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Any cord that needs to be connected to your system should have a ferrite choke on it to help reduce radio interference.įor the actual SDR hardware, there are a few big players in the consumer market: HackRF One, LimeSDR (mini), and RTL-SDR dongle. In short, the fewer cords connected to your system, the better.
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Because radio frequencies are essentially generated by applying voltage to a conductive material, a computer’s power cord can act as an antenna that transmits noise that can interfere with what you are trying to listen to. The slightly less obvious reason to use a laptop is because of the power cord.
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For example, GPS signals are fairly weak and often get blocked by buildings. The radio signals you want to look at may not be accessible from the comfort of your home. One question you might be muttering is, “Why a laptop and not a desktop?” There are a few answers to this question, so I’ll start with the obvious. It is possible that most of the tasks you want to perform can be done through a VM, but there is also a good chance GNU Radio’s console will start throwing a lot of underflows (U) or overflows (O) depending on what you’re trying to do. This approach can cause issues because the virtual USB interface might not be able to keep up with the amount of data flowing to and from the SDR. When trying new software, people typically spin up a virtual machine (VM) and tinker away as to not ruin their host machine. One thing that I learned through trials and tribulations is that a decent laptop with good battery life is the foundation of a reliable SDR setup.
BUYING HACKRF ONE SOFTWARE
By Brian Berg in Hardware Security Assessment, Penetration Testing, Security Testing & Analysisįor my first post on software-defined radios (SDRs), I’d like to start off by talking about a few things that most people find out through either experience or spending hours hunting on Google (or never figure out at all, and chalk the problem up to software bugs and hardware gremlins).