Goonhilly WEB-SDR is not on Frequency ?!

  • Hi,


    after change of the bandplan the UK WEB-Sdr is -80Hz off frequency.


    By the way, it is not very smart to set the center frequency of the Sdr to the beacon frequency because of the zero point at the middle, what is shown as a black bar.


    It will be nice if somebody can inform the responsible old man :-)


    73, Mike

  • Hallo Mike DK1ML


    Which bar do you mean ? The left or right one ? The left bar sits on 10489750.00 and the right one on 10489750.16 kHz. In between it's on 10489750.08. The left bar is constant modulated and the right bar is wider and can be PSK-modulated. So I think the beacon QRG is correct adjusted. On your screenshot I can see the same result as in my browser.


    Any other opinions ?


  • Hi Thomas,


    I am talking about the center beacon at 10.489.750,00 as shown on the picture.



    This is the center frequency of the SDR range at 0 (zero) hertz.

    All SDR receivers have this "blind" frequency in the middle of the reception range, sometimes with a phantom signal if the balance is not accurate or if there is some 50hz hum.


    I have set the range of my online WEB SDR 5khz left of an important signal.


    But more important to me is that you confirmed the same frequency error at 10489750.08


    73, Mike

  • But more important to me is that you confirmed the same frequency error at 10489750.08

    No, this is the frequency between the two bars, your "phantom error" frequency. The center bar/beacon is on 10489750.00. Where is the problem ?


    EDIT/Nachtrag:


    Now I see the problem. We are talking of both bar's, look at http://websdr.is0grb.it:8901/ , zoom in and we will see the error of 80 Hz at Goonhilly. You are right. Btw. http://appr.org.br:8902/ is also misadjusted.

    Or is this a wrong interpretation of the PSK-signal by me ?