Hello all,
Today I received the 1.8 Kc 8 pole filter and installed it tonight. I did the configuration with the software tool used for firmware updates as well (also performed an update as well). All went OK, but I do have a feeling something is wrong or my ears/brains work a little different from the majority (yeh yeh I know...) When XFil 2.7 is selected together with the DSP at 2.7 Kc, the audio sounds great. When decreasing the BW with the DSP to 1.8 (but keeping the centre the same), the hardware filter is switched in at 1.8 Kc DSP setting. During the decreasing process I'm loosing "information" (Ofcourse!) but my feeling says too much. When during the decreasing process I also lower the centre freq, the excessive loss of "information" is compensated. This gives me the feeling as if the filter isn't centered anymore. First I thought this might have to do something with the Offset (-0.91 for a 2.7 5 pole filter) but nothing was written on the 1.8 Kc 8 pole filter. I just tried it, but that didn't compensate the excessive loss. During a process of decreasing bandwidth while listening to an SSB signal, I would appreciate if a shift of the centre-freq of the DSP is not required Any suggestion? 73's, Evert PA2KW _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
