As early as 1977, HP commenced production of the HP856x spectrum analyzers to complement its RF electricity meters and sensors able to measuring signals in extra of twenty GHz. HP also produced configurable chassis based sweep generators effective at generating signals to twenty GHz. Other T&M solutions of time provided https://bookmarkstime.com/story18015417/the-%D8%A7%D9%86%D9%88%D8%A7%D8%B9-%D8%B3%D8%B1%D9%88%D8%B1-hp-diaries