Data traces and event channels
Data traces
Dataview supports up to 128 data traces, i.e. 128 separate traces recorded by analogue-to-digital conversion or constructed and/or modified by the user using built-in commands. Each trace consists of successive samples at equalSome commercial acquisition systems can record different traces at different rates. In DataView, all traces are scaled up to the fastest common rate (lowest common multiple) using linear interpolation. time intervals, each of which can have any numeric value. The data traces have identification numbers 1 - 128.
Event channels
DataView files can also contain up to 999 event channels. If you use 26 or fewer of these, then they are identified by the letters a – z. If you use more than 26, then the numbers 1 – 999 are used.
Each event channels can contain any number of events. Events are digital elements that have an on-time and an off-time, but no amplitude value. The on-time of the event is the acquisition time of the first data sample within the event. The off-time is the acquisition time of the first data sample after the event (i.e. the half-open range). Each event channel may be associated with a parent data trace, in which case the events within it can access numerical information derived from the data. Each event may also carry context-specific information.
Events are generated in DataView either by automatic recognition of specific features within the data channels (e.g. spike detection), or by modifying other events, or manually by the user.
Events are saved with the data traces in the DataView native dtvw-dat file format, or as an additional header file for original acquisition files.