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Appendix C: Algorithms
TVS600 & TVS600A Command Reference
C–25
Figure C–11: Compare this result with Figure C–9 with the same number of points
but a rectangular window
The waveform analyzer filter is specified in a manner which may be unfamiliar
to those used to working with analog filters. One difference is that cutoff and
start/stop frequencies are specified as the –6 dB point, not the –3 dB point.
Figure C–12 shows waveform analyzer specifications for a lowpass filter.
Figure C–12: Filter specifications for a lowpass filter
The cutoff frequency of the filter is specified in Hertz with the LPAS command.
As an example, to set a lowpass cutoff frequency of 20 MHz, use the command:
CALC1:FILT:FREQ:LPAS 20E6
LPAS specifies a lowpass filter and 20E6 sets the cutoff frequency (at –6 dB).
Defining Filter
Specifications