Agilent Technologies Infiniium 90000 A Service Manual page 25

Offset Gain Test
Make the connections to scope channel 1 as shown below.
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Connections
Notes:
• Where it is used, it is important to connect the BNC Tee adapter directly to the scope channel input
• It also helps to reduce ground potential differences if the scope and DMM are connected to the same
• A fairly large number of averages are used in the scope measurements of this section to reduce
Set up the DMM to perform DC voltage measurements.
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Configure the scope to measure V avg on Channel 1 as follows:
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a Press Default Setup.
to minimize ground potential differences and to ensure that the DMM measures the input voltage to
the scope channel as accurately as possible. Differences in ground potential can be a significant source
of measurement error, particularly at high scope sensitivities.
AC supply circuit.
measurement noise and to reduce the measurement error due to resolution.
Chapter 3: Testing Performance
Offset Accuracy Test
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