16 bit, SDR: The new Redpitaya!

At last: It works!

The new Redpitaya (RP-16) has arrived here, see photo gallery at the bottom. With now 16 bit and a largely improved input section, it promises to match amateur’s and SWL’s needs for an able SDR transceiver or receiver even better than its predecessors with 12 and 14 bit.

My initial idea was to get a nice, fool-proof, competetive SDR with up to 30 MHz bandwidth for just around 450$. However, from start, the RP-16 seems to test more me than vice versa. First, me and a most capable friend didn’t get it going at all. Here, secondly, Joerg, DD8JM, stepped in and did wonders with the Micro card from which the RP-16 has to read its software after sniffing power. It turned out that the card had two partitions and three software versions on the card – which you cannot see with Windows od Mac OS, but with Linux only. And RP didn’t liked that. Thankfully, Jörg tided up the card, and it worked – at least over a router.

The only SDR software available at early July 2019 seems to be openHPSDR. So, over a modem it all worked in general, see screenshot at top. But there were annoying audio drops and occasional overdrive from strong signals – despite an extra 30 MHz low-pass filter from Heros and bright daytime.

Despite having worked on this for many hours, I am still not quite sure who is testing whom. At least so far, my test of the new Redpitaya was disappointing. Maybe it will live up to my expectations under another software, namely Simon Brown’s (G4ELI) SDRC. I will see, because with 69g only, it doesn’t make an ideal paperweight …

If you made different experiences, tell me!
I would be more than pleased to jump in and spread such welcomed news.

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