02-26-2008 05:04 AM
02-26-2008 07:30 AM
You can use VISA, to read-write to a serial port. Search the Labview examples.
Labview has many mathematical functions too. Be more specific if you have a problem
02-26-2008 07:38 AM
02-26-2008 07:41 AM
Start by a high level design of what you want to do. Describe it in simple terms. That will help you define which blocks you need to accopmplish it. Then look for examples that fullfill those items.
Example:
1. Acquire signal
a) Open serial port
b) Send command
c) Query port for data
d) If data is available, read it
e) Pass data to the next block
f) Determine if data reception is continuous to decide if loop is more appropriate. And potentially have the ability of transmitting the data to another block while receiving the data. Or data is obtained in a single shot beofre passing it for analysis / processing.
2. FFT on signal
a) Obtain data
b) Carry out FFT
c) Display / store results
In the example I described above, you should be able to find code examples for both by doing a search on Serial Communication and FFT. The examples will probably not interface readily to aone another, but may require a small modification. You could establish that as your starting point. If you are beginning to program using Labview, it would be wise to review proper coding methods (do a search).
RayR
02-26-2008 07:45 AM
Thanks Joe
Seems very helpful. I will have a look
02-26-2008 08:36 AM
02-26-2008 11:02 AM
Thanks Dennis
Manufacturer is Tektronix(oscilloscope mode: TDS430A).
There is no driver for this
02-26-2008 11:06 AM
02-29-2008 06:20 AM
Hi
I need to sample to analog signals
1. For example, lets the say the signals are sine and cos waveforms
2. lets consider each sampling point as theta1,theta2........, from that we can find theta,ie.. Theta=tan inverse(sin theta/cos theta)
3. After that i can plot theta with time, so for this signal i need to do FFT.
Pls help me how to sample the signals and proceed further.
02-29-2008 08:39 AM