Hi,
I am trying to use the PCI-6602 board to record photon arrival times of an APD. Already for countrates in the low kHz regime I get the error DAQmxBase Error -200141: Data was overwritten before it could be read by the system. I could reproduce the error with the attached vi (test2.vi), which produces a train of N pulses and measures them. If the spacing between the pulses is short (only a few ticks), the error occurs for N>2. That means two close events can be still distinguished, if there is an additional one, the acquisition stops with an error.
One way to circumvent this problem is to use a Timer as a low pass filter, but this discards also photons of a pair of two, which in theory can still be counted, and the signal is heavily distorted.
Do you have any ideas how to record the random events (photon arrival times, 100 - 500 kHz) with throwing away only as few events as possible?
For instance, can the program be told to completely ignore the errors, discard the overwritten events and finish acquireing the given number of events?
Maybe I can use two or three counters to solve the problem?
Thank you very much for your feedback,
Jonas Ries
