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The dacqUSB system has an integral digital oscilloscope that obviates the need for an external oscilloscope, and so reduces the bulk (and cost) of the total system. The digital oscilloscope provides the interface for user control of settings such as filtering, gain, referencing and triggering.
Features include:
▪ Displays up to 10 channels simultaneously, in 10 horizontal divisions, with sweep rates from 500 ns to 2 sec per division (with peak-detect or averaging modes for slow sweep rates); recording channels can be assigned arbitrarily to oscilloscope channels to facilitate comparison between pairs or groups of signals; eight independent groups of 10 channels may be configured, accessed by a single keystroke or mouse click
▪ Referencing, gain and filtering independently adjustable (by mouse or keyboard) for each channel
▪ Signal amplitudes displayed in units of microvolts or millivolts according to gain setting
▪ Oscilloscope can be free-running, triggered or free-running with transient hold following a trigger (settable delay); the latter feature allows visual assessment of spike activity on individual channels while still monitoring ongoing activity across all channels, triggering either internally (from any of the displayed channels) or externally (e.g. from the stimulator or other digital input); positive- or negative-edge triggering; trigger point settable at 10% to 90% of display span
▪ Screen dumps for instantaneous signal capture
▪ Quadruple-resolution mode (instead of 10 channels, only four are displayed, the first of which is enlarged by a factor of four), to allow visualisation of fine signal details, e.g. for field potential recording
Click here to see a typical oscilloscope display.
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