Phase Correction with Asynchronous Digitizers

Standalone receivers are becoming more widespread and there is interest in 'wireless' receiver coils for a number of potential applications. In some instances these receivers must run without a direct connection to the spectrometer, using a separate clock, in which case there will generally be a random phase variation between the transmitter and receiver. This abstract examines two methods for proper phasing of the received signal in asynchronous receive: recovering the phase from the residual FID from the 180 pulse, prior to phase encoding, and injecting an RF pilot signal outside of the signal bandwidth through an additional probe.

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