Crossband A/B was quite worse in one of the early band independence beta's and issues were reported to Elecraft. Somewhere in there Wayne cleaned up some artifacts in the switch (e.g. could hear the oscillator settle in) and significantly tightened the times -- the pause currently appears to be quite short.
Rig has to flip a lot of data and settle a lot of circuit states in an A/B crossband switch. But there is a clearly longer pause to RX when one does a straight band change. It is interesting that noone has reported the pause for band change, as if we clearly expect that. Just went through and rechecked and remeasured all the timings in firmware 3.04. Using Spectrogram 15 audio breaks show up very clearly and can be measured. The pauses are consistent for the kind of switching done. On my K3 #1239 an A/B crossband switch (80/40) creates an audio pause of 230 milliseconds. A straight band change on the other hand (which moves the main RX/TX but leaves the sub RX where it was) creates an audio pause of 700 milliseconds. As you report, an inband switch does not cause a pause, with nothing detectable on Spectrogram. 73, Guy. ----- Original Message ----- From: "ab2tc" <[email protected]> To: <[email protected]> Sent: Friday, March 27, 2009 6:14 PM Subject: Re: [Elecraft] K3 Beta firmware Rev. 3.04: AGC fixed; various improvements > > Hi Wayne, > > Another minor quirk to report regarding the cross band A/B switching. If > the B VFO is on another band, pressing the A->B button causes a minor > pause in the audio. No relays clicking but a definite pause in the > audio. No big deal at all, but when A and B are on the same band, this > does not occur. > > Knut - AB2TC > > wayne burdick (via Nabble) wrote: >> Guess I forgot that it didn't work right before :) >> >> Have fun-- >> >> Wayne >> N6KR >> >> ab2tc wrote: >> >> > I just made the upgrade to 3.04 after a long period of skipping >> > upgrades. I am very happy to report that the A/B VFO switch now works >> > across bands *without* having the sub-receiver. I am not sure why >> > Elecraft has been so reluctant to announce this... >> >> >> --- >> >> http://www.elecraft.com >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:elecr...@... >> <http://n2.nabble.com/user/SendEmail.jtp?type=node&node=2541524&i=0> >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> >> >> ------------------------------------------------------------------------ >> This email is a reply to your post @ >> http://n2.nabble.com/K3-Beta-firmware-Rev.-3.04%3A-AGC-fixed--various-improvements-tp2540723p2541524.html >> You can reply by email or by visting the link above. >> >> ------------------------------------------------------------------------ >> >> >> No virus found in this incoming message. >> Checked by AVG - www.avg.com >> Version: 8.0.238 / Virus Database: 270.11.29/2024 - Release Date: >> 03/26/09 07:12:00 >> >> > > > > ----- > AB2TC - Knut > -- > View this message in context: > http://n2.nabble.com/K3-Beta-firmware-Rev.-3.04%3A-AGC-fixed--various-improvements-tp2540723p2546950.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
