Control your transceiver and upconverter via SDR Console


Following my previous article dedicated to the transmission to the Qatar Oscar 100 satellite with SDR technology (LimeSDR, Adalm pluto), here is an article that will interest this time those who are equipped with up-converter or transverter and who use a “modern” station equipped with a serial CAT communication interface. Moreover, this function is simply useful for those who operate an SDR receiver associated with a transmitter, which can be used independently of satellite radio traffic. This function called “External radio” (as described here) is available since version 3.0.17 of SDR Console, software developed by Simon G4ELI.

Here is what the “External radio” function provides in detail:

  • Controls the transmitter frequency, depending on the SDR reception (SDR to Radio direction).
  • Function can be activated/disactivated
  • (inversely) Controls the reception selection when the transmitter frequency changes (Radio to SDR direction).
  • Function can be activated/disactivatedChanging the modes of the controlled transmitter
  • Indicating the transmitter’s status
  • Muting from reception to transmission
  • Reducing the SDR IQ reception gain when switching to transmission
  • Setting the offset between the SDR reception frequency and the frequency of the controlled radio transmitter
  • Possible control of 2 transmitters (switchable to either one or the other)
  • Setting the appearance (4 recordable configurations)
  • Possible setting of a RIT Offset

Compatible radios are those supported by OmniRig (List of controllable radio💬), and can still be extended.

I suggest you discover how it works, with this short video. On the left, you see a Yaesu FT-817 connected via serial port to SDR Console. On the right you can see the frequency, mode and transmission status control on the “External Radio” panel of SDR Console.

Below, here is the synoptic of the installation that is being performed. It consists of two parallel segments:

Complete diagram: QO100 transmission with up-converter, and SDR Console reception

By reading on, you will find step by step the operations to be implemented to achieve this result.

This article is “multi-page”, to be browsed from one page to another or directly from the contents to the desired page.

2 thoughts on “Control your transceiver and upconverter via SDR Console

  1. Bonjour Christian

    J’ai suivi à la lettre ce qui concerne le pilote d’un ft 817 avec sdr console. Ça fonctionne point de vue pilotage mais, néanmoins j’ai constaté ceci :

    – Le Up converter sur la fonction du ft 817 est réglé sur : 10345.500.000
    – Sur Sdr console j’affiche avec le vernier du FT 817 la fréquence de 10.489.760.
    – Sur l’écran du Ft 817 l’affichage de la fréquence est de 144.260.000
    Aux vues du up converter pas de problèmes.
    Par contre lorsque je passe en émission et en vérifiant celle ci sur le site websdr IS0GBR, mon émission se fait sur : 10.489.757.220.
    10.489.760.000 – 10.489.757.220 = Ce qui fait un écart de : +278.
    Ma question : Comment je peux corriger cet écart ?.
    Merci pour la réponse. Cordialement F3CJ Joël

    Hello Christian.

    I followed exactly what was said about the ft 817 pilot with sdr console. It works from a piloting point of view but, nevertheless, I noticed this:

    – The up converter on the function of the ft 817 is set to : 10345.500.000
    – On Sdr console I display with the vernier of the FT 817 the frequency of 10.489.760.
    – On the screen of the Ft 817 the frequency is 144.260.000
    In view of the up converter no problems.
    On the other hand, when I go on air and check it on the websdr IS0GBR site, my signal transmission is on : 10.489.757.220.
    10.489.760.000 – 10.489.757.220 = Which makes a difference of : +278.
    My question : How can I correct this deviation ?.
    Thank you for the answer. Sincerely F3CJ Joël

    1. Joël, ravis de savoir que cela fonctionne.
      Pour régler l’écart constaté entre l’émission réel, et la fréquence prévue, il existe deux moyens :
      1) Corriger la fréquence de shift déjà indiquée en ajoutant ou soustrayant (ajoutant à priori dans ton cas l’écart relevée, donc de mettre 10345.502.780.)
      2) Utiliser une fonction « Fixed Offset » de SDR Console que je n’ai effectivement pas décrite dans mon article, mais dont voici le détail
      a. Dans le panneau des Options de External Radio (clic que le point d’interrogation), dans l’onglet Radio (OmniRig), cocher Show in Toolbar Fixed Offset. Fermer le panneau options. Option SDR Console Fixed Offset External Radio
      b. Cliquer sur le nouveau bouton disponible +/- (plus/moins) dans le panneau External Radio. SDR Console Offet button
      c. Indiquer la valeur de l’Offet et le sens de l’offset. Cocher Enable.SDR Console Offset value

      J’espère que ces explications te permettront d’émettre à présent sur la fréquence correspondante attendue.

      Bon trafic que QO-100, 73

      Joël, glad to know it works.
      There are two ways to deal with the difference between the observed frequency and the planned frequency:
      1) Correct the shift frequency already indicated by adding or subtracting (adding in your case the deviation found, so put 10345.502.780).
      2) Use a “Fixed Offset” function of SDR Console that I didn’t actually describe in my article, but here are the details of it
      a. In the External Radio Options panel (click only the question mark), in the Radio tab (OmniRig), check Show in Toolbar Fixed Offset. Close the Options Panel. Option SDR Console Fixed Offset External Radio
      b. Click on the new available +/- (plus/minus) button in the External Radio panel.SDR Console Offet button
      c. Indicate the Offset value and the offset direction. Check Enable. SDR Console Offset value

      I hope that these explanations will now allow you to transmit on the corresponding frequency expected.


Leave a Reply

Your email address will not be published. Required fields are marked *