DC level check and adjustment
Move the scale part or slider part, and check that the
Lissajous' curve center (Fig. 4-4) is within the specified
value over the entire length.
If the center is not within the specified value, adjust the DC
level so that the Lissajous' curve center is set at the specified
value.
Specified value of Lissajous' curve center = 0.9 V ±0.02 V
DC level adjustment trimmer RV1 (SIN) : a direction
a
Fig. 4-4
RV3 (COS) : b direction
b
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