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        10 Hints for
        Making Successful
        Noise Figure Measurements
        Application Note




Optimize Your Measurements and
   Minimize the Uncertainties
Table of Contents

Introduction................................................................................................ 3
HINT 1: Select the Appropriate Noise Source.................................... 4
HINT 2: Minimize Extraneous Signals ................................................. 5
HINT 3: Minimize Mismatch Uncertainties......................................... 6
HINT 4: Use Averaging to Minimize Display Jitter ............................ 7
HINT 5: Avoid Non-Linearities .............................................................. 8
HINT 6: Account for Mixer Characteristics ......................................... 9
HINT 7: Use Proper Measurement Correction ................................. 12
HINT 8: Choose the Optimal Measurement Bandwidth ................. 13
HINT 9: Account for Path Losses ....................................................... 14
HINT 10: Account for the Temperature of the Measurement
Components ............................................................................................. 15
Appendix A: Checklist ........................................................................... 16
Appendix B: Total Uncertainty Calculations ..................................... 17
Appendix C: Abbreviations ................................................................... 18
Appendix D: Glossary and Definitions ............................................... 18
Additional Resources ............................................................................. 19




  Find out more www.agilent.com/find/noisefigure




                                                                                    2
                    Introduction
  The checklist     Noise figure is often the key to characterizing a receiver and its ability to detect
 in Appendix A      weak incoming signals in the presence of self-generated noise. The process of
                    reducing noise figure begins with a solid understanding of the uncertainties in
is a helpful tool   your components, subsystems and test setups. Quantifying those unknowns

  to verify that    depends on flexible tools that provide accurate, reliable results.


  all hints have    Agilent's noise figure solution set 

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