As early as 1977, HP began manufacture of the HP856x spectrum analyzers to enhance its RF ability meters and sensors effective at measuring alerts in excess of 20 GHz. HP also made configurable chassis based sweep turbines effective at generating signals to twenty GHz. Other T&M goods of some time https://getsocialsource.com/story3001912/about-%D8%A7%D9%86%D9%88%D8%A7%D8%B9-%D8%B3%D8%B1%D9%88%D8%B1-hp