DocumentCode
2928188
Title
7.5: Direct IF sampling of TWT AM and PM noise
Author
Mitsdarffer, K. Bryan ; Crespo, William F. ; Hoover, Lowell R.
Author_Institution
Crane Div., Naval Surface Warfare Center, Crane, IN, USA
fYear
2010
fDate
18-20 May 2010
Firstpage
91
Lastpage
92
Abstract
The development of a novel technique for measuring TWT AM and PM 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
amplitude modulation; demodulation; microwave frequency convertors; noise measurement; phase noise; travelling wave tubes; IF sampling; TWT AM noise; TWT PM noise; digital demodulation; dual channel microwave downconverter; high-speed digitizer; measurement single-sideband noise floor; noise measurement system; Cranes; Demodulation; Detectors; Noise measurement; Optical noise; Phase measurement; Phase noise; Prototypes; Radio frequency; Sampling methods;
fLanguage
English
Publisher
ieee
Conference_Titel
Vacuum Electronics Conference (IVEC), 2010 IEEE International
Conference_Location
Monterey, CA
Print_ISBN
978-1-4244-7098-3
Type
conf
DOI
10.1109/IVELEC.2010.5503587
Filename
5503587
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