SDR-4+ extending frequency coverage to 70.5 MHz in HDSDR

Chris Moulding

The default settings of the frequency control program used with HDSDR limit it to 40 MHz.

When you have HDSDR running with the receiver select the ExtIO button to the right of the Tune frequency display. This will open another program that is used to control the receiver frequency.
Select the Si570 tab. This will open a page showing some details of the Si570. At the top right is "Freq range". In the right hand window change the default setting to 300.
Click the "Hide" button.
Exit HDSDR to save the changes.
When you restart HDSDR you will be able to tune up to 70.5 MHz with the SDR-4+ receiver.


Chris, G4HYG

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