Waveform analysis
R&S
®
RTO6
271User Manual 1801.6687.02 ─ 05
FIR(tpye,source,limit,shape)
●
T
ype is
lowpass or highpass
●
Source is the input channel of the signal.
●
Limit is the cut-off frequency. Consider the range of possible values, see "Cut-off
frequency for lowpass FIR filter" on page 270.
●
Shape is gaussian or rectangle for the lowpass filter, and gaussian for the high-
pass.
► For example, to set a rectangle lowpass filter on channel 1 with 10 MHz cut-off fre-
quency, enter:
FIR(lowpass,Ch1,1e+07,rectangle)
► For example, to set a Gaussian highpass filter on channel 2 with 3 GHz cut-off fre-
quency, enter:
FIR(highpass,Ch2,3e+09,gaussian)
Bandpass and bandstop FIR filter
The syntax for the bandpass filter is:
FIR(userdef,source,path)
●
Source is the input channel of the signal.
●
Path is a string containing the path and filename of the filter file. The file contains
the comma-separated filter coefficients.
► For example, to set a bandpass on channel 1 with filter coefficients saved in the
bandpass.csv file, enter:
FIR(userdef,Ch1,"C:\Users\Public\Documents\Rohde-Schwarz\RTx\bandpass.csv")
7.3.6 Math scale settings
Access: [Math] > "Scale" tab.
In this tab, you can find functions to set the vertical parameters of the math waveform.
For FFT scale settings, see Chapter 9.1.4, "FFT scale settings", on page 387.
Mathematics
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