 Hello, welcome to this short video concerning vector network analyzer calibration. The reason for VNA calibration is to define the measuring planes. The measurement result then doesn't include test cables. Their influence is excluded. Usually we calibrate two ports to get all as parameters. In this example we will use single port calibration so we can only measure S11 the return loss at the port 1. So let's take a look. We press the analyzer with the press it button so we set the instrument to the default settings. Then we will configure the channel settings for our bluetooth application. Set the start frequency to 2 GHz and the stop frequency to 3 GHz. To get a finer plot, set the number of sweep points to 1000 using the sweep button. Then use the power average button to reduce the test power to minus 10 dBm. The measurement channel is now set. We can start calibrating. To start the calibration press call, start call and select only one port in this case port P1 and reflection OSM. The abbreviation means open, short and match standard. Choose the right type of connector. We have a 3.5 mm type SMA and a calibration set. We will use Rode Schwartz Z135. The measurement standard window contains instructions on how to perform the calibration. Click the standard open and screw it to the test cable connected to port 1. Tighten the thread to the correct torque with a wrench. Click on the appropriate button of the type of standard, VNA will perform the calibration measurement. Then this procedure is repeated for the short standard and for the match standard. Click apply. The press selected graphic type is displayed. Then now we change the S parameter from S21 plot to S11. In this case it's magnitude representation. We can format this plot into a Smith chart. We can now verify the calibration by connecting the reference standards to the VNA port. After connecting the open or short standard we can observe a circle line around the parameter of the Smith chart or in a magnitude representation as a line with a zero value. Connecting of match to load we can see just the point in the middle of the Smith chart or the measurement under the value at least minus 30 dB or better in magnitude plot. Worse value means that calibration wasn't well performed or the any calibration standard is 40 dB. Now we are prepared for the duty measurement. Thanks for watching, bye.