在精心设计的高精度频率计正是措施输入频率被锁定为已知标准。在这CY8C27443微控制器为基础的项目，晶体振荡器是放置在一个温度控制的环境，以提高其精度。收到的用于衡量输入频率，

参考振荡器的频率来衡量的确切时间播出的公共广播电台。由此产生的米达到非常精确的频率测量。-Precision Frequency Meter



The well-designed Precision Frequency Meter precisely measures input frequency that is locked to a known standard. In this CY8C27443 microcontroller-based project, a crystal oscillator is placed in a temperature-controlled environment to enhance its precision. Before it’s used to measure the input frequency, the reference oscillator’s frequency is measured against the exact time broadcast on public radio. The resulting meter achieves extremely accurate frequency measurements.