SLWU087E november 2013 – june 2023
The Time Domain option, when selected, displays the ADC captured data as digital codes in the time domain. The statistics of the codes reported on the left side of the GUI are minimum value (Min), maximum value (Max), Standard deviation (St. Dev), Mean, Median, RMS, Peak-to-Peak and PAR.
M1, M2, Delta – Displays the code value of the location of markers M1 and M2. These markers can be moved around on the display with the mouse. The Delta parameter displays the code value difference between M2 and M1.
The position of the markers M1 and M2 are editable in the above table. For example, to set a position for Marker M1, just click on the Units column of M1 row cell, and enter the required value to see the change in M1 Marker Position.
Furthermore, the time domain RMS value is calculated with the DC power of the signal. The Standard deviation value does not include the DC power.
The following steps explain how the HSDC Pro calculates the RMS and Standard Deviation values.
The VI calculates the standard deviation value using Equation 5.

where Ψx is the standard deviation value and n is the number of elements in X and the mean value is represented by µ.
The VI calculates rms value using Equation 6.

where Ψx is rms value and n is the number of elements in X.