Creating a custom automated test system for RF signals up to 18 GHz usually requires costly instruments controlled from a PC. Computer-controlled test equipment once required racks of instruments connected to a control computer via GPIB. But GPIB has all but disappeared in new equipment and USB is quickly making test systems with laptop control readily available, that are affordable and that fit in a briefcase for field work. No longer do you need to have a customized rackmount system specially designed for you. You can build what you need with reusable USB RF building blocks. Telemakus is one of several companies now offering high-frequency measurement and signal generation functions through 18 GHz that take advantage of a laptop or personal computer (PC) for its processing and display capabilities, in flash-drive sized RF building blocks.
http://www.saelig.com/news/articles/telemakusarticle031616p.pdf
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