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Traceable amplitude modulation measurement using in-phase and quadrature referencing.

Humphreys, D A; Harper, M*; Roberts, P* (2007) Traceable amplitude modulation measurement using in-phase and quadrature referencing. In: International Waveform Diversity & Design Conference, 4-8 June 2007, Pisa, Italy.

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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.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Keywords: AM oscilloscope, RF modulation
Subjects: Electromagnetics
Electromagnetics > Wireless Communications
Last Modified: 02 Feb 2018 13:15
URI: http://eprintspublications.npl.co.uk/id/eprint/3899

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