张颢教授系列讲座-Fundamental of Spectrum Monitoring1

1、Dr. Hao ZhangDepartment of Electronics EngineeringTsinghua University2n These slides is adapted from some product material of Spectrum Analyzers of Agilent and Rhode&Schwarz. All the contributors of original stuff are acknowledged.Background on the Course3n One of Mini-Courses Presented in Gradu

2、ate School in ShenZhen, Tsinghua Universityn Relatively Shortn 3 lecturesn 2 to 3 hours eachn Introductory in Scopen Parts of Basic Concepts of Spectrum Monitoringn Minimal Mathematical Formalismn Prerequisite A College Degreen Preferred in Engineering or Science, but not RequiredOutlinen What is Sp

3、ectrum Analysis?n The basics of Signal in Frequency Domainn Spectrum AnalyzerArchitectureheterodynesIF & RBWDetector4What is Spectrum Analysis5Type of Input Observation6Frequency vs. Time7Periodic Signal and Its Spectrum8Non-periodic Signal and Its Spectrum 9Architecture of Common Spectrum Analy

4、zers10Principle of heterodynes11Sweep by Adjust Intermediate Frequency12Low Intermediate FrequencyHigh Intermediate Frequency14Multi-Stage Mixing15Separated Pass for Low and High Frequency(Agilent)16Separated Pass for Low and High Frequency(Rhode & Schwarz)17Resolution Bandwidth (Analog)18Resolu

5、tion Bandwidth (Digital)Sampling19Resolution Bandwidth (Digital)Antialiasing and Windows20Resolution Bandwidth (Digital)Windows21| )(|jeXResolution Bandwidth (Digital)Shape of Windows22Resolution Bandwidth (Digital)Number of Points2364L54L42L32LResolution Bandwidth (Digital)Number of Points24Resolut

6、ion Bandwidth (Digital)Zero25Digital Intermediate Frequency(Analog-Digital Mixing)26Digital Intermediate Frequency(All Digital)27Digital Intermediate Frequency(Output)28Detector (Envelope Demodulation)29Detector (Envelope Demodulation)30Detector (Envelope Demodulation)31Detector (Video Filtering)32Detector (Types)33Detector (Types)34Detector (Sample vs. Peak)35Detector (Sampl