Yes, that looks correct. At 10kHz the cap has -75dB of voltage amplitude attenuation compared to a short. That's a very low transmission coefficient. I can see that you did not configure the display to connect the dots with lines, yet  Get yourself acquainted with the S11 and S21 scattering parameters and remember that they are RATIOS of voltage amplitudes (between the incident and transmitted or reflected signals). Ratios don't have units ! They are often confused with impedance and admittance of the DUT because they can be calculated from S11 and S21 measurements. https://www.analogictips.com/what-are-the-application-and-measurements-s-parameters/It is important to remember that Impedance and Admittance and VSWR are not measured by the VNA directly. They are only calculated from the S11 and S21 measurements. Most VNAs will do that calculation for you on-the-fly automatically when you request it. However, these calculations are subject to errors, so if you ask the VNA to "measure" the impedance or admittance of the DUT, the VNA will have to calculate them SOMEWHAT IMPRECISELY from the raw S11 and S21 measurements. If you're wondering what factors effect the precision of these calculations, then read the attached article and watch these videos: https://youtu.be/1UbEz73FGCUhttps://youtu.be/0JglLhrisOs The plot and schematics above are from a good article, which I am attaching to this message as a PDF file. P.S. Remember that the firmware for your VNA is updated often.
« Last Edit: 2020-07-25, 12:19:40 by verpies »
|
feature is available which provides a place all members can chat, either publicly or privately.
Author
Topic: Smudge proposed NMR experiment replication. (Read 105692 times)
