Grant, The compensation between 'nor' and 'abs' is done in software, so it may be that something you did in the calibrations has thrown it off a bit - it is not hard to re-do both the RF gain and S-meter calibrations, so I would do them both (in that order).
73, Don W3FPR Grant Youngman wrote: > Don .. > > I realized that as I was redoing the adjustments one more time -- no > separate S-meter adjustments for the Sub. I'll start from scratch. > > But the results do seem a bit odd. As it now sits on the Main (and > this is after mistakenly tweaking S_meter cal on the Sub), a 50uV > signal yields an S-7 with preamp off and S-9 with preamp on, with the > meter in Nor mode. In Abs mode, I see S-7 with preamp off and S-6 > with preamp ON. > > It's certainly possible (most likely?) that there's a cockpit problem > here, but the results I'm getting don't look right. Prior to all of > this, there was no change in S-meter reading when activating the > preamp in "abs" mode. > > Grant/NQ5T > > > On Nov 4, 2009, at 3:58 PM, Don Wilhelm wrote: > > >> Grant, >> >> Re-do the S-meter Cal on the main receiver. There seems to be some >> confusion on this topic, but there is only *one* set of S-meter >> calibration settings (at least that is the way it is right now). So >> when you thought you were calibrating the subRX S-meter, you likely >> messed up the settings for both the main RX and the sub - I can't >> say for certain but I think it has something to do with the 3 dB pad >> and athe variety of ways to connect the subRX antenna.. >> >> 73, >> Don W3FPR >> >> Grant Youngman wrote: >> >>> Did we ever ever get anything final on the "subtle bug" that may >>> have created a problem with RF Gain calibration in the Mac version >>> of K3 Utility? >>> >>> I used the new test version sent out a few days ago, calibrated to >>> an XG2 on 20M. Didn't have to adjust S-Meter cal on the Main >>> receiver, but did cal the Sub S-Meter, which I'd ignored up until >>> now. All seemed well, until I powered on the K3 today, and >>> noticed what seemed to be "scotch" S-Meter readings. A recheck >>> with the XG-2 shows only about S-7 with the 50uV test signal. >>> >>> Grant/NQ5T >>> >>> > > ______________________________________________________________ > 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 > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.424 / Virus Database: 270.14.49/2480 - Release Date: 11/04/09 > 07:37:00 > > ______________________________________________________________ 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
