A magnetic resonance spectrometer employing a pseudorandom binary sequence to simultaneously excite magnetic resonance of a plurality of resonance lines in the spectrum of a sample under analysis, the driving radio frequency field being applied to the sample in a train of pulses in each binary sequence, the timing or phase of the pulses being changed in a stochastic manner in the sequence, the composite noise excited resonance signal being detected in a receiver and sampled in a multitude of time displaced intervals in correlation with the binary sequence and stored in an accumulative manner in the associated channels of a memory of subsequent processing, read-out and display, the receiver being activated during the time intervals between the application of the radio frequency pulses to the sample.
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