Agilent的 频谱分析基础知识

yhyang

Contents
Chapter 1
Introduction ............................................................................3
What is a spectrum? ...................................................................3
Why measure spectra? ................................................................4
Chapter 2
The superheterodyne spectrum analyzer...............................6
Tuning equation...........................................................................8
Resolution ........................................................................................11
Analog filters................................................................................11
Digital filters ................................................................................13
Residual FM..................................................................................14
Phase noise ...................................................................................14
Sweep time .......................................................................................15
Analog resolution filters.............................................................15
Digital resolution filters .............................................................16
Envelope detector........................................................................17
Display smoothing ..........................................................................18
Video filtering...............................................................................18
Video averaging............................................................................20
Amplitude measurements .............................................................21
CRT displays.................................................................................21
Digital displays.............................................................................22
Amplitude accuracy........................................................................25
Relative uncertainty....................................................................25
Absolute accuracy .......................................................................26
Improving overall uncertainty...................................................26
Sensitivity .....................................................................................27
Noise figure...................................................................................29
Preamplifiers ................................................................................30
Noise as a signal ..........................................................................33
Preamplifier for noise measurements......................................35
Dynamic range.................................................................................36
Definition ......................................................................................36
Dynamic range versus internal distortion ..............................36
Attenuator test.............................................................................39
Noise ..............................................................................................39
Dynamic range versus measurement uncertainty..................40
Mixer compression ......................................................................41
Display range and measurement range....................................42
Frequency measurements ..........................................................42
Summary...........................................................................................43
Chapter 3
Extending the frequency range ..............................................44
Harmonic mixing .........................................................................44
Amplitude calibration .................................................................47
Phase noise ...................................................................................48
Signal identification ....................................................................48
Preselection ..................................................................................50
Improved dynamic range............................................................51
Multiband tuning .........................................................................52
Pluses and minuses of preselection..........................................53
Wideband fundamental mixing .................................................53
Summary...........................................................................................55
Glossary of terms....................................................................56
Index ........................................................................................63
【文件名】:0614@52RD_Spectrum_Basic.pdf
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ADS2005A

操，你怎么不传120页的那份呐。垃圾