 Hello! Welcome to this short video measurement of the PCB antenna input written loss on Vector Network Analyzer. Prepare the measured PCB antenna using a cable with one connector. The antenna usually doesn't have any RF connector because it is connected directly to the RF line. This cable must be soldered with its open end directly to the input port of the antenna. The open end of the cable should be as short as possible and its shielding should be grounded as close as possible to the end of the cable so that the cable doesn't affect the measurement result. But leave the center wire unsoldered for calibration. We assume the VNA is calibrated with standards. If not, do it first. Then connect the measuring cable to single connector ended cable and use wrench to make sure of tightening right. Press offset embed button. Choose the proper port and click on outer length. Now disconnect the measuring cable from the single connector ended cable and solder the middle conductor to the antenna input. Then connect the measuring cable to the antenna again. Set the markers at the plot for reading out the impedance for certain frequencies. We usually set the markers to outer frequencies of the Bluetooth band and in the middle. Press the marker button, select markers and press mark 1. Set the frequency point at 2.4 GHz. Set the marker to 2.45 GHz and marker 3 to 2.5 GHz. You can switch between magnitude of written loss representation to the Smith chart display by rollout menu and button format. Okay, that's all for now. Thank you for watching. Bye.