As early as 1977, HP began creation of the HP856x spectrum analyzers to enhance its RF electricity meters and sensors able to measuring indicators in excess of 20 GHz. HP also manufactured configurable chassis dependent sweep generators capable of building indicators to twenty GHz. Other T&M items of the time https://bookmarkbooth.com/story17711609/everything-about-hp-%D8%AF%D8%B1-%D9%BE%D8%B2%D8%B4%DA%A9%DB%8C-%D9%85%D8%AE%D9%81%D9%81-%DA%86%DB%8C%D8%B3%D8%AA