Re: SDR4+ Not Tuning Reliably

Chris Moulding

It's probably not a driver problem as such. If the driver isn't working then you would be fixed on the receiver default frequency (7.050 MHz as new) at startup and it wouldn't change frequency at all.

The USB driver and firmware in the SDR-4+ use the libusb library to communicate. If you have another USB accessory plugged in to the computer that uses the libusb library it's possible that there may be an occasional clash or timing problem where commands to the SDR-4+ go missing. HDSDR just gives a single frequency change command without checking that it's happened.

If that's the case try removing the USB connected items until you have 100% control of the SDR-4+.


Chris G4HYG

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