Sample question:
How can I send custom EWS (Emergency Warning Signals) over DAB+ using a SDR like HackRF One?
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How can I send custom EWS (Emergency Warning Signals) over DAB+ using a SDR like HackRF One?
https://ham.stackexchange.com/ (Amateur Radio)
Seems a good bet.
There are a few technically-focused sites on the network, knowing what your specific question is might narrow down the scope somewhat.