Frequency Spectrum Heatmap and Timeline Heatmap See https://ukraine.quassi.nl for the live data. Radio communications across the Russian forces are realy poor, which leads to makeshift solutions! Webreceivers to use: http://websdr.ewi.utwente.nl:8901, antenna located in Enschede, The Netherlands http://tulasdr.fvds.ru:8901 antenna located in…
Category: SDR
Each minute an RF burst is send into the air somewhere in the neighbourhood of my house at the frequency 868.4 MHz in AM modulation. Is this data intended for me? I dont know, so I would like to figure…
Wireless weather stations, car keys, wireless door bells and several other telemetry devices are transmitting their information into the air in the 433 MHz band. The modulation type which is used for these devices is mostly amplitude-shift keying, ASK. The…
Just for some analysis with SDR and for fun I bought a wireless door bell, a Silvercrest model Z31370B. This is a low power 433 MHz device (LPD433). SDR Sharp Quickly after starting up SDR Sharp, tune-in to the…
Today I build my first FM radio. GNU Radio Companion makes the job very easy! I’m reading a 2MHz wide band from my SDR, where I tuned into 100.7 MHz. The following shows a part of the FM spectrum: The…
– clone from git git clone https://github.com/merbanan/rtl_433.git – install need cmake apt-get install cmake – install libusb apt-get install libusb-1.0-0-dev – start rtl_433 -a KlikAan KlikUit: *** signal_start = 251271090, signal_end = 251291121 signal_len = 20031, pulses = 1 Distance…