The brand-new PN400 Phase Noise Test System is available for purchase! →

jraymond

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  • September 21, 2020 at 11:11 am in reply to: BB60C not working with HDSDR v2.80 #237542
    jraymond
    Participant

    Recompiling with the latest libraries did the trick. I used Visual Studio Community Edition 2019.

    August 31, 2020 at 3:42 pm in reply to: Using 10 dB coupler for return loss measurement & 20 dB pad placement #237448
    jraymond
    Participant

    Thanks for the info.

    For cases where accuracy is needed below -40 dB the procedure is:
    1. Connect TG to SA through circuit to use as 0 dB reference.
    2. Store Thru
    3. Connect 20 dB attenuator between TG and circuit.
    4. Store 20 dB Pad
    5. Remove 20 dB attenuator, reconnect circuit. Now system is corrected for readings below -40 dB.

    It’s steps 3 – 5 that weren’t entirely clear to me from the manual.

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