This video presents the basic definition of a vector network analyzer (VNA), a practical view of how some of the measurements are performed, and an introduction to some of the common measurements that are made.
A few examples VNAs are shown.
Knowledge of transmission lines, reflections, VSWR, etc. is helpful, but not required for this video.
Alan, W2AEW, continues his series on using VNAs, and specifically the NanoVNA.
Why a VNA needs to be calibrated | how to calibrate a nanoVNA
This video describes why a "user" calibration is needed when using a VNA (vector network analyzer), what systematic errors it corrects for, what is meant by a measurement plane or calibration plane, and finally an example of how the calibration is performed on a nanoVNA.
How to use the NanoVNA to sweep / measure an antenna system's SWR and optimize its tuning
This video briefly shows how to setup and use the NanoVNA to sweep an antenna system (antenna, transmission line, transmatch, etc.) to measure its VSWR, Reflection Coefficient, etc., and then shows how you can use it to monitor the tuning behavior as you make adjustments. The basic steps include:
- Setting the traces that you want to display (SWR, Smith, S11)
- Setting the frequency range
- Running a Calibration
- Making the sweep
- Using Markers
Use NanoVNA to measure coax length - BONUS Transmission Lines and Smith Charts, SWR and more
TWO Part video: Part 1 shows how to use the Transform function in the NanoVNA to measure coax length or distance to fault. Part 2 (starting at about 4:40) digs a bit deeper into the effects of a transmission line on the observed impedance and SWR, how this is represented on the Smith Chart, and some of the "magic" of quarter-wavelength long lines.
