Title :
Cross correlation techniques applied to the measurement of PM and AM noise in pulsed amplifiers
Author :
Nava, Jose Francisco Garcia ; Nelson, Craig W. ; Walls, F.L.
Author_Institution :
Spectradynamics Inc., St. Louisville, CO, USA
Abstract :
This paper describes a very fast, automated two-channel cross-correlation based system for measuring phase noise and amplitude noise in pulsed amplifiers. The system uses in-situ calibration to achieve an uncertainty of less than 1 dB for a 10% duty cycle. A typical single-sideband (SSB) noise floor at X-band is -158 dB below the carrier in a 1 Hz bandwidth (-158 dBc/Hz) for a 10% duty cycle and a measurement time of 30 s. The SSB noise floor for a 2% duty cycle is approximately -148 dBc/Hz
Keywords :
amplitude modulation; calibration; correlation methods; measurement uncertainty; microwave amplifiers; microwave measurement; millimetre wave amplifiers; millimetre wave measurement; phase noise; pulse amplifiers; 1 Hz; 30 s; AM noise; PM noise; X-band; cross correlation techniques; in-situ calibration; measurement time; pulsed amplifiers; single-sideband noise floor; uncertainty; Amplitude modulation; Bandwidth; Calibration; Noise level; Noise measurement; Phase measurement; Phase noise; Pulse amplifiers; Pulse measurements; Time measurement;
Conference_Titel :
Frequency Control Symposium and Exhibition, 2000. Proceedings of the 2000 IEEE/EIA International
Conference_Location :
Kansas City, MO
Print_ISBN :
0-7803-5838-4
DOI :
10.1109/FREQ.2000.887408
