getting two intensity graphs from the aquisition of one signal conroled by a TTL

[imados_xp]

Hello , 
I'm a newby in Labview and i'm using 8.6 .
I want to aquire continuously voltage and control it by a TTL signal , in the first rising edge , I aquire many samples of the voltage and put it in the first row of the array and stop in the falling edge , and in the next rising edge , start the aquisition for the first row of the second array , and so on ..

we have to do this until to reach 256 rows of each array , and so draw the intensity graph of the two arrays . 
The TTL signal must be aquired using the PFIs and we have another TTL signal wich start in the begining of aquiring and wich stopped in the last row acuired .

ps : i need also to make an average of the aquired data in each row so that i get 256 or 512 values for each row of the array .

Thanks

[R_Duval]

Hello imados.

What is the issue which you met? Could you attach us your code please?

If you have no ideas how to begin your code I advice to have a look at Getting Started with labVIEW and at the NI examples.

Best Regards.