Keysight 9000 Series Service Manual page 26

Chapter 3: Testing Performance
Offset Accuracy Test
Offset Accuracy
Test
13 Make the connections to scope channel 1 as shown below.
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
14 Set up the DMM to perform DC voltage measurements.
15 Configure the scope to measure V avg on Channel 1 as follows:
a Press [Default Setup].
b Pull down the Setup menu and select Acquisition. When the Acquisition Setup window appears,
c Change the vertical scale of channel 1 to 5 mV/div.
d Click the V avg measurement icon on the left side of the screen.
e When the Enter Measurement Info window appears, ensure that the V avg function is set up as
26
BNC (f) to dual banana
(1251-2277)
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.
enable averaging and set the # of averages to 256.
follows and then click OK:
Source = Channel 1
Measurement area = Entire Display
Channel Input on 9000 Series Oscilloscope
6614C DC Supply