Fix strange LO/HI CUT interactions. (Or tell me that the way it works is intentional or some limitation of the DSP algorithms used.)
Here are some examples of unexpected behavior with FW 3.68 in DATA-A mode. Numbers in parentheses are the values I get on my K3. Not an interaction, but unexpected: In LSB, DATA, DATA-R, CW, and CW-R modes, the LO/HI steps are on x.x5 kHz boundaries (e.g. 0.15, 0.25, 0.35, etc.). In USB mode, they're on x.1x kHz boundaries (e.g. 0.10, 0.20. 0.30, etc.). Set HI=3.05 and LO=0.55. - Now set HI as high as it will go. Note the value (4.20) - Now set HI back to 3.05, and set LO=2.05. - Again set HI as high as it will go. Note the value (3.15) So with LO=0.55, HImax=4.20, but with LO=2.05, HImax=3.15 Set HI=3.05 and LO=0.55 - Now set HI as high as it will go. (4.20) - Now set LO as high as it will go. Note the value (1.05) - Now set HI=3.15 - Now set LO as high as it will go. Note the value (2.05) So with HI=4.20, LOmax=1.05, but with HI=3.15, LOmax=2.05 Set HI=3.05 and LO=0.00. - Now set HI as low as it will go. Note the value (0.75) - Set HI back to 3.05, and set LO=0.25. - Again set HI as low as it will go. Note the value (0.55) So with LO=0.00, HImin=0.75, but with LO=0.25, HImin=0.55 - Bonus: now set LO as low as it will go (0.25) So with HI=0.75+, LOmin=0.00, but with HI=0.55, LOmin=0.25 These anomalies show up in USB and LSB modes as well, but you're not likely to run into them in normal voice situations. Likewise there are similar interactions in CW mode, but I never use LO/HI CUT in CW mode. 73 -- Joe KB8AP On Dec 23, 2009, at 10:02 AM, Wayne Burdick wrote: > As we head into 2010, we'd like to refresh the master firmware list > based on your input. Items already on the list have priority, of > course, but this is a great opportunity to let us know what else is > missing or could be improved. Our goal is to make the K3 as easy to > use as possible, while providing the advanced features you need for > specific operating situations. ______________________________________________________________ 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
