02-13-2010 04:57 AM
Dear All,
Iam using NI4472 for PCI card. In that i want only one data whenever i give the digital pulse in trigger input. This is possible?. If this is Possible then how to configure the setting to get the data from NI4472 card. Can Any one help me
Regards,
Vijay
02-13-2010 05:06 AM
02-13-2010 06:01 AM
Thanks for your reply,
In that first options How to configure the digital pulse in external clock? Any setting procedure is there? Can you give the details about first options.
Thanks in advance
Regards,
Vijay
02-13-2010 07:16 PM
Can you simply wire the digital pulse into an analog channel and then sample both the analog and the digital at say 100kSa/second. View these on an graph and you can then see the relationship.
You can use a peak detector on the digital pulse channel to find the index where it occurs and pull the analog value from the vibration channel out of the other array.
02-14-2010 10:02 PM
Thanks for your reply,
Now that is working, But problem is i need to use external trigger input to give digital pulse, not any one of analog input channel for digital pulse. Because i need to extra coding to detect the peak pulse values and extract the index values from analog input array. If EXT trigger input is used i can avoid extra coding and execution timing.For that can you give some details.
Thanks in advance,
Regards,
Vijay
02-15-2010 02:04 AM
Can you help me to solve this problem.
Regards,
Vasu
02-15-2010 09:31 AM
The digital input line is only a start trigger on the 4472. It will start the acquisition process, then it is free running.
Our Sound and Vibration measurement Suite has the functions for aligning your data to a reference clock, such as an encoder pulse from a rotating shaft. You can download an evaluation copy from our web page
You can then use the tacho and resampling functions to get data aligned with any number of points per reference.
The alternative is to work on the coding as I have suggested