any thing

I have to actually change the scan rate with changes in frequency....My scan 
rate is calculated as follows.

scan rate=40Mhz/16*fin
for example for an incoming frequency of 10 khz, my scan rate would be 250
If suppose the incoming frequency is changed, I want the scan rate to be 
changed automatically so that the frequency of the look up table is updated.

How should this be done.........Please help

I have a fpga, a pxi system and a daq.........My idea is to change the refresh rate 

I have to actually change therefresh rate with changes in input frequency frequency....My refresh
rate is calculated as follows.

scan rate=40Mhz/16*fin
for example for an incoming frequency of 10 khz, my scan rate would be 250
If suppose the incoming frequency is changed, I want the scan rate to be 
changed automatically so that the frequency of the look up table is updated.

Hi,

I am pretty new to labview..I need to change the frequency of my look up table in accordance with an analog input signal frequency....This can be done by changing my scan rate which is calculated as follows

scan rate=FPGA frequency(40 Mhz)/16*fin

I decided 2 possibilities to implement this...

1)I could simply measure the frequency of the incoming analog signal from the photo detector...

Please tell me how to measure this frequency on FPGA??

2)I could also measure the phases of the signals and thus update the frequency.

But I dont exactly know how to do this....

It would be really helpful if you can help me resolve this ASAP

Thank You