Method and device for compensating undesirable side bands in nuc

Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system

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324309, G01R 3320

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active

051912872

ABSTRACT:
The present invention relates to a method and a device for compensating undesirable side bands in nuclear magnetic resonance spectrometers. The frequency (.omega..sub.m) and the phase of rotation of the sample (10) are detected by means of a light sensor (12) and supplied to a compensation generator (18). The latter generates modulation signals (44 and 43) for modulating the amplitude and the phase of the detected nuclear magnetic signal of the sample, using an amplitude modulator (13) and a phase modulator (14), the modulation frequency being equal to an integral multiple, including the simple value, of the frequency of rotation (.omega..sub.m) of the sample. The additional frequency components heterodyne with the side bands provoked by the rotation of the sample (10) in the static magnetic field (B.sub.O), whereby the said side bands are eliminated.

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Journal of Magnetic Resonance 80, Gareth A. Morris, pp. 547 to 552 (1988).
Journal of Magnetic Resonance, Ogura Bd 83 Nr 1 Jun. 1989.
Journal of Magnetic Resonance Morris Bd 80, 1988.

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