NI PXIe-5653

NI PXIE-5653 is identified by NI as a PXI Express RF analog signal generator and synthesizer module. In NI documentation for the PXIe-5665 platform, the module front panel is labeled “Synthesizer,” and the PXIe-5653 serves as the local oscillator and reference source module rather than a passive accessory or standalone benchtop instrument. NI’s safety/regulatory identification names it the “PXIe-5653 8.3 GHz PXI RF Analog Signal Generator.”

Official NI documentation shows three RF/local-oscillator outputs on the PXIe-5653: LO1 covering 3.2 GHz to 8.3 GHz, LO2 at 4 GHz, and LO3 at 800 MHz. The same NI guide also documents reference connectivity on the module, including REF IN at 10 MHz with 5 V p-p maximum, REF OUT at 10 MHz with 1.5 V p-p maximum, and REF OUT at 100 MHz with 1.5 V p-p maximum.

For timing configurations in the PXIe-5665 system, NI states that the PXIe-5653 accepts an external reference from 5 MHz to 100 MHz in 1 MHz steps on REF IN. NI also specifically warns not to use the PXIe-5653 10 MHz REF OUT connector as the timing reference source in that configuration, and instead describes use of the 100 MHz REF OUT connection to a PXIe-5622 CLK IN path.