75 Ohm Measurements with a 50 Ohm VNA скачать в хорошем качестве

75 Ohm Measurements with a 50 Ohm VNA

In this video, Brian Walker from Copper Mountain Technologies demonstrates how to perform 75 ohm measurements using a 50 ohm VNA. He walks through the steps of calibrating the vector network analyzer (VNA) with a 75 ohm calibration kit, explaining how to use mechanical converters and L-pad matching to successfully measure a 75 ohm system despite the VNA's native 50 ohm setup. Brian also highlights the differences between 50 ohm and 75 ohm connectors, as well as the potential impact of using mechanical adapters versus L-pads for more accurate return loss and transmission measurements. Whether you're using N-connectors or F-connectors, this video is a great resource for anyone needing to convert 50 ohm measurements to 75 ohms for accurate system analysis. Brian provides insights into calibration methods, discussing the use of mechanical adapters and L-pad converters for achieving optimal results. He also compares the performance of 75 ohm cables with 50 ohm test cables, emphasizing the importance of understanding connector compatibility and frequency considerations in real-world applications. This video is perfect for professionals working with 75 ohm systems, helping them achieve precise results even with a 50 ohm VNA. 0:07 - Introduction 0:19 - Calibrating a vector network analyzer 1:11 - Why to use Unknown Thru instead of Known Thru in calibration 1:32 - Calibration kit information in VNA software 1:52 - Measurement setup explanation, showing the SC5090 2-port 9 GHz VNA: https://coppermountaintech.com/vna/sc... 2:01: Explaining methods for converting 50 Ohm VNA for making 75 Ohm measurements, mechanical conversion or L-pad matching 2:19 - Mechanical conversion 3:01 - Warning for 75 Ohm and 50 Ohm connectors - they are not the same size! 3:30 - Matching Pads conversion and explanation 4:26 - Demonstrating the difference between mechanical impedance adapters and using the matching pads 6:23 - Frequency considerations for 75 ohm measurements and connector types, N-type and F-type 7:58 - Demonstration using S2VNA software to do matching pad/L-pad conversion from 50 Ohm to 75 Ohm measurement for a filter measurement 9:40 - Comparing matching pad measurement conversion to mechanical adapter conversion