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A Sub-Sampling Digital PM/AM Noise Measurement System

Published

Author(s)

Craig W. Nelson, David A. Howe

Abstract

A digital phase/amplitude modulation (PM/AM) noise measurement system (DNMS) implementing field programmable gate array (FPGA) based digital down converters (DDCs), and 250 MHz analog to digital converters (ADCs) is reported. Performance in the first, baseband Nyquist region shows white phase noise floors of less than -180 dBc/Hz. With proper pre-filtering of the input signals to prevent undesired aliasing, high bandwidth track-and-hold amplifiers(THA) extend the operating range of the DNMS to microwave frequencies. Preliminary testing with an 18 GHz THA shows residual white phase noise floors at 10 GHz of less than -160 dBc/Hz.
Proceedings Title
Proceedings of the 2012 IEEE International Frequency Control Symposium
Conference Dates
May 22-24, 2012
Conference Location
Baltimore, MD
Conference Title
2012 IEEE International Frequency Control Symposium

Keywords

Decimation, digital measurement, DSP, FPGA, phase noise measurement

Citation

Nelson, C. and Howe, D. (2012), A Sub-Sampling Digital PM/AM Noise Measurement System, Proceedings of the 2012 IEEE International Frequency Control Symposium, Baltimore, MD (Accessed July 13, 2024)

Issues

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Created May 24, 2012, Updated February 19, 2017