Any screen shots? - David Wilburn [EMAIL PROTECTED] K4DGW K2 S/N 5982
On Wed, 2007-12-26 at 20:18 -0700, cloud runner wrote: > The dual passband on spectrogram was most informative. It turns out my ear > had little idea what was going on. > > I have the 2.7 khz and the 500 khz (but the radio is set to 600 khz). I > think this function will act differently with different filters on board. > > Here is what happens. When one puts on "dual passband," the inner passband > that is at full sensitivity is fixed at the 600 hz of the narrower roofing > filter. That PB does not change with any PB tuning adjustments. > > The outside PB is about 25 DB down. For me, that is too much!!! I would > rather this be down more like 15 DB. At 25 DB down, I can hear there are > stations outside the inner PB, but I can not copy them at the same time as > the station in the center. > > The outer PB is tipped, that is, the high frequency side of the inner filter > is five to ten DB stronger than the low side. Seems like it ought to be in > balance. > > PB shift or PB Hi / Lo cut, both do exactly the same thing when in dual PB > mode. They narrow up the outer filter, down to the inner filter at the > narrowest. They do not, for example, I might have thought the in HI /Lo > mode, you might be able to chop off the upper or lower context independently, > but you can not. > > 73, Fred - kt5x > > _______________________________________________ > 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
