
Chapter 3: Testing Performance
To test delta time measurement accuracy
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To test delta time measurement accuracy
Description
DTMA (delta time measurement accuracy) refers to the accuracy of time delay measurements
made between two edges of a sine wave acquired on a single scope channel. DTMA depends
heavily on whether the waveform is averaged, and is expressed as both an absolute error (peak)
and a standard deviation of multiple measurements (rms).
Specifications
The DTMA specification is shown below. The periods measured by the oscilloscope must fall
within the expected value of the period ± the value shown in the table. Limits are shown in the
Performance Test Record beginning on page 64.
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