By default, the Fetch Measurement functions use the entire acquired waveform for the analysis. However, all the fetching attributes apply when determining what data is used for the measurement. In addition to the normal fetch attributes such as Fetch Relative To and Fetch Offset, the Fetch Meas Num Samples attribute allows you to specify the number of samples fetched for performing the measurement. By default, this attribute is –1, which fetches the actual record length. This attribute is the same as the numSamples parameter in the other Fetch functions.