Photo of a rectangular PCB with several pads where edge mount coaxial connectors could be mounted.
https://radiosocial.de/system/media_attachments/files/114/556/768/831/972/972/original/a8e90c04ec8cc32c.jpg
@whitequark Ah, ok, thanks for the clarification. Do they have somehow coupled the LOs in order to get them coherent? Because usually that's the tricky part. AD's "standalone" modulators and demodulators have dedicated LO inputs and outputs so you can daisy-chain them. I always wanted to build a MIMO SDR with them, too.
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