Waveform analysis
R&S
®
RTE
307User Manual 1326.1032.02 ─ 20
7.3.4.8 Math functions: filter and power
Table 7-10: Filter and power (More keys)
Icon Description Usage, comment, FormulaEditor expression
Electric power Electric power is calculated from voltage, based on mea-
surement impedance
(see Measurement impedance)
elecpower(x) = U
2
/R
Finite impulse response (FIR)
filter
FIR(tpye,source,limit,shape) or FIR(userdef,source,path)
See Chapter 7.3.5.2, "FIR filter in the formula editor",
on page 311
Type of FIR filter highpass or lowpass, see FIR filter
Characteristics of FIR filter gaussian or rectangle, see FIR filter
Moving average Calculates a mean value of several adjacent sample
points. The result is a smoothed waveform. The moving
average uses the full data and can be used for non-peri-
odic signals. It works like a lowpass filter and increases
the vertical resolution at the expense of bandwidth reduc-
tion.
MovingAverage(x,y)
with: x = source (channels only), y = number of samples
to be averaged
Example:
MovingAverage(Ch1Wfm1,1000)
Averages 1000 subsequent samples of the channel 1
waveform
7.3.4.9 Transfer functions of a step-like signal
The R&S RTE provides two functions to calculate the transfer function of a system out
of its step response. These functions are not supported by the formula editor, but you
can enter them directly in the "Advanced" tab in the "Math Setup" dialog box. To enter
the formula, you need a keyboard (onscreen keyboard or a connected usual one).
Mathematics
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