Isn't part of the reason for split to make for a cleaner signal? Seems to me that would still hold true no matter where it converts to analog, wouldn't it? Somebody is doing an inverse FFT which I assume is the problem area. I never quite understood the FFT reason for putting the signal in the 1500-2000 offset thought I am fairly literate in FFT effects.
73 Mike W9MDB -----Original Message----- From: Bill Somerville [mailto:[email protected]] Sent: Tuesday, June 02, 2015 4:46 AM To: [email protected] Subject: Re: [wsjt-devel] WSPR issue after JT split operation On 02/06/2015 09:35, Bob Thornton wrote: Hi Bob, > My first build of the dev version, 1.6.0 r5483. I use a Flex 6300 with Kenwood TS2000 in settings and had Split operation using Rig as used for JT65/JT9 mode. On selecting WSPR and rediscovered the issues already covered of failing to Tx without hopping enabled, and continuous Tx when enabled, I also found I was Txing "out of band" ie 500 Hz too low. So it seems to continue with the use of Slice B for transmit and set this 500 Hz lower than standard dial but not adjust the 1500 Hz audio by the same amount. Probably WSPR does not need this split operation and something needs to ensure that Slice B is fixed on nominal dial in WSPR mode. Split needs to be retained because of the audio settings as typically we have DAX Rx 1 and DAX Tx 2 in settings for split operation on JT modes, else would need separate audio setups for the two modes. > > After removing split operation and using single slice A I have had a successful overnight WSPR session. Before addressing this I would like to know why you are using split operating mode at all with a FlexRadio 6300? I ask because I was under the impression that you have > 4kHz bandwidth available for both Tx and Rx and that along with a pure digital audio chain should mean that all the benefits available from split operation are not necessary for you. > > (Apologies if double posted, bounced as sent from wrong account.) > > Bob Thornton > > G3WKW 73 Bill G4WJS. ---------------------------------------------------------------------------- -- _______________________________________________ wsjt-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/wsjt-devel ------------------------------------------------------------------------------ _______________________________________________ wsjt-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/wsjt-devel
