Measure phase shift between two sinusoids

[dbanner]

https://m.youtube.com/watch?v=L78tdU9wPVc
Maybe a way to help tune self made coil for proper phase relationship between TX and RX. Or check phase shift of factory made coil.

[Qiaozhi]

If you have a dual-channel scope, you only need to display the TX on channel 1, and RX on channel 2. Then measure the delay between the zero-crossings.
For example, let's say the TX frequency is 10kHz, which means the period is 100us. If the delay measures as 5.6us, then you have 5.6/100 = 0.056. Multiply this number by 360 to get the delay in degrees. In this case it's 20 degrees.
If you're building your own coil, then you simply need to adjust the coils so that the RX delay is 5.6us.

[dbanner]

Thanks, just exploring alternative ways that present the phase shift numerically. Also, in Visual Analyzer(VA) software, if you click on the box marked D/A, in oscilloscope settings, 14khz sine becomes smooth and nice. The explanation is in the help file. Something about Nyquist theorem and wave Reconstruction.
Because of the limitations of the soundcard, sine waves from TGSL TX appear jagged, but click on box D/A now appear smooth. Don't know if it's true representation or not, but it looks great.