INSTALLATION:

1. Run HDSDR intaller
2. Accept the license agreement
3. Take note of the installation directory
4. When installer is finished, place ExtIO file in the installation directory


OPERATION:

1. Start HDSDR by double-clicking the desktop icon
2. Press 'ExtIO' and configure your NESDR settings. Ensure 'Direct Sampling' is 'Disabled'.  Recommended 'Sample Rate' is 2.4Msps
3. Either increase the gain slider or enable the AGCs with the checkboxes
4. For NESDR XTR, it is recommended to enable 'Offset Tuning' as well
5. Close the dialog box
6. Press the start button or F2