Agilent Technologies Signal Analyzer N9030a User Manual

Page 1389

6 RLC Swept SA Measurement Front-Panel & SCPI Reference

Trace/Detector

Smoothes the trace according to the number of points specified in :TRACe:MATH:SMOoth:POINts.
There is no equivalent front panel function.

The purpose of this function is to perform a spatial video averaging, as compared to the temporal
version supplied by the video-average command [:SENSe]:AVERage:TYPE VIDeo. The functions of
TRACe:MATH:SMOoth and [:SENSe]:AVERage:TYPE VIDeo|POWer are not interchangeable.

Remote Command

Initial S/W Revision

Prior to A.02.00

Each point value is replaced with the average of the values of the selected number of points, with
half of those points located on each side of any particular point (when possible). Refer to Figure
14–1 below. This figure illustrates a 401 point trace with a smoothing number of 31. Think of the
trace points as “buckets” of data. To smooth (arbitrary) point 273, the analyzer averages buckets
258 through 288 and applies that value to point 273.

Increasing the number of points increases smoothing at the cost of decreasing resolution.

The amount of smoothing decreases at the end points. Because :TRACe:MATH:SMOoth
averages values that occur before and after the data point in time, display irregularities can be
caused at the start and stop frequencies. To avoid possible irregularities (signal distortion) at the
ends of the trace, use small values for the smooth parameter.

Remote Language Compatibility Measurement Application Reference

1389