NI-TClk
Performance Optimization

To ensure correct synchronization, you must call the niTClk Synchronize VI or the niTClk_Synchronize function every time you change a clocking or sample rate attribute for a TClk-synchronized device. Each call to the niTClk Synchronize VI or the niTClk_Synchronize function adds time to the application execution.

To optimize the performance of your application, set the clocking and sample rate attributes only once, then call the niTClk Synchronize VI or the niTClk_Synchronize function.

You do not need to call the niTClk Synchronize VI or the niTClk_Synchronize function every time you initiate or start an acquisition unless you are changing attributes that affect clocking or sample rate. These attributes are listed in the table below. For the NI 5922 digitizer, this list of attributes also includes channel-based attributes.

Caution  NI-TClk does not detect any changes to the relevant attributes. Therefore, no errors are reported if the devices become unsynchronized because of an attribute change. You must remember to resynchronize if any of these attributes change.

Note   You should call the niTClk Configure for Homogenous Trigers VI the niTClk_ConfigureForHomogeneousTriggers function any time any driver attribute changes value.