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 * Press $$\fbox{MEAS} \Rightarrow\fbox{Refl: S11 FWD}$$
 * Press $$\fbox{CAL} \Rightarrow\fbox{CALIBRATE MENU} \Rightarrow \fbox{RESPONSE}$$. Since we are only doing a reflection measurement, we only need a single calibration.
 * At Port 1, connect the short, and press $$\fbox{SHORT}$$. It will be underlined when calibration is done: $$\fbox{\underline{SHORT}}$$. For the reflection Response calibration, you just need to do either a $$\fbox{SHORT}$$ or an $$\fbox{OPEN}$$, not both.
 * Press $$\fbox{DONE RESPONSE}$$ and the VNA will compute the correction coefficients.
 * Install a $$50\Omega$$ terminator. The $$\fbox{MEAS} \Rightarrow \fbox{LIN MAG}$$ plot should be reasonably flat, and the level should be $$50U$$ accross the whole frequency range.