You are right, I had set the width as high as I could, which was 4kHz. I didn't move the centre frequency to 2kHz. I have just done it again but this time with the centre frequency set to 2kHz and I see 4kHz width. The highest I can get it up to is 300Hz-4.2kHz.
But, I found something else. I managed to have LO at 0 and HI not go above 3.4kHz. I found out that LO was actually negative, but read as zero as a result of switching mode from Shift/Width to Lo/Hi. It really was negative too, the other sideband came through. I don't understand the display logic here. Surely if LO is negative, which is quite legitimate, it should read so? If negative LO is not really intended if the bandwidth is not really 4 kHz because of Fc, why will it display it as 4kHz? Mike P.B. Christensen wrote: > >> The amplitude appears fairly consistent. I think a simple low pass filter >> is >> all that is needed and a cut off of maybe 7 kHz would be appropriate. >> Maybe >> even lower as this 4kHz ESSB plot with the FM filter shows, the audio >> response is limited above 2.5kHz. > > Mike: > > You may want to revisit that last measurement. My measured data closely > mirrors that shown on N1EU's website with the 6 kHz filter engaged: > > http://n1eu.com/K3/K3_notes.htm > > See chart entitled " Elecraft K3 SSB Receive Passband..." > > Paul, W9AC > > > > > > _______________________________________________ > 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 > > -- View this message in context: http://n2.nabble.com/Heil-Proset---K3-Audio-fixed%2C-sort-of.-tp1076341p1078113.html Sent from the Elecraft mailing list archive at Nabble.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
