Waveform analysis
R&S
®
RTO6
269
User Manual 1801.6687.02 ─ 05
e) Insert a comma using the "," key.
f) Insert the "b" value, i.e. the scaling offset, using the number keys.
g) Insert the closing bracket using the ")" key.
The resulting expression could be, for example:
rescale(Ch1Wfm1,3,4)
7.3.5
Filters
The R&S
RTO6 provides several ways to filter the input signal:
●
Lowpass filter by selecting a bandwidth limit in the acquisition path (vertical chan-
nel settings)
See
●
Digital lowpass filter
See
Chapter 5.5.5, "Digital filter setup"
●
FIR filter to create a filtered math waveform (lowpass, highpass, bandpass)
You can set up a FIR-filtered math waveform in the basic math editor, or in the
advanced editor. Both ways are described below in this chapter.
7.3.5.1
FIR filter in the math setup
Access: "Math" > "Setup" tab > "Filter" tab.
The finite impulse response filter is a filter to create filtered waveforms with lowpass,
highpass, or bandpass. The filter requires additional settings.
●
"Type": defines whether the FIR filter is a highpass, lowpass, or bandpass/band-
stop (= "User defined") filter.
●
"Cut-Off": sets the limit frequency for the highpass or lowpass FIR filter.
●
"Characteristics": relevant for lowpass filter. Defines whether it has a Gaussian or a
rectangular shape. The highpass is always Gaussian.
●
"Select filter file": relevant for bandpass/bandstop filter. Opens a file dialog to select
the file with the filter coefficients.
Mathematics
