SDR radio / хващаш сигнал от монитор

RTL-SDR is a very cheap software defined radio that uses a DVB-T TV tuner dongle based on the RTL2832U chipset.
The most common today RTL-SDR dongle contains two primary chips: the Raphael Micro R820T radio tuner and than the Realtek RTL2832U which contains an 8-bit ADC and USB data pump.
During last year the R820T chip has been substituted by the R820T2 with a little better receiver performance.
I bought some R820T2 dongles and I needed a RF generator in the GHz range for comparison.
I investigated the possibility to modify a RTL2832U+R820T dongle to use it as a Radio Frequency Generator and hereafter the results.

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