Waveform analysis
R&S
®
RTO6
266User Manual 1801.6687.02 ─ 05
Mathematic background for auto correlation:
Equation 7-3: Biased auto correlation
Equation 7-4: Unbiased auto correlation
The R&S RT
O6 uses only the real part of the signal.
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 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 270
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:
MovingA
verage(Ch1Wfm1,1000)
Averages 1000 subsequent samples of the channel 1
waveform
Mathematics
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