Hi, Ross. I'm also using the SDR-1000 for WSPR. In fact, I received your signal four times this morning!
No, the signal should be quite narrow, and if you have other products within 25dB or so below or above, it's not normal...but I have seen it. I would suspect a mixing artifact from some other program which has the VAC open, even if they don't seem to be outputting sound. When I had the VAC as the "default" sound device in windows (before WSPR supported selecting different devices), this would happen whenever I had IE open, of all things. Maybe I should offer my 100WPA for sale, as I seem to be using the SDR-1000 for QRPp almost exclusively :-). --bruce W1BW On Apr 2, 2008, at 7:57 PM, Ross Biggar wrote: > I am using my QRP SDR1000 to run WSPR, which is Joe's K1JT new mode > (aided by Murray ZL1BPU). > > The 1watt SDR1000 is ideal for the mode, and I am monitoring my > transmitter on another receiver and computer also running WSPR and > Winrad. > > I can see that the SDR1000 is transmitting the 1500hz tone, but it > is also transmitting 2 tones, probably exactly 100hz above and below > the 1500hz main signal. These two signals are about 24 to 26db below > the main signal. > They are very obvious on both the WSPR screen and on Winrad. > > My questions therefore are, > Are these signals due to the SDR1000 and if so how do I reduce the > amplitude of these 2 signals. > > Comments please > > Thanks and best wishes to all Flexers > Ross > ZL1WN > > > __________ Information from ESET NOD32 Antivirus, version of virus > signature database 2995 (20080402) __________ > > The message was checked by ESET NOD32 Antivirus. > > http://www.eset.com > _______________________________________________ > FlexRadio Systems Mailing List > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > Knowledge Base: http://kb.flex-radio.com/ Homepage: > http://www.flex-radio.com/ > _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/
