Difference between AVG and AVGX functions in PSpice Probe Window

When the average power is to be calculated throughout the complete time period of the waveform t, you may use the AVG function AVG(W(t)).

For the moving average of a signal, you may use the function AVGX(W(t), T).

Here, up to time T, running the AVGX function will be the same as running the AVG function. After time T, the AVGX function would give the average value evaluated over the data points falling in the time period T.

For example, imagine that up to T seconds, there are 10 data points in the waveform. Therefore, up to 10 data points, AVGX will be the same as AVG. For the 11^th data point, the AVGX function will give the average evaluated over (11-1) =10 data points. Similarly, for the 12^th data point, the evaluation will be done over (12-2) data points, which is again equal to 10 data points.

In the following example, T is 10ms. Only after 10ms, AVGX is different from AVG.

Team DesignTech

Cadence Design Systems