ni5660 Fetch IQ
This VI returns the IQ waveform acquired by the RF Signal Analyzer during a previously initiated acquisition. This VI returns IQ data computed through a process of filtering, decimation, and downconversion. Use this VI with the ni5660 Initiate VI when continuously acquiring data.
 |
Note Continous IQ acquisition is only possible for bandwidths smaller than 1.25 MHz. Refer to Small Span Signals and Sample Rates for more information. |
 |
receiver info in is the instrument handle that you obtain from the ni5660 Initialize VI. The handle identifies a particular RF Signal Analyzer session. |
 |
samples to read specifies the number of samples to fetch. A value of –1 fetches the actual record length. Default Value: –1 |
 |
timeout (sec) specifies the maximum amount of time in seconds to wait for the acquisition to finish. After this amount of time, the VI returns an error if the acquisition is not complete. If this parameter is set to 0, it returns immediately without checking the acquisition status. If this parameter is set to –1, the function waits forever. Default Value: 5 seconds |
|
error in accepts error information wired from previously called VIs.
The pop-up option Explain Error (or Explain Warning) gives more information about the error displayed.
|
 |
receiver info out passes a reference to your instrument session to the next VI.
receiver info was obtained from the ni5660 Initialize VI.
|
|
IQ waveform contains the baseband (downconverted) time-domain waveform for demodulation. This cluster contains the following elements:
|
| | error out passes error or warning information out of a VI to be used by other VIs. The pop-up option Explain Error (or Explain Warning) gives more information about the error displayed.
|
