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Cross correlation techniques applied to the measurement of PM and AM noise in pulsed amplifiers

By: Walls, F.L.; Nelson, C.W.; Nava, J.F.G.;

2000 / IEEE / 0-7803-5838-4

Description

This item was taken from the IEEE Conference ' Cross correlation techniques applied to the measurement of PM and AM noise in pulsed amplifiers ' 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.