2. Confirm input channels are within limits for DC accuracy at maximum offset,
position, and termination voltage: Do the following substeps - test Ch 1 first,
skipping substep 2.a of this step since Ch 1 is already selected from step 1.
a. Select an unchecked channel:
■
From the button bar, touch Measure and then Clear All to remove
the previous measurement.
■
Press the Vertical button of the channel just confirmed to remove the
channel from the display.
■
Press the front-panel Vertical button that corresponds to the channel
you are to confirm.
■
Set the generator output to 0 V.
■
Move the test hookup to the channel you selected.
b. Turn on the measurement Mean for the channel:
■
From the button bar, touch Measure and select the Ampl tab, More,
and then touch Mean to measure the mean of the current channel.
■
Press the X (Close) button.
NOTE. If any of the voltages supplied by your generator are not
calibrated, verify those generator voltages using a digital multimeter,
item 27.
c. Set the vertical scale: Set the vertical Scale to one of the settings listed in
the following table that is not yet checked, starting with the first setting
listed.
Table 6: DC voltage measurement accuracy
Scale setting Termination setting Offset setting
3
Generator setting Accuracy limits
6.25 mV +3.5 V +3.4 V 3.419 V 3.4012 V to 3.4363 V
+3.5 V +2.4 V 2.419 V 2.4032 V to 2.4343 V
+1.5 V +2.5 V 2.509 V 2.49345 V to 2.52456 V
+1.5 V +1.5 V 1.509 V 1.49945 V to 1.51856
+1.5 V +0.5 V 509 mV 501.45 mV to 516.56 mV
0 V 0 V 18.5 mV 14.76 mV to 22.25 mV
0 V –1.0 V -991 mV -1.00056 V to -981.45 mV
0 V +1.0 V 1.009 V 999.45 mV to 1.01856 V
-3.5 V -3.4 V -3.419 V -3.4363 V to -3.4012 V
-3.5 V -2.4 V -2.419 V -2.4343 V to -2.4032 V
3
Set as precisely as the instrument's offset resolution permits.
Performance verification (MSO/DPO70000C, MSO/DPO70000DX, and DPO7000C series)
178 MSO70000C/DX, DPO70000C/DX, DPO7000C, MSO5000/B, DPO5000/B Series
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