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SDS5000XSeries Digital Oscilloscope Service Manual
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5.1
To Verify DC Gain Accuracy
DC Gain Accuracy Slope = LINEST(V
error1
:V
error5
, V
Setting1
:V
Setting5
)
Note
:“V
Setting
” represents
the DC voltage output level setting.
“V
error
”
represents the difference between the output setting and
the measurement.
This test verifies non-interleaved mode DC Gain Accuracy of all channels.
Steps:
1.
Set the 9500B output to on.
2.
Connect all channels of the oscilloscope to the 9500B as shown
3.
Set Volts/Div of the oscilloscope to 1 mV/div. Press the Measure
button on the front panel of the oscilloscope to display Mean
measurement.
4.
Set DC voltage output level of the 9500B according to
, and
record the mean value of the oscilloscope as Vmean.
5.
Calculate Verror(Verror=VSetting
-
Vmean),and set the next output
level as step 4.
6.
Make a linear regression with these 5 data points:
VSetting1~VSetting5, Verror1~Verror5. Check if the slope falls within
the range shown in
7.
Set the oscilloscope Volts/Div to the other settings in
, and