Agilent Technologies 1141A, User'S Manual And Service Manual

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32 1141A and 1142A User’s Guide
2 Calibrating the Probe
10x Attenuator Accuracy Test
10x Attenuator Accuracy Test
NOTE
If the gain test for the probe fails, the 10x Attenuator Accuracy Test will fail or the
results will be poor. Do not continue until the probe passes the dc gain test.
1
Disconnect the probe from the test board and connect the 10x
attenuator adapter to the probe.
2 Carefully connect the input of the probe/attenuator to the test
board in the position shown in
Figure 13 .
Figure 13 Signal to + Input
3
Set the dc calibrator output 3V dc.
4
Record the V
in1
measurement from the top DVM in Figure 11 on
page 30.
5 Record the V
out1
measurement from the bottom DVM in Figure 11
on page 30.
6
Carefully connect the input of the probe/attenuator to the test
board in the position shown in
Figure 14 .
Figure 14 Signal to –Input
7
Record the V
out2
measurement from the bottom DVM in Figure 11
on page 30.
8 Calculate the 10x attenuator gain as