{"product_id":"used-hp-agilent-5071a-primary-frequency-standard","title":"Used HP\/Agilent 5071A Primary Frequency Standard","description":"\u003cp\u003eThe 5071A uses a fundamental property of the element cesium to define frequency.\u003cbr\u003eInside the cesium beam tube assembly, an applied microwave signal causes\u003cbr\u003eenergy-level transitions to occur in the cesium atoms. The microwave signal is synthesized from a 10 MHz voltage-controlled crystal oscillator (VCXO). Patented Cesium II\u003cbr\u003ecircuit and software technology detects departures of the microwave frequency from\u003cbr\u003ethe cesium energy-level transition frequency and corrects them by tuning the VCXO to\u003cbr\u003erun precisely at the proper rational-fraction of the cesium frequency. The microprocessor (an integral part of this servo loop) performs the error determination and correction\u003cbr\u003eseveral times a second to ensure that the VCXO is always closely locked to the\u003cbr\u003ecesium-transition frequency.\u003cbr\u003eMany functions within the 5071A are under Cesium II software control. The software\u003cbr\u003emanages the initial warm-up and alignment, then continuously monitors the appropriate signals using this information to control all key operating parameters for optimum\u003cbr\u003eperformance. Starting the 5071A merely requires connecting AC or DC power.\u003cbr\u003eAfter a typical warm-up time of 15 minutes, the standard is fully operational and the\u003cbr\u003eoperator may optionally press three keys to display a continuous operation signal.\u003cbr\u003eThere are no maintenance procedures or adjustments needed even when necessary\u003cbr\u003eto replace the cesium beam tube. The 5071A\u003c\/p\u003e","brand":"TSD Electronic Store","offers":[{"title":"Default Title","offer_id":53259934662999,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/9389\/0135\/files\/HP5071A.jpg?v=1775534764","url":"https:\/\/www.tsdwelltest.com\/products\/used-hp-agilent-5071a-primary-frequency-standard","provider":"TSD Welltest Solution","version":"1.0","type":"link"}