![vna smith chart vna smith chart](https://myriadrf.org/app/uploads/2017/12/smith.png)
After each termination is placed on the cables, press the respective soft key, remove the termination, and repeat the procedure until all of the calibrations have been made for both ports.
![vna smith chart vna smith chart](https://thumbs.dreamstime.com/z/calibration-kit-rf-vna-front-smith-chart-radio-frequency-vector-network-analyzer-164118727.jpg)
Proceed to connect each of the calibration terminations for open, short, and matched load for S11 (port 1) and S22 (port 2) as described in 4a part f above.Choose REFLECT’N soft key (on side of screen panel).Select CAL 1 (7 mm A.1) because you are using cables with 7mm connectors attached to the network analyzer.Do this by pressing MORE on the soft menu on the screen, then DELETE CAL SET, then choose a number. Delete a calibration set to make room for yours.Calibrate the network analyzer (Full 2-port calibration for Reflection and Transmission Measurements) PUT THE BOX of standards back in the closet.Ĥb. Factors that can affect your calibration: tightness of cables and connectors, between elements and to the network analyzer. IF these are not "clean", redo the calibration. For the load, the dot should be in the center. For the short, you should see a dot on the left side of the smith chart. You should see a small dot on the right side of the smith chart, but you will probably see a short line. The worst is usually the open, so put the open standard on again.
![vna smith chart vna smith chart](https://i.stack.imgur.com/XDBGG.png)
Press the number where you want to save the cal set. (PLEASE! These standards are little and expensive, and if they get lost, we don't have any others.) We are assuming our load is acccurate over the whole frequency range of calibration and is therefore "broadband." Replace the plastic cover, put all the standards back in the box. They are the long, sliding cylinders in the box. Press OPEN, wait until open is underlined, remove the open and replace the plastic cover. It is the same length as the short, but with a smaller radius and a hole in the end. Take it off, put the plastic cover back on the standard, and find the open. Connect the short, press the softkey SHORT, and when it is done measuring (quickly) it will underline the SHORT.