1. FLDIGI Soundcard Calibration
Wwv mode
George Blakeslee N1GB

2. Launch FLdigi

3. Select the WWV modem - Op Mode > WWV

4. Select the Digiscope - View > Floating Scope

5. Open Configure > Audio

6. Choose Devices tab Check Port Audio
Select Input & Output soundcards drop down menu

7. Choose Settings tab Set Sample Rate: Input & Output to Native
Set Converter: Best Sync interpolator
Will be adjusting the "Rx corr Rate" while
observing the slope of the time tick line.

8. Tune in WWV or WWVH 2.5, 5.0, 10.0 or 15.0 MHz

9. Observe slope of line
POSITIVE
NEGATIVE

10. If positive - ADD NEGATIVE value in RX ppm

11. If negative - ADD POSITIVE value in RX ppm

12. Repeat until Time Tick is vertical along guide line

13. Left-click on Time Tick line in Digiscope to center it

14. Right-click in Digiscope window to zoom 5X