Error 1074118301 When Configure Downconverter Frequency Offset

Updated Feb 25, 2022

Reported In

Hardware

  • PXIe-5840

Driver

  • NI-RFSA

Issue Details

When I tried to configurate downconverter frequency offset property for I/Q acquisition, it shown error:
Error -1074118301 occurred at niRFSA Read IQ (Complex WDT 1Rec 1Chan).vi
Possible reason(s): 
The signal is outside of the downconverter passband
image.png
How should I know valid value for downconverter frequency offset?

Solution

NI-RFSA driver only allows set downconverter frequency offset up to half of the instantaneous bandwidth. You can obtain instantaneous bandwidth value based on the hardware specifications.

For example, NI PXIe 5840 with I/Q carrier frequency configure at value in range of 1.3 GHz to 2.2 GHz will have instantaneous bandwidth of 500MHz. Therefore, downconverter frequency offset will be up to maximum 250MHz.

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