Agilent Technologies 1145A, User'S And Service Manual, Page: 17 / 24

17
1145A 2-Channel Active Probe
DC Gain Accuracy
1
Using the DMM, set the output of the power supply to 1.0 V ±0.1%.
Power supply voltage ___________.
2
Connect the equipment as shown below.
Before you connect the power supply to the probe, you will measure the probes
output offset voltage in step 3.
3
Using the DMM, measure the probe’s dc output offset voltage on
channel 1.
Probe output offset voltage ___________.
Typically the offset will be much less than 1 mV.
4
Connect the probe’s channel 1 input connector to the power supply.
5
Using the DMM, measure the output of the probe.
Probe output voltage ___________.
6
Calculate the dc gain.
The dc gain should be between 0.097 and 0.103 (0.10 ±3.0%)
7
Repeat steps 1 through 6 for channel 2.
dc Gain
Probe output voltage - Probe output offset voltage
Power supply voltage
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