4 ms·
Is it just me or does it seem this would be trivial to detect with tangible proof? One or several software-defined radios can be set up to listen to the full br
by ashleyn 8y ago
Is it just me or does it seem this would be trivial to detect with tangible proof? One or several software-defined radios can be set up to listen to the full breadth of the radio spectrum. If an incident like this is ever reported again, correlate the waterfall view with the time of the incident, and see if there were any increases in activity in that period. I currently believe this was a mass hysteria.
- seventytwo 8y agoIt's not trivial. Beams could be narrow and could only be on for short periods of time. Combine that with all kinds of noise, stray signals, and other false positives, and you'd still be searching for a needle in a haystack. It's not clear what frequency to even look for...
- LeifCarrotson 8y agoSDR radios generally have a somewhat limited spectrum. A few MHz to a few GHz is fine for most data transmit/recieve projects, but there's no great reason to use those frequencies for this. Also, one thing you pay for through the nose when buying a spectrum analyzer is scan time. If you want narrow buckets and a broad frequency, a cheap SDR is going to take on the order of one second to scan from 1 MHz to 6 GHz. If your radio pulse lasts for a few milliseconds and has a bandwidth of a few kHz, you're unlikely to see it unless you have a big FPGA, big RAM buffer, and high-end filters on a $XXXXX scope.
- deleted 8y ago[deleted]
- pmorici 8y agoHigh end state of the art spectrum analyzers from Keysight and similar companies can look at 1Ghz of bandwidth at a time and they cost upwards of $200k and take ~12u of rack space. RF is anything from 3kHz to 300Ghz. Unlikely that a $50 hobby SDR with 20Mhz of bandwidth is going to glean much of use unless you get lottery lucky.