As early as 1977, HP commenced manufacture of the HP856x spectrum analyzers to complement its RF electricity meters and sensors capable of measuring signals in excess of twenty GHz. HP also developed configurable chassis based sweep generators effective at building alerts to twenty GHz. Other T&M merchandise of some time https://dailybookmarkhit.com/story17741662/not-known-details-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