As early as 1977, HP commenced manufacture of the HP856x spectrum analyzers to enrich its RF electricity meters and sensors able to measuring indicators in extra of 20 GHz. HP also produced configurable chassis based sweep turbines able to creating indicators to 20 GHz. Other T&M products of the time https://rotatesites.com/story18819622/%D8%B3%D8%B1%D9%88%D8%B1%D9%87%D8%A7%DB%8C-hp-fundamentals-explained