Digitization rate

Digitization rate The rate that represents the number of analog-to-digital conversions per second during data acquisition must be twice the highest signal frequency. 

Note The digitization rate or sampling rate may be reported as dwell time per data point, e.g., 1 ns, or as sampling frequency, e.g., 1 GHz. 

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The alternative method for obtaining quadrature phase detection with the use of a single phase-sensitive detector, developed initially by Redfield38 and used in some commercial spectrometers, has certain advantages in two-dimensional NMR. In this approach, the phase of the receiver is advanced by 90° after each measurement. The rationale can be better understood after we discuss digitization rates in Section 3.7. 

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Now we show you a sketch of what is happening in the frequency domain. The rf carrier frequency is at which is chosen so that the entire spectrum of interest is bracketed between and v +Av or v -Av (but not both) where 2Av is the digitizing rate. In a single phase detection experiment the folding problem is avoided by deliberately locating the carrier frequency to one side of all spectral features and ignoring the other side of There are a couple of fairly... 

Finally, again consider the example by Pajer and Armitage on page 64. If the digitizing rate is set to 500 Hz, the result would be identical with the example of the 1 kHz digitizer working alternately on the two FID s in quadrature except... 

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