摘要
跟踪预选是目前宽频带超外差扫频频谱分析仪普遍采用的假响应抑制方法。传统模拟技术的宽频带跟踪预选器调谐驱动电路设计复杂、稳定性差。在VXI总线微波频谱分析仪模块项目中应用可编程逻辑器件与DAC结合实现了跟踪预选器的数字化调谐驱动,性能优异。本文介绍其实现原理及设计方法。
Tracking preselector is commonly used in the broadband, swept-tuned, superheterodyne spectrum analyzers, to reject spurious responses. The tuning circuit for broadband tracking preselector is complex and unstable which designed by analog techniques. The digital turning circuit for tracking preselector is realized by programmable logic device （PLD） and DAC. And it is applied in VXI bus microwave spectrum analyzer module with excellent performance. This paper introduces its realizing theory and design method.
出处
《中国仪器仪表》
2008年第11期34-37,共4页
China Instrumentation
关键词
跟踪预选
调谐
可编程逻辑器件
数字化
Tracking preselection Turning Programmable logic device （PLD） Digital
