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specifying the default span and ampl in filter and sfilter

Question asked by mlabro on Feb 17, 2004
Usually for lowpass and highpass, default span is ok.
For bandpass, it is too narrow. We'd like to see zeroes of elliptic bandpass
and Amin... We don't need to zoom the 0.177 dB ripple and RL. We are confident in Filter computation according to input parameters.

When we want to increase the span, we must create a new graph, a new linear analysis... If we try to do that in filter.response, these settings will be overwritten by next filter computation if a parameter is modified.

Isn't it possible to add a tab in filter and sfilter in which we define start and stop frequencies which will be used for all computations ?

In the same time, it would be convenient in filter and sfilter to add tab to define default min and max levels for S21 and S11. For instance, I'd like that all my filters responses use separate axes for S21 and S11 and 8 grid lines, 10 dB per division for S21 (0 to -80dB) and 8 grid lines , 5 dB by division for S11 (0 to -40 dB) as on my network analyzer.

Marc  

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