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Not really, that's the bandwidth of an average mid-end SDR like LimeSDR(300$) or BladeRF(500$)

I have never heard of a LimeSDR putting out a 54Mhz wide signal for broadcast. Can you describe how you are configuring things?

Haven't worked with LimeSDR myself, but here's the paper that suggests that it's possible https://upcommons.upc.edu/bitstream/handle/2117/119623/memor...