[Hamlib-developer] Bandwidths and Filters

[Stefan J. <DK...@da...>]

Hi dear hamlib experts,

Sorry for my maybe stupid question. But I have to say that I am not familiar with the internals ofhamlib, I am only using it to develop some rig control software. :-)

When I look at the output of the rigctl —dump-caps option for my Elecraft KX2 transceiver, I can see that hamlib seems to support setting filters and bandwidths. Yes, I know that my KX2 has some predefined filters, for example the audio peek filter APF. And I can apply change the center frequency and bandwidth of the IF passband. That’s fine.

But what about the bandwidth? I suppose that the bandwidth should affect the HF signal when transmitting and should also affect demodulation. So for CW, I find bandwidths of 600Hz (normal), 300Hz (narrow) and 2400Hz (wide). But I never found a way to control the bandwidth from the keys and knobs of the KX2 itself.

Does anybody know what hamlib does to set this? Or how I could figure out? I guess without knowing anything about the structure of hamlib backends I might get stuck without any hints where to get started.



Vy 73 de Stefan, DK7STJ

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Stefan Jansen    ***    E-Mail: DK...@da...