Unverified50% confidenceFactExact time
在 RTL-SDR 之前，具备类似频率覆盖能力的软件定义无线电设备（如 Ettus USRP）售价在数千美元以上，RTL-SDR 售价仅 10-30 美元
1
Sources
50%
Confidence
Long-term
Relevance
8/28/2026
First Seen
Sources
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