As early as 1977, HP started production of the HP856x spectrum analyzers to enrich its RF ability meters and sensors capable of measuring indicators in extra of 20 GHz. HP also produced configurable chassis based sweep turbines effective at creating indicators to twenty GHz. Other T&M products of the time https://socialrator.com/story7908342/the-5-second-trick-for-%D8%B3%D8%B1%D9%88%D8%B1%D9%87%D8%A7%DB%8C-hp