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Calculating the Sample Rate
1. The following steps will investigate the relationship between the oscilloscope’s horizontal scale
factor, record length and sample rate.
a. Set the horizontal scale to 500 µs/div.
b. The displayed time window is (500 µs/div) x (10 divisions) = 5 ms.
c. The record length of the TBS1000 Series is always 2500 points.
d. The sample rate at this horizontal scale setting is 2500 points / 5 ms = 500 kS/s.
Key Points to Remember
1. The sample rate of the oscilloscope is determined by the displayed time window (and therefore, the
horizontal scale factor) and the selected record length.
windowtime
lengthrecord
ratesample =