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Hi Antonio,

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What software are you using for the Nano?? That can influence the calibration method.

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Since it is receive only, zero beating is the best solution that I know of.? Any known CW, AM, or FM source in the receive area can work.? Tune the radio to the signal source frequency (I use a known, accurate signal generator) and follow the general steps of:

1 - Adjust the BFO to receive the low-frequency audio tones by positioning the plateau to the left of the 300 to 3,000 Hz range

2 - Calibrate the Master frequency using the zero beat method

3 - Readjust the BO to center the audio plateau between 300 and 3,000 Hz.

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Here is a v6 video to do the calibration:

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The steps to turn on the BFO and Calibration functions in the Nano depend on the software you use.

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The BFO tuning page from HFSignals is no longer functional.? I use a PC based audio spectrum analyzer to set the BFO:

or

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73

Evan

AC9TU

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