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I want to use a rtl-sdr as a simple frequency scanner, by setting a RX frequency, reading a block of IQ stream, then switching to the next frequency and so on. How do I sync the frequency set to the incoming buffer? i.e. how do I know what frequency span the read buffer corresponds to, considering t...

Is there somewhere on the net a technical description on how the R820T/RTL2832 sets its tuning frequency (i.e. from librtlsdr library calls) I am using a NooElec dongle with 1ppm crystal accuracy, but need tuning accuracy to a few Hz. At present I am achieving this by multiplying the IQ data from th...