Al, As has been pointed out - the K3 does it a bit differently because you can control both the width and the shift. For the K3, the width remains constant (whatever you set it at), and the shift moves that entire passband higher or lower. In the K3 it is no as you describe, but for transceivers with fixed width filters (and Pre-DSP filters), the way you described it is how they work
73, Don W3FPR Al Lorona wrote: >> It depends entirely on which brand of radio you were using >> and how the manufacturer implemented IF shift and/or width. >> > > Originally, IF shift was defined as moving one IF passband within another IF > passband, making the resulting passband the intersection (not the union) of > the two passbands. > > When you do that, you effectively reduce the width *and* the center > frequency of the IF passband... it has nothing to do with manufacturers > failing to make it work correctly. > > Take two pieces of paper and cut a square in each. Hold them up to a window, > and slide one square horizontally across the other one, and note how the > width *and* center of the opening shifts left or right. This is what I mean > when I say, "IF shift". We might be talking about two different things. > > Regards, > > Al W6LX > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
