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Calibration Tests and Adjustment
dc Gain Accuracy
100x Attenuator Accuracy Test
NOTE If the gain test for the probe fails, it will be reflected in the test for the 100x attenuator
adapter. Do not continue until the probe passes the gain test.
1 Disconnect the probe/attenuator from the test board. Remove the 10x
attenuator adapter from the probe and connect the 100x attenuator adapter.
2 Carefully connect the input of the probe/attenuator to the test board in the
position shown in the figure below (signal to + input).
Figure 2-6
Signal to + input
CAUTION Avoid excessive power dissipation in the termination on the test board. Keep the voltage
input at or below ±7 Vdc.
3 Set the dc source output to 7 Vdc.
4 Record the V
in1
measurement from the top DVM in figure 2-2.
5 Record the V
out1
measurement from the bottom DVM in figure 2-2