counting edges from a photon counting pmt

[chemfisher]

Hi, 

I am trying to use my DAQ (PCI 6115) to count photon signals from a photon counting PMT. 

What I have set up currently is 

1. creating a gate pulse with a width of integration time with counter 1 on DAQ 

2. creating a sencond counter to count the number of edges from the PMT within the given amount of time from #1. 

as I change integration time the width of the gate pulse should change therfore giving me more or less counts from my PMT, but this does not seem to be working correctly. Is there a better way to do this with my daq or am I performing something wrong? 

Thanks for any help. 

[chemfisher]

Here is the code that I've been testing. everything works in the code except when the integration time is changed the number of photon counts recieved does not change. 

[jmoody]

Hi there,

Your code crashes everytime I try to open it for some reason, could you post a screenshot of your block diagram?

[photonio]

Hello there,

I ve been trying to do something similar using an APD instead with no luck so far.

Would you mind sharing any code if you have succesfully accomplished your task?

Thanks