The PCI-5640R has two AO ports. The AO signal is generated from the 14-bit IC AD 9857 DAC. The DAC also has an integrated DUC that performs the following tasks needed to process a signal for transmission:

  • Baseband to IF conversion using a digital mixer and digital NCO.
  • Interpolation filter.
  • Inverse CIC compensation for the interpolation filter.

Pulse shaping filtering for the output data is not performed by the AD 9857 DAC; it must be performed in your application or, if you are using LabVIEW FPGA to create your application, in the FPGA before sending the data to the DAC.

The following figure shows the filtering blocks for analog output.