Performance Veri
fi
cation
Check DC Balance
This test checks the DC balance. You do not need to connect any equipment (other
than a 50
Ω
terminator) to the oscilloscope to perform this check.
1.
Attach a 50
Ω
terminator to the oscilloscope channel 1 input.
2.
Push the front-panel
Default Setup
button.
3.
Set the input impedance to 50
Ω
as follows:
a.
Push the channel 1 button.
b.
Set the
Termination
(input impedance) to
50
Ω
.
4.
Set the bandwidth to 20 MHz:
a.
Push the lower-bezel
Bandwidth
button.
b.
Push the side-bezel button for
20 MHz
.
5.
Set the Horizontal
Scale
to
1 ms
per division.
6.
Set the Acquisition mode to Average as follows:
a.
Push the front-panel
Acquire
button.
b.
Push the
Average
side bezel button.
c.
Ensure that the number of averages is
16
.
7.
Set the trigger source to AC line as follows:
a.
Push the Trigger
Menu
front-panel button.
b.
Select the
AC Line
trigger source with the
Multipurpose a
knob.
8.
Set the Vertical
Scale
to
1 mV
per division.
9.
Select the mean measurement (if not already selected) as follows:
a.
Push the front-panel Wave Inspector
Measure
button.
b.
Push the
Add Measurement
lower bezel button.
c.
Use the
Multipurpose b
knob to select the
Mean
measurement.
d.
Push the
OK Add Measurement
side-bezel button.
e.
View the
Mean
measurement value in the display.
10.
Enter the mean value as the test result in the test record.
11.
Repeat steps 8 through 10 for each vertical scale setting in the test record.
12.
Push the channel 1 button and then repeat steps 4 thorough 11 for each
bandwidth setting.
MSO4000B and DPO4000B Series Speci
fi
cations and Performance Veri
fi
cation
57
Содержание DPO4000B Series
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