Preliminary results for a traceable amplitude modulation measurement technique using in-phase and quadrature referencing

Author

Humphreys, David A. ; Harper, Matthew R. ; Roberts, Paul

Author_Institution

Nat. Phys. Lab., Teddington

fYear

2007

fDate

4-8 June 2007

Firstpage

145

Lastpage

149

Abstract

We describe a new sampling-oscilloscope based technique to measure the AM and PM components of a modulated RF signal. The method uses in-phase and quadrature referencing to simultaneously demodulate the RF signal and correct the instrument timebase nonlinearities. Preliminary results show a dynamic range of > 80 dB and agreement of better than 1% with existing methods was achieved for a 100 MHz carrier signal amplitude modulated at 20 kHz with a 50% modulation depth.

Keywords

amplitude modulation; oscilloscopes; phase modulation; signal processing equipment; signal sampling; AM components; PM components; in-phase referencing; instrument timebase nonlinearities; modulated RF signal; quadrature referencing; sampling-oscilloscope based technique; traceable amplitude modulation measurement technique; Amplitude modulation; Distortion measurement; Frequency domain analysis; Frequency measurement; Frequency modulation; Instruments; Measurement techniques; Phase modulation; Radio frequency; Virtual colonoscopy;

fLanguage

English

Publisher

ieee

Conference_Titel

Waveform Diversity and Design Conference, 2007. International

Conference_Location

Pisa

Print_ISBN

978-1-4244-1276-1

Electronic_ISBN

978-1-4244-1276-1

Type

conf

DOI

10.1109/WDDC.2007.4339398

Filename

4339398