The transmission over Qatar Oscar 100 satellite with SDR Console

Le satellite Es'Hail 2 avec transpondeurs radioamateurs

The amateur radio transponders of the satellite

QO-100 fréquences de montées et descentes

The satellite offers two transponders for amateur radio amateurs :

  • A transponder for narrow-band modes (NB: Narrow band)
  • A transponder for wideband television transmission (WB: Wide band)

If you would like more information about satellite, I invite you to read the introduction to my article dedicated to reception. The table below specifies the descent and ascent frequencies on which we will transmit to be retransmitted by the transponders. You notice that unlike the two bands in descent, the polarization of the rising signals is in right circular polarization (RHCP) for both transponders, wideband (for digital television) and narrowband (for signals of 2.7kHz maximum).

One thought on “The transmission over Qatar Oscar 100 satellite with SDR Console

  1. Bonjour Christian,
    Superbe travail…Bravo et merci de faire partager.
    Je voudrais démarrer sur QO-100 sans aucune expérience satellite (OM).
    J’ai compris que dans votre description de la partie réception, vous utilisiez un dongle RTL mais qu’ensuite lorsque vous décrivez la partie émission, vous utilisez un transceiver Lime SDR pour l’émission et la réception.
    – Je ne comprends pas bien quels sont les éléments de la photo ci-dessus..?
    – a priori le mode de fonctionnement est le full-duplex mais je ne vois pas comment il est possible de connecter simultanément la sortie de la tête 10GHz et l’antenne hélice d’émission via les différents preamplis et amplis mentionnées.
    Merci pour votre aide.
    Gérard
    F6EHJ/FY7BC

    (Translation)
    Hello Christian,
    Great work…Well done and thank you for sharing.
    I would like to start on QO-100 without any satellite experience (OM).
    I understand that in your description of the reception part, you use an RTL dongle but then when you describe the transmission part, you use a Lime SDR transceiver for transmission and reception.
    – I don’t quite understand what the elements of the picture above are…?
    – a priori the operating mode is full-duplex but I don’t see how it is possible to connect simultaneously the output of the 10GHz head and the transmission propeller antenna via the different preamps and amplifiers mentioned.
    Thank you for your help.
    Gérard
    F6EHJ/FY7BC

Leave a Reply

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