Re:The Mystery of the Havana Syndrome
by LeifCarrotson on Sunday November 11, 2018 @11:12AM
(#18427033)
SDR 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.
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.