Arbitrary Waveform Output with NI 5402 Hardware: Signal Sources (AWG/FG/AO)>>Arbitrary Waveform and Function Generators>>PCI-5402, Signal Sources (AWG/FG/AO)>>Arbitrary Waveform and Function Generators>>PXI-5402
Problem: I would like to use the NI 5402 in Arbitrary Waveform Output mode but it is throwing Error -1074135039 "Invalid Output Mode", why is this? (Error shown as Figure 1 below)  Figure 1. Invalid Output Mode Error
Solution: The NI 5402 does not support Arbitrary Waveform Output mode; however a user defined waveform can be generated by the NI 5402 when configured correctly. The NI 5402 requires a User Defined Waveform of length 16384 samples to be loaded into device memory*. The sample size is 2 bytes, for a total memory of 38kb. This waveform is created as an array of doubles and placed into memory using the niFgen Define User Standard Waveform.VI. The following steps must be taken to configure the NI 5402 to output the User Defined Waveform.
 Figure 2. User Defined Waveform Configuration A completed example is attached to this KnowledgeBase in LabVIEW 8.2 and LabVIEW 8.5 format. * Note: The difference is with a function generator (i.e. PXI-5402) and a waveform generator (i.e. PXI-5422) is the waveform needs to be a standard size because it is a function, not a waveform and in this particular case, 16384 samples. You can imagine it as the sine wave output is a standard function and to replace it, you would replace it with something the same size. This is why it requires 16384 samples. Whereas, a waveform generator can take in a waveform of arbitrary size. Related Links: KnowledgeBase 459I25DF "Device not found" or "Invalid Output Mode" Error When Using PXI-5402 in Arbitrary Waveform or Arbitrary Sequence Mode Attachments:  niFgen_User_Defined_Wfm_8_2.viniFgen_User_Defined_Wfm_8_5.vi
Report Date: 10/17/2007 Last Updated: 01/04/2008 Document ID: 4EGM4UVZ |
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