That's exactly right, Phil. 73,
Scott K9MA On Feb 23, 2011, at 3:28 PM, Phil Hystad wrote: > Thanks for all the answers. > > I was most curious as to the filter width (cursor) and the signal after the > filter. Thus, my setup question/or premiss was setting the stage for my > ultimate question on the filter. > > So, what I seem to be understanding from these answers is that the filter > width itself does not affect the display of the signal I am seeing. Thus, if > I am looking at a 6 KHz wide signal and I apply my 400 Hz filter, the 6 KHz > signal displayed on the screen it left alone and unaffected by my filter > choice other then the fact that the cursor itself has changed size. > > phil > > On Feb 23, 2011, at 11:08 AM, Scott Ellington wrote: > >> The K3 IF output to the P3 comes from the Post-amp following the first >> mixer, ahead of the crystal filters. The only upstream filters are the >> broad bandpass filters, each of which covers an entire band. In addition, >> the K3 applies no AGC to the stages ahead of the IF output, which makes >> possible the P3 absolute amplitude calibration. It's also the reason the P3 >> has a relay-controlled amplifier, which you will hear switching out whenever >> really strong signals appear on the band. This keeps the ADC in the P3 from >> saturating. >> >> 73, >> >> Scott K9MA >> >> >> On Feb 23, 2011, at 12:37 PM, Bill K9YEQ wrote: >> >>> >>> Notice that changing the filters does nothing to the display. So the >>> signal sample is ahead of them. >>> >>> Bill >>> K9YEQ >>> >>> >>> -----Original Message----- >>> From: elecraft-boun...@mailman.qth.net >>> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil Hystad >>> Sent: Wednesday, February 23, 2011 11:57 AM >>> To: elecraft@mailman.qth.net >>> Subject: [Elecraft] P3 display... >>> >>> I have a question about the P3 -- the cursor width shows the filter width. >>> But the P3 shows signals outside of the filter bandwidth. This must mean >>> that the sample of the IF signal is before the roofing filters. If that is >>> the case then I am assuming that the signal within the frame of the cursor >>> is not a signal that has passed through my roofing filters. >>> >>> Is this a correct interpretation? >>> >>> 73, phil, K7PEH >>> >> >> Scott Ellington >> Madison, Wisconsin >> USA >> >> >> >> ______________________________________________________________ >> 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 > > ______________________________________________________________ > 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 Scott Ellington Madison, Wisconsin USA ______________________________________________________________ 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
