DocumentCode
2726172
Title
Direct IF sampling of HPA´s AM and PM noise
Author
Hoover, Lowell ; Crespo, William ; Mitsdarffer, K. Bryan
Author_Institution
Polyphase Microwave Inc., Bloomington, IN, USA
fYear
2010
fDate
13-16 Sept. 2010
Firstpage
1
Lastpage
2
Abstract
The development of a novel technique for measuring HPA (High Power Amplifiers) AM (Amplitude Modulation) and PM (Phase Modulation) noise is reported. The new method utilizes a dual channel microwave downconverter and a 16-bit high-speed digitizer to directly sample the IF allowing digital demodulation of AM and PM noise simultaneously. A prototype AM/PM noise measurement system has been built with a measurement single-sideband noise floor of -155 dBc/Hz at 100 kHz offset from the carrier.
Keywords
amplifiers; amplitude modulation; analogue-digital conversion; noise measurement; phase modulation; phase noise; signal sampling; 16-bit high-speed digitizer; AM noise; HPA; PM noise; amplitude modulation; digital demodulation; direct IF sampling; dual channel microwave downconverter; high power amplifiers; phase modulation; Cranes; Demodulation; Floors; Noise measurement; Phase noise; Prototypes;
fLanguage
English
Publisher
ieee
Conference_Titel
AUTOTESTCON, 2010 IEEE
Conference_Location
Orlando, FL
ISSN
1088-7725
Print_ISBN
978-1-4244-7960-3
Type
conf
DOI
10.1109/AUTEST.2010.5613621
Filename
5613621
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