How Do I Set Precise IQ Rates in NI-RFSG Instead of Divide-By-N Rates?Primary Software: Driver Software>>NI-RFSGPrimary Software Version: N/A Primary Software Fixed Version: N/A Secondary Software: LabVIEW Development Systems>>LabVIEW Full Development System
Problem: I want to be able to set a precise IQ rate, but it keeps coercing the rate to a different value. I see in the NI-RFSG Help that allowable rates consist of 100 MS/s, 50 MS/s, and (100 MS/s)/n. Is there any way to set a different rate? Solution: Divide-By-N clocking is used by default, but there is also a High-Resolution clocking mode that can be used in order to set a specific IQ rate. Change the Arb Onboard Sample Clock Mode to High Resolution in order to set a precise IQ rate.  Note: Because High-Resolution clocking has more jitter than Divide-By-N clocking, extra spurs may occur in the signal generator output spectrum. If you cannot tolerate these spurs, either use a pure external clock as the Sample clock of the signal generator, or use software resampling to change the IQ data to an IQ rate that works with Divide-By-N clocking. Related Links: Developer Zone Tutorial: RF and Communications Fundamentals KnowledgeBase 42GFJCY5: ni5660 Configure for IQ VI Sets Incorrect RF and IF Attenuation Values on NI PXI-5660 RF Signal Analyzer KnowledgeBase 4CLG6TY5: How to Configure the Gain Properly on the NI PXIe-5672 RF Vector Signal Generator When Generating Data Recorded With NI-RFSA Attachments:
Report Date: 10/29/2008 Last Updated: 11/04/2008 Document ID: 4QSHMF0U |
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