Fig. 2.
Comparison of a standard FT-EPR system to a system driven by a pulse train modulated with a pseudorandom sequence. (a) A RF pulse, x(t) is input into the system and the FID output, h(t), is observed. (b) A RF pulse, x(t) is convolved with a pseudorandom sequence, s(t), producing a sequence of modulated RF pulses, p(t). After correlating the output, v(t), with s(t), the FID output, h(t), is effectively observed.