BackgroundElectronic quartz crystals (,)are used as frequency determining elements, usually in anoscillator, but also in filters. In both cases it'simportant to have good characterization data for the designprocess. Because of their high Q special test equipment is needed to characterize quartzcrystals. The goal is to have good values for the.Crystal control of radios became a major project in W.W. II(Video: 41:28 - note lack of safetyprecautions).
Design of a Portable Low-Cost Impedance Analyzer Abdulwadood Al-Ali 1, Ahmad Elwakil 2, Abdelaziz Ahmad 2 and Brent Maundy 1. The clock that drives the AD5933 has to be changed for each range of frequencies. We control the master clock (MCLK ) using an external programmable oscilla-tor which lowered the limit of the frequency to 5 Hz. But the nature of the issue suggests, a fully tunable clock would be the best. Therefore a variable clock generator for the AD5933 is used. Clock source AD9834 for AD5933. The AD9834 (Analog Devices, 2014) is a DDS integrated circuit. It itself needs an external reference clock, which is realized as a 50 MHz quartz oscillator.