Calibration Adjustment
5.8 Probe Calibration
5
5.8 Probe Calibration
To meet full user specifications, you need to adjust the supplied red and gray VPS200
voltage probes for optimal response.
To adjust the VPS200 probes, do the following:
1. Connect the red probe from the red Input A BNC to the banana jacks. See figure 5-9
ST8416.WMF
ST7991.WMF
Figure 5-9. 10:1 Probe Calibration Connection Figure 5-10. 10:1 Probe Calibration
2. Press , and then to open the
Probe on A
menu
3. Select Probe Type:
Voltage | Attenuation: 10:1 , Probe Cal...
4. Press
to start the probe calibration. A square wave appears on the screen. See
Figure 5-10 (the lower half of the screen is covered with operating instructions).
5. Adjust the trimmer screw in the probe housing until a pure square wave is displayed.
6. Press to continue with automatic dc calibration.
The test tool automatically calibrates itself to the probe. A message indicates that he
dc calibration has been completed successfully.
7. Repeat the procedure for the gray VPS200 probe, connected from the gray Input B
BNC to the banana jacks.
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