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Adaptive Pre-Distortion using V4.2.18

KD0RC
KD0RC Member, Super Elmer Moderator
in Peripherals & Station Integration

I got my CleanRF.com -60 dB RF sampler yesterday (ordered Thursday evening).

IMG_20260427_144419277.jpg

I have it connected to my KPA 500 with the RF tap going to RXA. I set it up as follows:

image.png

I tested it in Full Duplex (FDX) by opening a second panadapter, putting the second slice RX on my dummy load, while transmitting into my antenna. With APD off, I could see a few artifacts from the amp. With APD engaged, it was very clean. This is just a visual qualitative assessment, not a quantitative one, but it clearly shows signal purity improvement.

Comments

  • John K3MA
    John K3MA Member ✭✭✭

    You can run a two tone test signal with it off and one and you can count the db improvement of the 3rd order and greater harmonics. Then you can quantify the improvement.

  • ScottGibson
    ScottGibson Member ✭
    I wonder if this would work for SmartSDR for Mac and a KPA500/KAT500 combo. I don't see an APD tab.

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