CF-5200 Frequently Asked Questions

The number of settings refers to the data obtained from frequency analysis treated as a single data point, and it indicates the number of data points to be averaged (i.e., the number of analyses).

Time settings mean repeating the average number of times until reaching the desired average time.

One frequency analysis means that the initial setting is a data length (number of samples) of 2048, and from this data, one FFT (frequency analysis) is performed.
Behind the calculations, the data is continuously being sampled.
Once the FFT calculation is complete, the next FFT is executed using the data from 2048 samples back from that point. Therefore, it is in a state of using part of the previous data, which is called overlap processing.
The amount of overlap varies with the frequency range, so in the case of time averaging, it is unclear how many averaging times there will be until it is measured once.

Chapter of the relevant instruction manual

5.1.3. (3) Cumulative Average
3.12 Setting of Overlap Amount