Open AccessCalibration of NMR Receiver using Spectrometer Characteristics
Author(s) -
Peter Andris,
T. Dermek,
Ivan Frollo
Publication year - 2021
Publication title -
measurement science review
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.301
H-Index - 27
ISSN - 1335-8871
DOI - 10.2478/msr-2021-0028
Subject(s) - attenuator (electronics) , signal (programming language) , signal generator , calibration , electronic engineering , noise (video) , computer science , spectrometer , harmonic , generator (circuit theory) , analog signal , digital signal processing , physics , engineering , telecommunications , acoustics , optics , power (physics) , chip , quantum mechanics , artificial intelligence , attenuation , image (mathematics) , programming language
This article describes the measurement of the relation between input and output signals using two techniques: with a signal generator and with the thermal noise of a known resistance. Each of the techniques has its advantages and disadvantages. Both methods are tested and the results are compared. The input signal of the receiver is known in volts, while the output signal is in ADC (analogue-to-digital converter) units. It is the main difference versus the gain. Knowledge of the relation enables recalculation of the output signal into the input of the receiver or vice versa. It is important in some experiments. The method with the harmonic signal requires a suitable NMR spectroscopic console, generator of the harmonic signal and an attenuator, the method with the noise requires only the NMR console. It indicates that both methods are simple and cheap. The measured data are processed on a standard PC using common programs.