As early as 1977, HP started production of the HP856x spectrum analyzers to complement its RF energy meters and sensors effective at measuring alerts in surplus of 20 GHz. HP also produced configurable chassis dependent sweep generators capable of generating indicators to twenty GHz. Other T&M solutions of the time https://bookmarkextent.com/story19240440/the-%D8%A7%D9%86%D9%88%D8%A7%D8%B9-%D8%B3%D8%B1%D9%88%D8%B1-hp-diaries