Performance Tests (MSO70000/C Series, DSA/DPO70000B/C Series, and DPO7000 Series)
2. Confirm input ch
annels are within limits for offset accuracy. Do the following
substeps - test Ch 1 first, skipping substep a since Ch 1 is already selected
from step 1.
a. Select an unchecked channel:
From the too
l bar, touch Measure and then Clear All to remove the
previous measurement.
Press the Ve
rtical button of the channel just confirmed to remove the
channel from the display.
Press the f
ront-panel Vertical button that corresponds to the channel
you are to confirm.
Set the ge
nerator output to 0 V.
Move the test hookup to the channel you selected.
b. Turn on the measurement Mean for the channel:
From the tool 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.
c. Set the vertical scale: Set the vertical Scale to one of the settings in the
following table that is not yet checked.
Table 3-6: Offset accuracy
Scale setting
Position setting
(Divs) Offset setting
1
Generator setting Accuracy limits
≥ 4GHzmodels
-5
+0.45 V +500 mV +495.75 mV to +504.25 mV
10 mV
5
-0.45 V -500 mV -504.25 mV to -495.75 mV
-5
+0.4 V +500 mV +494.75 mV to +505.25 mV
20 mV
5
-0.4 V -500 mV -505.25 mV to -494.75 mV
-5
+0.25 V +500 mV +491.75 mV to +508.25 mV
50 mV
5
-0.25 V -500 mV -508.25 mV to -491.75 mV
-5
+2.0 V + 2.5 V +2.474 V to +2.526 V
100 mV
5
-2.0 V -2.5 V -2.526 V to - 2.474 V
-5
+1.25 V +2.5 V +1.965 V to +2.035 V
200 mV
5
-1.25 V -2.5 V -2.035 V to -1.965 V
-5
0 V +2.5 V +2.434 V to +2.566 V
500 mV
5
0 V -2.5 V -2.566 V to -2.434 V
1
Set as precisely as the instrument’s offset resolution permits.
MSO70000/C, DSA70000B/C, DPO7000B/C, DPO7000, MSO5000, DPO5000 Series 3–57