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The digital I/O board contains a dedicated DSP chip which forms the basis for a programmable stimulator in conjunction with an external stimulus isolator. It can produce either single pulses or complex, patterned stimuli (such as repeated bursts of tetanisation).
Features:
▪ Standard TTL-level (5 V) output usable with most stimulus isolators
▪ Unipolar or bipolar stimulation supported
▪ Can be used to trigger the dacq digital oscilloscope
▪ Stimulus pulse times may be recorded synchronously with single units, and may be used to evoke potentials in field potential recording
▪ A pattern can contain up to 4 levels of periodicity (groups, bursts, trains, and individual pulses)
▪ At each level of periodicity, the pattern at that level and “below” can be set to repeat infinitely (for example, continuous pulses at a programmed frequency, or continuous trains of pulses, etc.)
▪ Patterns can be chained to create any desired protocol (each pattern can be set to run for a fixed interval)
▪ Libraries of individual patterns, or protocols consisting of sets of patterns, can be stored to and loaded from disk, allowing easy reconfiguration for different experimental paradigms
▪ Stimulation start can be self-timed or externally driven (e.g. manually, or by other dacq signals)
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