Chapter 3: Testing Performance
Time Base Accuracy Test
3–27
d In some cases, the time base clock will be too close in frequency to the input signal used
in this test. If this is the case, a waveform like the one shown below will be displayed.
If this case, it will be impossible to capture a full cycle of the aliased waveform. If this
occurs with the timebase set to 200 ms/div or higher, and if the frequency accuracy of the
source is 0.4 ppm or better, then the scope under test passes this test.
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