You might see suppression of as high as 70-75 dB, but it varies a bit per-band and with signal pitch. The worst case will still be ~50-55 dB as with other receivers using the same direct-conversion I/Q architecture.
73, Wayne N6KR On May 6, 2013, at 4:41 AM, Bill W4ZV <[email protected]> wrote: > What is the OSB suppression after calibration using this procedure? > > 73, Bill W4ZV > > > wayne burdick wrote >> Hi Jim, >> >> This is most likely related to opposite sideband suppression, not >> filter blow-by. Nominal factory calibration results in OSB suppression >> of around 55-60 dB. You can improve on this using a new procedure we >> developed a month or so ago. It requires a strong signal source on >> each band to be optimized. I can send you the firmware and >> instructions if you're interested. >> >> 73, >> Wayne >> N6KR >> >> On Oct 8, 2012, at 10:46 AM, > >> Jimk8mr@ > >> wrote: >> >>> A recent KX3 owner (# 1677), I've noticed hearing out of passband >>> signals >>> from loud CW stations. I can hear such stations up to several KHz >>> away. I >>> suspect the range is limited by the audio response of the system, >>> including >>> my ears. Both sides of zero beat, though less so on the opposite >>> side of >>> the zero beat. >>> >>> In the CA QSO Party this weekend, maybe the loudest 10% of the >>> stations on >>> 10 CW Saturday afternoon were leaking through. (I've heard the >>> leakage on >>> other bands as well.) >>> >>> I don't have any roofing filters. (I figured any stations weak >>> enough for >>> me to need the filter to hear, would never be able to hear me anyway). >>> >>> Is this normal, or is there some shielding or other issue affecting my >>> unit? (It is a kit version). >>> >>> >>> 73 - Jim K8MR >>> ______________________________________________________________ >>> 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 > > > > > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/KX3-Filter-Blow-By-tp7563848p7573453.html > Sent from the Elecraft mailing list archive at Nabble.com. > ______________________________________________________________ > 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
