Also check out the HackRF One! You can look at a much wider spectrum, as well as broadcast. The thing itself is 300$, and completely open. (<a href="https:&#x2F;&#x2F;www.sparkfun.com&#x2F;products&#x2F;13001" rel="nofollow">https:&#x2F;&#x2F;www.sparkfun.com&#x2F;products&#x2F;13001</a>)