Hi Dick,
Wolf's Spectrum Laboratory can be used to exactly that.
http://people.freenet.de/dl4yhf/spectra1.html
--
73 Warren K2ORS/WD2XGJ/WD2XSH/23
FN42hi
http://www.w4dex.com/wd2xgj.htm
-------------- Original message ----------------------
From: Dick Rollema <[email protected]>
> To All from PA0SE
>
> Does someone know whether a DSP filter using the sound card of the computer
> can be found on the internet , that can filter the audio output of the
> receiver with an adjustable bandwidth down to, say, 20Hz or so?
>
> I use a passive audiofilter between the receiver and the headphones with
> four tuned circuits. It has a bandwidth of about 25Hz, a centre frequency
> of 900Hz and a linear phase characteristic to avoid ringing. But perhaps a
> DSP filter could do even better.
>
> 73, Dick, PA0SE
> JO22GD
>
>
>
|
