Feature not supported?

[leodp]

Hi,

I have a NI PXI-1045 and trying to synchronize 5421 and 5122 modules. To learn how to do it, I am first trying to follow some examples.
When I run the example programs on NI Example Finder, under Timing and Synchronization->Time-based
no matter which one I always get the error message:
This operation requires a feature that is not supported.

The complete error message for, say  Time Stamp Trigger.vi , is:
Error -1074118653 occurred at niSync Enable Time Stamp Trigger.vi
Possible reason(s):
Driver Status:  (Hex 0xBFFA4003) This operation requires a feature that is not supported.

Obviously I have a 6652 Timing Module, Labview 8.5, NI Sync (Programs->National Instruments) and a lot of other stuff in that folder, everything as originally installed by NI itself.

What is the meaning of that error? Shouldn't I be able to run such vi's?

Thanks leodp.

[Jan_Kniewasser]

Hello leodp,

for a fast response I will send you some informations about this issue in form of a Knowledge Base. Please check the points involved in that description. http://forums.ni.com/ni/board/message?board.id=280&message.id=3151

Let me know if you could change the behaviour of your "buggy system". Thanks for that!

I stay in contact with your problem.

Best wishes Jan Kniewasser

NI Germany, Application Engineer

[leodp]

Hi Mr Jingles,

I could solve the synchronization by using the TClk Synchronization method.
But my problems are far from solved.
I would like to generate a sinus with specified DC component and initial phase=0. This has to be done for various frequencies.
Example:  1V DC + 0,1V Sinus signal @  10kHz<freq<10MHz

The 5421 has a limitation: when I set a sinus (Standard waveform or User Defined)  the DC component can be at maximum 25% of the Sinus Amplitude.
So I define an Arbitrary Waveform. It is a bit a mess to correctly generate and synchronously read in periodic waves for a bunch of different frequencies, because you have to take care that the sampling and signal frequencies are in a correct ratio. What that means is that after some vi-math you are anyhow limited to generating only certain frequencies.

Anyhow I can live with that. Now I have my 0,1V sinus with 1V amplitude.
But the initial phase is not zero! Why??

-The initial phase does not depend on the length of the arbitrary wave (number of samples). If I double the samples by taking 2 periods, or take 10 of them, or what else, I still have the same initial dephasing.
- The initial phase depends on signal frequency and sampling frequency, but from what I see it is not a "time", like an initial delay due to programming the module memory.

Any idea? I hope somebody can give a hint.

Ciao, Leodp