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Direct Memory Access (DMA)

  The two fast backends use DMA techniques to transport the data from the instrument onto a computer where it can be formatted and written to disk. The DMA interface on the Spectral Processor can transfer data at up to 10 MB/Sec. The GBT Spectrometer has a VME64 interface that can transfer data at the full design rate of the machine, approximately 13 MB/Sec.

John Ford
Fri Mar 13 16:06:38 EST 1998