User manual

Waveform Analysis

R&S

Scope Rider RTH

89User Manual 1326.1578.02 ─ 04

3.5.2.2 Waveform Data Files

The waveform data files are indicated by *Wfm.* in the file name. They contain the

actual waveform data, the Y-values of the samples. Mostly, the Y-values are voltages:

Y0; Y1; Y2; Y3; ...

Before and after the waveform data, the instrument writes some presettling and post-

settling samples. The overall number of values in the data file is:

ValuesNumber = PreSettlingSamples + HorizontalTraceLength + PostSettlingSamples

For envelope waveforms, the number of values in the file doubles. Two Y-values for

each sample are written, one for the upper and one for the lower envelope:

Ymin0; Ymax0; Ymin1; Ymax1; Ymin2; Ymax2; Ymin3; Ymax3;...

In peak detect acquisition mode, the number of values depends on the decimation fac-

tor. If the decimation factor is 1, one value per sample is written. At higher decimation

factors, two values per sample are written.

In CSV files, the data values of one sample are written in one row. Envelope data, for

example, looks like this:

-0.0125490196078431 -0.0619607843137255

-0.0133333333333333 -0.0627450980392157

-0.0149019607843137 -0.0650980392156863

XML files are easy to read:

</sample>

</sample>

</sample>

3.6 XY-Diagram

XY-diagrams combine the voltage or current levels of two input signals in one diagram.

They use the level of a second signal as the x-axis, rather than a time base. This

allows you to perform phase shift measurements, for example.

1. Press the MODE key.

2. Select "XY".

XY-Diagram