SDS2000 X HD Ser vice Manual
41
5.6
To Verify Trigger Level
This test checks the trigger level accuracy of the analog channels. In this test, the impedance of both
the 9500B and the oscilloscope should be set to 50 Ω.
Trigger Level Accuracy: |Error| ≤ 20 mV
Steps:
1.
Connect the selected channel of the oscilloscope to the 9500B as shown in Figure 7.
2.
Set the
impedance of the 9500B to 50 Ω, frequency to 2 kHz, amplitude to 800 mV, and
waveform to sine.
3.
Set the timebase of the oscilloscope to 50 us/div.
4.
Set the impedance of the selected channel, vertical scale to 100 mV/div, trigger source to the
selected channel, trigger slope to positive, and coupling mode to DC.
5.
Set the trigger level to 300 mV.
6.
Selected the Measure menu of the oscilloscope to display
“ Level@x ” measurement.
7.
Record the value of
“Level@x ”, calculate the level error ( error = 300 mV - Level@x ).
8.
Check if the trigger level error is in the limited range above.
9.
Set the trigger level to 0 mV and -300 mV, repeat step 6 to step 8 in turn.
10.
Set trigger slope to negative, repeat steps step 5 to step 9.
11.
Disconnect the test connection.
12.
Check the other analog channels in the same way as steps 1 to 11.
