analogdevicesinc
phasor measurements
There are many times where you are interested in the difference between phase magnitude between two signals, and there is specialized instruments for that, known as a Phasor Analyzer. This is typically used in teaching power systems and power electronics circuits.
https://www.labvolt.com/solutions/2_electronics/98-9063-00_data_acquisition_and_control_interface
https://www.youtube.com/watch?v=6lSrt7Kp0lY
It is similar to the view that we already have for the nyquist plot, so hopefully we can re-use the widget from that.
The difference is the magnitude is just linear volts, not dB, and you are interested in showing Channel 1 and Channel 2, and measuring the difference between them. Channel 1 is always 0 degrees (as the base reference). I don't know if this is a completly separate instrument (I don't think so), handling it in the time domain view (similar to the X/Y plot) would be best (I think).
Right it is called a vector voltmeter as well. Power engineers use displays like this for relative phase between voltage and current to measure power factor in AC systems.
Doug
yes, many are used in RF measurements as well...
- 2-port transmission, magnitude and phase
- B/A and A/B, magnitude and phase
For example: it's an advanced option on the KeySight 2 port analyzer,
There is some interesting history in an Anritsu App Note
comment from faculty was would be nice to have magnitude in Volts RMS, Volts Peak, and dB (relative to reference).