The summary of things is: 1 - Discone input 5 is not counting ... its LAB chip does see a signal, so it is something wrong with the trigger input; could be just a cable. 2 - There is a funny '10000' counts thing happening ... look at discone 2, for example, and tell me how I can see a plateau at 10000 (that's +/- 1 or 2 counts only!) for low thresholds. I think that this 10000 number must be an overflow, but not sure. 3 - I see that, roughly 1-2% of the time, the readout cycle for one threshold setting returns all '0' and that about the same number of times the readout returns 2 bytes less than a complete record. The two effects are not correlated with each other. I think that this error rate is rather high, but I don't know if it might be just a result of how the threshold scan is done. Also, I was thinking that it might be useful to have some clock counter as a scaler so that one can normalize to time more properly than just guessing that the data was taken over 1 second. Anyway, I hope that there is something useful here ... I have not yet played with turning on the clock but will try today now that I have a clear idea of how to do it. Brendan