Don, tnx for the answer. Yes, the difference was small. Tnx for the info about 20 Hz, then I now the limitation of the construction.
Yes I can use the FL1 (open) as both TX and RX (well of course TX is alway using FL1). But if I want something more narrow I like to use FL2 - FL4. And now I know that I can get in 20 or so Hz if I work hard enough. :-) But the main problem here is that I cannot adjust my filters at all right now. :-( I can move the BFO (change the pitch) as long as I am in cal fil but as soon as I save the filter and return to listen the pitch has changed to "default". The BFO-value _has_ changed, it _has_ been saved. (I see the display showing BFO freq for a short time). But still - the pitch is where it was before I changed the BFO-value. And I have changed it much - like 50 to 100 units. USB, LSB, CW - the mode does no difference. So: Received pitch of the signal transmitted from my 2:nd TRX: 1500 Hz The BFO value is (lets say) 128 I change the BFO value too 100 I hear (and see on the waterfall) that the pitch is changing. I press XFIL (to save) Display shows BFO freq for a short time. I press XFIL a couple of times to "get round" to FL1 again. The pitch has now jumped back to 1500 The BFO-value is at it's saved 100 I can now lower the BFO value once more and when I come around the pitch will be 1500 and the BFO is saved with the new value. Isn't it suppose to work like: Change the BFO to get the correct pitch Save Return to the filter and the pitch is where you programmed it to be. 73 de SM0RVV ./Erik 2012/4/29 Don Wilhelm <w3...@embarqmail.com> > Erik, > > Do you see the BFO frequency flashed on the display when you exit? If so, > you are verifying that the value is being saved. > > Fact, the DAC resolution in the K2 is about 20 Hz. If the difference is > less than 20 Hz, it my be a situation you have to live with - you have > reached the limit. > > Are you using SSB or the RTTY filter set? If so, there should be no > difference in the VFO between RX and TX. If you are listening with a > filter other than FL1, then yes the BFO will be switched to FL1 for TX. If > your goal is no difference between TX and RX, then you will have to RX with > FL1 > > If you use an RX filter different than FL1, you will have to unlock TX and > RX in your software to keep from "walking the band". Most packages allow > that - I don't know about the NUE-PSK, but II would think that is a > required condition. > > 73, > Don W3FPR > > > On 4/29/2012 3:28 PM, Erik Linder wrote: > >> Hi all, >> >> I decided to recalibrate the filters in my K2 because I noticed a small >> RX-TX frequency difference which made it hard to use my NUE-PSK. >> >> But I didn't get the calibration working... >> >> I enter filter calibration menu. I select FL1 in open-mode. I adjust (in >> RX) the BFO and watch the audio move on the waterfall (change pitch). All >> seems 100% OK. >> Then I press XFIL to save the value. (the freq-probe is in TP2 - duoble >> checked). >> When I then return to FL1 the pitch is back where it was from the start. >> >> I first thaught that the value did not get saved, but after re-checking >> the >> BFO-D/A value it has been saved. >> I then tried to measure U8 pin 16 to see if the control voltage is >> changing >> - yes it is. >> The voltage changes when I change the BFO-D/A value in cal filter. The >> value I choose will be saved and I can measure the same voltage when I >> return to FL1. >> >> But the BFO keeps resetting itself no matter what value I choose in cal >> filter. The most strange thing is that the BFO changes as long as I am in >> cal filter menu, it resets itself when I change filter (saving the value) >> >> I had the SSB option in, but in the troubleshooting I removed it. The >> behavior is still the same with or without the SSB option plugged in. >> >> So... Can anyone give me a clue what's going on here? >> >> Tnx in advance and 73 de SM0RVV >> ./Erik >> ______________________________**______________________________**__ >> Elecraft mailing list >> Home: >> http://mailman.qth.net/**mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >> Help: http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm> >> Post: mailto:elecr...@mailman.qth.**net <Elecraft@mailman.qth.net> >> >> 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
