Alan, Thank you for info , I knew it was a firmware bug ,did not know that it had been reported.
Sorry for the bandwidth . 73 Ken K5DNL ----------------------------------------------------------- --- On Sun, 4/17/11, Alan Bloom <[email protected]> wrote: > From: Alan Bloom <[email protected]> > Subject: Re: [Elecraft] K3_P3_160_CW > To: "Ken Roberson" <[email protected]> > Cc: "Elecraft Elecraft" <[email protected]> > Date: Sunday, April 17, 2011, 11:20 PM > The P3 keeps track of the > preamp/attenuator status reported by the K3 so > that the dBm or S-unit display reads accurately. That > can lead to some > non-intuitive behavior. For example, turning on the > K3 preamp typically > makes the noise level on the P3 go down rather than > up. The reason is > that the P3 is turning down its gain to compensate for the > increased > gain in the K3. > > However this doesn't always work correctly when switching > the RX antenna > on the K3. Currently the K3 does not send an update > to the P3 if > switching antennas causes the preamp or attenuator status > to change. > This is on Wayne's bug list. > > Alan N1AL > > > On Sun, 2011-04-17 at 12:21 -0700, Ken Roberson wrote: > > Wayne, > > > > While working 160M DX last winter I noticed that when > I > > Switch from RX antenna (Beverage) and back to TX > antenna > > That the base line (Noise floor) on the P3 was about 2 > S unites > > Less than when I changes to the RX antenna. > > > > With the default antenna ( TX antenna ) PreAmp = off > and ATT = ON > > Switch to RX antenna (with the preamp off) turn the > preamp on and switch back to normal antenna. > > Now if you switch the preamp on and off, the base line > will return to normal. > > Hard for me to explain. > > > > Thanks Ken K5DNL > > > > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:[email protected] > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
