d. Set the vertical scale:
For the channel you are testing, set the vertical Scale to the setting listed
in the tables (starting with the lowest setting). See the preceding Channel
bandwidth table that applies to your instrument.
e. Set thetrigger coupling: From the button bar, touch Trigger and select
Coupling DC.
f. Display the test signal: Do the following subparts to first display the
reference signal and then the test signal.
■
MSO/DPO71254C and MSO/DPO72504DX: From the button bar,
touch Cursors. Touch Cursor Type H Bars.
■
From the button bar touch Measure; then select the Time tab.
■
Touch the Freq button to measure the frequency of the current
channel.
■
Select the Ampl tab. Touch the Amplitude button.
■
From the Annotation drop-down list, select None.
■
Touch the Statistics button, then touch the Mean button.
■
Touch the X (Close) button.
■
Set the generator output so the Chx Amplitude mean readout equals
the reference amplitude. See the preceding Channel Bandwidth table
that applies to your oscilloscope model. This corresponds to the
vertical scale set in substep 2.d.
■
Record the reading on the power meter.
■
Set the trigger as follows:Press the front-panel Push-Set 50% button
as necessary to trigger a stable display. At full bandwidth, you may
also want to make small, manual adjustments to the trigger level.
You can use the Trigger Level knob to do this.
NOTE. If you are using Line trigger, the test signal is not shown as a
stable display.
g. Measure the test signal:
■
MSO/DPO71254C and MSO/DPO72504DX: Set the frequency of
the generator to the test frequency in the tables that corresponds to
the vertical scale set in substep 2.d.
■
All instruments except the MSO/DPO71254C and MSO/
DPO72504DX: Set the frequency of the generator, as shown on
Performance verification (MSO/DPO70000C, MSO/DPO70000DX, and DPO7000C series)
MSO70000C/DX, DPO70000C/DX, DPO7000C, MSO5000/B, DPO5000/B Series 235
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