Configures the frequency range of the spectrum read by NI-RFSA.

Supported Devices: PXI-5600, PXIe-5601/5603/5605/5606 (external digitizer mode), PXIe-5644/5645/5646, PXI-5661, PXIe-5663/5663E/5665/5667/5668, PXIe-5820/5830/5831/5832/5840/5841/5842/5860

You can configure a spectrum in one of two ways:

  • As a span of data surrounding the center frequency.
  • As a span of data between a start frequency and a stop frequency.

Each of these methods corresponds to an instance of this polymorphic VI.


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Details

Note If you configure the spectrum span (stop frequency– start frequency) to a value larger than the instantaneous bandwidth of the device, NI-RFSA performs multiple acquisitions and combines them into a spectrum of the size you requested.
Note For the PXIe-5663/5663E, NI-RFSA does not support multispan acquisitions from frequency ranges that correspond with different instantaneous bandwidths. For example, you cannot configure a multispan acquisition that acquires one span from 110 MHz to 120 MHz and a second from 120 MHz to 130 MHz because the bandwidths that correspond to each span are different (10 MHz and 20 MHz, respectively).