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CW Skimmer SDR Bridge Problem
W9WLX_Chuck
Member ✭✭
I have a 6500 at 1.10.8 beta running CW Skimmer 1.8.3.350 with SDR Bridge 1.5.1 on Windows 10. I seem to have everything working, but there is an issue with the waterfall frequency on CW Skimmer.
All frequencies sync and follow--the slice receiver, SDR Bridge and the TX frequency on CW Skimmer. If I set the TX frequency on skimmer to the center frequency of the DAX IQ stream, it works as expected. However, if I change the slice frequency, off the center stream frequency, it shifts in the opposite direction. For example, if my center stream frequency is 7.020 and I double click on a station at 7.022 on the Skimmer waterfall, the slice receiver will follow and go to 7.022, however the station is really at 7.018.
I tried changing the CW sideband on the Phone/CW tab in Radio Setup, but it made no difference. Any ideas what I may have set incorrectly?
Chuck-W9WLX
All frequencies sync and follow--the slice receiver, SDR Bridge and the TX frequency on CW Skimmer. If I set the TX frequency on skimmer to the center frequency of the DAX IQ stream, it works as expected. However, if I change the slice frequency, off the center stream frequency, it shifts in the opposite direction. For example, if my center stream frequency is 7.020 and I double click on a station at 7.022 on the Skimmer waterfall, the slice receiver will follow and go to 7.022, however the station is really at 7.018.
I tried changing the CW sideband on the Phone/CW tab in Radio Setup, but it made no difference. Any ideas what I may have set incorrectly?
Chuck-W9WLX
0
Answers
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I've resolved the problem. In the CW Skimmer application, I had to swap the I/Q channels. Once I made the change, the waterfall on CW Simmer was in sync with the Flex's panadapter.
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Hi Chuck,
Is this the setting you changed in the snapshot below? The Arrow points to the correct setting and I assume you had the Q/I selection set. Is that correct? If so I'll add the symptom and fix to the next version of the troubleshooting notes. They are available on the SDR-Bridge site and my web page:
http://www.nn4zz.com/Data/NN4ZZ%20CwSkimmer%20Bridge%20setup%2018-Feb-2016.pdf
Regards, Al / NN4ZZ
al (at) nn4zz (dot) com
SSDR / DAX / CAT/ 6700 - V 1.10.16
Win10
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Yes, this is the setting. The default when I installed CW Skimmer was Q/I and it needs to be I/Q. I had not found the support document when I was initially configuring and I was using the trial and error method!
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Chuck,
Thanks, I updated my setup and troubleshooing guide with your notes and the solution. The new version is dated 25-Mar-2017 and posted to my web page. See page 25.
http://www.nn4zz.com/FLEX6700.htm in the QuickLinks section or directly at:
http://www.nn4zz.com/Data/NN4ZZ%20CwSkimmer%20Bridge%20setup%2025-Mar-2107.pdf
I also sent a copy to Ed (SDR-Bridge author) to update his SDR-Bridge web page when he gets a chance.
Regards, Al / NN4ZZ
al (at) nn4zz (dot) com
SSDR / DAX / CAT/ 6700 - V 1.10.16
Win100
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