As early as 1977, HP commenced creation of the HP856x spectrum analyzers to enhance its RF electricity meters and sensors able to measuring signals in excess of 20 GHz. HP also generated configurable chassis dependent sweep generators effective at building indicators to 20 GHz. Other T&M goods of the time https://social40.com/story3057809/a-review-of-%D9%85%D8%B9%D8%B1%D9%81%DB%8C-%D8%B3%D8%B1%D9%88%D8%B1-%D9%87%D8%A7%DB%8C-hp