Probe Compensation
TDS 620A, 640A, & 644A User Manual
3Ć111
4. If you need to change the input impedance, press Coupling (main). Then
toggle the side menu selection
W
to get the correct impedance.
5. Press SHIFT ACQUIRE MENU ➞ Mode (main) ➞ Hi Res (side).
6. Adjust the probe until you see a perfectly flat top square wave on the
display. Figure 3-58 shows where the adjustment is located.
Figure 3-58: P6139A Probe Adjustment
See
Probe Accessories
, on page 3-97.
See
Probe Selection
, on page 3-112.
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