Calibration Adjustment and Verification
Calibration Verification 3
3-45
Verifying AC-DC Difference for Regions I and III (220 mV through 1000 V Range)
Calculate the ac-dc difference error by comparing the ac-dc difference of the
source as measured by the Product and the 792A. To do this, use the instrument
setup and technique as described under “AC Calibration”.
Proceed as follows to verify ac-dc difference in regions I and III:
1. Use the setup in Figure 3-8 and the procedure under “AC Calibration”.
2. For each point, take ac and dc measurements and enter them in copies of
worksheet Figure 3-14 or Figure 3-15. Use Figure 3-14 and characterized
dc settings for the 700 mV, 220 mV and 70 mV ranges as follows: Set the
5730A to nominal, then use the knob to adjust for the error display you
recorded in Table 3-2. The procedure to obtain those settings is
described under “Characterizing the DC Source” at the beginning of the
calibration instructions in this chapter. Use Figure 3-16 and nominal dc
outputs for ranges other than those listed earlier in this step.
3. Calculate the ac-dc difference error as shown in Figure 3-15 or 3-16.
Enter the result in the Table 3-14.
Verifying Absolute AC Error for Region IV (70 mV through 700 mV Range)
You calculate absolute ac error by measuring the absolute ac of the source
signal and comparing it to the ac measured by the Product.
Proceed as follows to verify absolute ac for Region IV:
1. Use the setup in Figure 3-8 and the procedure under “AC Calibration”.
2. For each point, take the ac and dc measurements and enter them in
Figure 3-16. Use characterized dc settings as follows: Set the 5730A to
nominal, then use the knob to adjust for the error display recorded in
Table 3-2.
3. Calculate the absolute ac error as shown in Figure 3-16. Enter the result
in Table 3-14.
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