PXI 5422 synchronization with other device problem

[maggie_ok]

Hey, can anybody kind enough to give some suggestion about the synchronization problem between the PXI-5422 and another device. I use PXI-8186 controller, Labview ver. 8.2.1, and NFEN ver. 2.5.1.

I have used the "script mode" of NFEN to switch between 2 periodic waveforms, which by themselve are composed of 74 waves with shorter period. Yet, all the 74 waves have the same sampling points, let's say 64. And I want to output a synchronization signal which has a period of 64 sample points.

This can be easily made by the "marker". However, error comes out when I try to compile my scripts, which says I have used too many "Generate" and "wait" commands.

My problem is how to generate a synchronization signal if the marker event is not effective.

The following is my LV program and my generated waveform.

Great thanks.

[E.Okawa]

Hello Maggie_ok,

Thanks for posting in our Discussion Forum.

Do you really need to generate the a synchronization signal?  Have you tried using NI-TCLK to synchronized clocks?
NI-TCLK is usually the easiest way to synchronize signals within a PXI-chassis. You can find some useful information here:

Using NI-TClk to Synchronize Signal Generators
http://zone.ni.com/devzone/cda/tut/p/id/5501

National Instruments T-Clock Technology for Timing and Synchronization of Modular Instruments
http://zone.ni.com/devzone/cda/tut/p/id/3675

If you are using LabVIEW, examples using NI-TCLK can be found here: Help >> Find Examples… >> Hardware Input and Output >> Modular Instruments >> NI-FGEN >> Synchronization.

Eric Okawa
Applications Engineering
National Instruments