Keysight 9000 Series Service Manual page 25

Chapter 3: Testing Performance
5 Change the vertical scale of channel 1 to 10 mV/div, press [Clear Display], wait for the #Avgs value
(top left corner of screen) to return to 256 and then record the scope V avg reading in the V
column (Offset Accuracy Test tables - both the 50 Ω table and 1 MΩ table) in the Performance Test
Record section at the end of this chapter.
6 Repeat step 5 for the remaining vertical scale settings for channel 1 in the Offset Accuracy Test tables
in the Performance Test Record section.
7 Press [Default Setup], then turn off channel 1 and turn channel 2 display on.
8 Configure the scope to measure V avg on Channel 2 as follows:
a Pull down the Setup menu and select Acquisition. When the Acquisition Setup window appears,
enable averaging and set the # of averages to 256.
b Change the vertical scale of channel 2 to 5 mV/div.
c Click the V avg measurement icon on the left side of the screen.
d When the Enter Measurement Info window appears, ensure that the Vavg function is set up as
follows and then click OK:
Source = Channel 2
Measurement area = Entire Display
9 Press [Clear Display] on the scope, wait for the #Avgs value to return to 256, and then record the scope's
mean V avg reading in the V
MΩ table) in the Performance Test Record section at the end of this chapter.
10 Repeat step 9 for the remaining vertical scale settings for channel 2 in the Offset Accuracy Test table
of the Performance Test Record.
11 Repeat steps 7 through 10 for channels 3 and 4.
12 Ensure that each V
zero-error
Test table.
column (Offset Accuracy Test tables - both the 50 Ω table and 1
zero-error
is less than the corresponding V
Offset Accuracy Test
Limit entry in the Offset Accuracy
zero-error
zero-error
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