NI PXIE-5646R is a PXI Express RF Vector Signal Transceiver positioned by NI as a 6 GHz, 200 MHz bandwidth VST. NI’s official product listing identifies the platform as PXI Express and describes the hardware as “PXIe-5646R VST, 200 MHz BW - Legacy,” making it clear this is an RF transceiver instrument rather than a general-purpose DAQ module. Source: https://www.ni.com/en/shop/hardware/rf-vector-signal-generators--analyzers--and-transceivers/model-pxie-5646
Within NI documentation, the family naming requires careful distinction. NI publicly markets the page as PXIe-5646, while the product description explicitly names PXIe-5646R, and the official Getting Started Guide documents a PXIe-5646R-G module. NI’s Letter of Volatility also groups PXIe-5646, 5646R, and 5646R-G together, confirming related official designations but not fully defining commercial equivalence among all variants. Sources: https://www.ni.com/en/shop/hardware/rf-vector-signal-generators--analyzers--and-transceivers/model-pxie-5646 ; https://download.ni.com/support/manuals/375319a.pdf ; https://docs-be.ni.com/bundle/pxie-5646r-letter-of-volatility/raw/resource/enus/374319b.pdf
For system integration, NI specifies a 3-slot module width and PXI Express connectivity. The Getting Started Guide states that the NI 5646R-G is a three-slot module that requires three adjacent chassis slots, with the left two slots PXI Express compatible, and that it can be installed in PXI Express peripheral, PXI Express Hybrid peripheral, or PXI Express system timing slots. NI also lists peer-to-peer streaming support and a typical analyzer tuning time of 1.2 ms on the product page. Sources: https://www.ni.com/en/shop/hardware/rf-vector-signal-generators--analyzers--and-transceivers/model-pxie-5646 ; https://download.ni.com/support/manuals/375319a.pdf
