TAS 200 Series Adjustment Procedures
38
Handheld and Benchtop Instruments Basic Service
TRIGGER COUPLING AC
TRIGGER SOURCE X-Y
2. Use a 50 W coaxial cable to connect the square wave generator to the CH 1
input. Set up the generator for a 1 kHz 50 mV output.
3. Adjust VR109 for exactly five divisions of horizontal deflection on the
display. See Figure 8 for the adjustment location.
Use the following procedure to adjust the X-axis DC offset.
1. Set up the oscilloscope as follows:
CH 1 VERTICAL POSITION Midrange
VERTICAL MODE CH1
CH 1 VOLTS/DIV 50 mV
CH 1 GND In
HORIZONTAL SEC/DIV 1 ms
HORIZONTAL X-Y Out
TRIGGER MODE AUTO
2. Position the trace vertically to the horizontal center graticule line.
3. Position the left edge of the trace horizontally to the first vertical graticule
line (extreme left).
4. Set the HORIZONTAL X-Y push switch to the in position.
5. Adjust VR401 to position the spot to the center vertical graticule line. See
Figure 10 for the adjustment location.
X-Axis Offset
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