My preference is to use the 700 Hz xtal filter and then narrow down the bandwidth with the DSP filters when necessary.
Doug, W6JD K2/100 #1626 -------------- Original message -------------- From: "Solosko, Robert B (Bob)" <[EMAIL PROTECTED]> > > Hello All, > > I just added the DSP processor to my K2 and adjusted both the DSP and > XTAL filters to the same center frequency using Spectrogram. The DSP and XTAL > filters work fine together, except that when using the default filter > settings, > the DSP and XTAL filters essentially duplicate each other and it's not > obvious > what the best combination of filter settings should be and how the XTAL and > DSP > filters should be used in combination, particularly for SSB. > > I found a posting from Tom Hammond from January in which he recommends > that for CW, because of the signal loss of the XTAL filters below 200Hz, use > the > DSP filters below 200 Hz. and the XTAL filters above 200 Hz. Thus, it seems > that > I should set the CW DSP filters to something like 200 Hz, 100 Hz, 50 Hz and > LOPASS, and the XTAL CW filters to something like 1.5 kHz, 1.0 kHz, 700 Hz > and > 400 Hz. Then, when I want the wider bandwidth, I'd use one of the XTAL > filters > with the DSP filter set to LOPASS, and when I want the narrower bandwidth, > I'd > use one of the DSP filters (and since the XTAL filters all would have wider > bandwidths, it wouldn't make any difference which XTAL filter is selected). > > That seems like a reasonable approach to the DSP and XTAL filter > settings and combinations on CW. (Comments?) > > However, I have no idea how to set up the DSP and XTAL filters and what > filter combinations to use for SSB. It seems to be a waste of the K2 > capabilities just to have the DSP and XTAL SSB filters essentially duplicate > each other, as their default settings seem to do. So, is there some optimum > way > to setup the DSP and XTAL filters and use them in combination for SSB that > makes > best use of the K2 capabilities? > > Thanks for any advice and suggestions that you can give me. > > > Bob Solosko > W1SRB > _______________________________________________ > Elecraft mailing list > Post to: [email protected] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
