SDS5000XSeries Digital Oscilloscope Service Manual
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4.
Set the oscilloscope Volts/Div to 100mV/div, trigger source to
selected channel, trigger slope to positive and coupling mode to DC.
5.
Set the trigger level to 300mV.
6.
Press Measurebutton on the front panel of the oscilloscope to display
Level@xmeasurement.
7.
Record the value of Level@x, calculate the level error(error = 300mV -
Level@x).
8.
Check if the trigger level error is in the limited range above.
9.
Set the trigger level to 0 mV and -300mV,repeat step 5 to step8.
10.
Set trigger slope to negative, repeat steps step5 to step9.
11.
Disconnect the test connection.
12.
Check the other analog channels in the same way as steps 1 to 11.
5.7
To Verify Ext Trigger Level
This test checks the trigger level accuracy of the external trigger channel.
In this test, the impedance of both the 9500B and the oscilloscope should
be set to 1 MΩ.
Table 5
EXT Trigger Level Error Limit
Trigger
Channel
Volt/div
Trigger Level Error Limited Range
EXT
150 mV
Abs(Error) < 45mV
