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Data collection in dacq occurs in one of three modes, single unit (optimised for collecting neuronal spikes), raw dump, or position-only.
Single unit mode
Data is collected from channels in groups of 4 (each group a presumed tetrode), 2 (stereotrodes), or 1 (single electrodes). When the signal on any of the channels in an active group exceeds a user-determined threshold, the signal on all of the channels in the group is collected for the 200 µs preceding and 800 µs following the trigger event. Single-unit collection can be integrated with positional data from the video tracker, and digital inputs from experimental apparatus-derived signals.
▪ Optional artefact rejection, based on a simple spike waveform template
▪ Displays spikes or position data during collection, as well as up to two EEG (or other low-frequency analogue) signals
▪ Unit data is sampled at 48 kHz, EEG at 250 and/or 4800 Hz
▪ Recording may be started or stopped by digital input signals, or by a remote control input generated by a keyring transmitter.
Raw dump
At a user-selected sampling rate, all collected data samples are stored to disk. No spike separation is done, etc. This allows arbitrary off-line analysis of electrophysiological activity. Position data may also be stored synchronously with the electrophysiological signals.
Position-only
For behavioural experiments, it is possible to record only position data derived from one of our video trackers.
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