I am recording muscle signals from insects and want to count the "spike events" of a certain muscle unit, i.e. a certain voltage. Can I set a threshold - let's say 2V - so that SignalExpress counts once every time this "event" takes place? So that in the end I get a number of how often the RISING signal passed this threshold (no count when the signal falls down again under the threshold). And, one step further, is it possible to automatically calculate the counted number of "spikes" into a frequency (only for the period between the first and the last spike event, not necesserily the whole recording)?
I work with the NI 9215 USB and differential amplifiers. The recordings are done in the continuous differential mode.
I tried to solve your task with Signal Express alone and have to say it won't work. Signal express is good for acquisition but not very good for signal processing. You need either LabVIEW to build a VI or a module with counter input to accomplish this task.