World’s cheapest INMARSAT reception systen using DVB-T USB dongle (RTL SDR)

World's cheapest INMARSAT reception systen using DVB-T USB dongle (RTL SDR)DVB-T dongles based on the Realtek RTL2832U can be used as a cheap SDR, since the chip allows transferring the raw I/Q samples with up to 3MHz bandwith to the host. I am testing here a DVB-T USB dongle based on Elonics E4000 tuner chip covering around 60-1700MHz (same tuner chip as used in the famous Funcube dongle SDR). For this quick test I am using only a temporary 45cm dish (old unused TV “Camping equipment” dish) and a wideband PCB based Log-Periodic Antenna as a dish-feed. I am loosing some signal due to the linear polarization (-3dB) of the feed whilst the sat is transmitting circular polarization and some losses due to a couple of adapters between Antenna and DVB-T stick. SNR on FFT is around 15-16dB for Inmarsat with this tiny antenna….which I find quite impressive. You really g Source

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