Tektronix TDS2022C Service Manual page 49

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual
The two attenuator settings operate identically, so verification of the attenuation
range from -1.8 V to 1.8 V also verifies the attenuation range of -45 V to 45 V.
1. Set up the oscilloscope as shown in the following table:
Push menu button
Default Setup
Channels 1, 2, 3, 4
Channels 1, 2, 3, 4
Trig Menu
Acquire
Measure
1
The test operates without a trigger. To maintain uniformity and to avoid false triggering on noise, the Ext trigger is
the recommended source.
2. Make a spreadsheet approximately as shown in the example in Appendix A.
You only need to enter the values for column A and the equations. The values
in columns B, C, D, E, F, and G are examples of the measured or calculated
values.
The PDF version of the service manual (which you can download from
www.tektronix.com/manuals), includes an empty spreadsheet for your
convenience. To access and save the test spreadsheet, see the instructions
in Appendix A: Example of a Vertical Position Accuracy Test Spreadsheet
on page A-1.
3. Connect the oscilloscope, power supply, and voltmeter as shown in the
following figure:
Select menu option
—
Probe
Volts/Div
Source
Mode
Sample
Source
Type
Performance Verification
Select setting
—
1X
50 mV/div
Ext 1
Auto
—
Channel under test
Mean
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