As early as 1977, HP began production of the HP856x spectrum analyzers to enrich its RF power meters and sensors capable of measuring alerts in surplus of 20 GHz. HP also made configurable chassis centered sweep turbines effective at creating signals to twenty GHz. Other T&M merchandise of the time https://bookmarkstime.com/story18024617/about-%D8%A7%D9%86%D9%88%D8%A7%D8%B9-%D8%B3%D8%B1%D9%88%D8%B1-hp