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From Friday, April 19th (11:00 PM CDT) through Saturday, April 20th (2:00 PM CDT), 2024, ni.com will undergo system upgrades that may result in temporary service interruption.
We appreciate your patience as we improve our online experience.
02-10-2008 11:40 PM
Thank for your help
I 'll show show where it differnt on "Different.jpg".
And the other question, why I get digital signal only p0.0. I didn't the other port.
Thanks
02-11-2008 08:45 AM
02-11-2008 10:34 PM
02-12-2008 08:21 AM
02-14-2008 08:50 AM
02-28-2008 11:00 AM
02-28-2008 09:06 PM
05-08-2012 02:28 AM
Hello Everyone
I used Mr Michael's code to implement SPWM in LabView. I sent the output to the digital channel of ELVIS II kit. At low frequencies upto 10 Hz, my code outputs proper values. However as I increase the frequency, the output waveshape is correct but the frequency is wrong. While the output should occur at 2000 Hz, the scope shows a reading of 15 or 16 Hz. Please help me troubleshoot. I am attaching the corresponding vi.
05-09-2012 02:07 PM
Hi sadhoobagh,
I think I'm going to ned a little more information on your precise set-up. What troubleshooting steps have you tried so far? Is it the ELVIS II+ oscilloscope that you are viewing the signal on? How do you know that for low frequencies the code is giving the correct values?
Regards,
05-10-2012 04:33 AM
Hi James
I have made different codes for removing the problem of low frequency but every program outputs only low frequency. I am attaching one more code which has the same problem. The ELVIS oscilloscope was ON during the whole duration. When I dumped the output on the Analog channel of ELVIS, the output was of correct magnitude and proper frequency. However since I require atleast 8 output signals and ELVIS has 2 analog channels hence I need to output at the digital channel only. Till 10Hz the output signal frequency matches the expected value and the same is obtained on the scope.