NI PXIe-5645R

NI PXIE-5645R is an NI PXI Express Vector Signal Transceiver designed for RF test applications that need integrated signal generation, signal analysis, and FPGA-based processing in one module. NI documents identify the PXIe-5645R as part of the reconfigurable PXIe-5644R/5645R/5646R VST family, and they clearly distinguish it from the non-R PXIe-5645 naming. This distinction matters because the R-series documentation is tied to user-programmable FPGA functionality. https://download.ni.com/support/manuals/374798a.html https://www.ni.com/en/support/documentation/supplemental/12/the-ni-vector-signal-transceiver-hardware-architecture.html

Within this family, NI specifies RF coverage from 65 MHz to 6 GHz with up to 80 MHz complex instantaneous bandwidth for the PXIe-5644R/45R models. The architecture documentation also cites less than 1 Hz tuning resolution and describes local-oscillator stepping behavior using integer steps of 4, 12, and 24 MHz plus fractional stepping of 200 kHz. NI further states a maximum average RF output power of 6 dBm and support for signals with up to 12 dB crest factor. https://www.ni.com/en/support/documentation/supplemental/12/the-ni-vector-signal-transceiver-hardware-architecture.html

For embedded processing, NI lists a Xilinx Virtex-6 LX195T FPGA on the PXIe-5644R/45R, along with 24 digital I/O lines connected directly to the FPGA at up to 250 Mbit/s. Memory resources documented for these models include two 256 MB DRAM banks and 2 MB of onboard SRAM. NI also identifies the PXI Express backplane connection as PCI Express Gen 1 x4. These characteristics make the module suitable for reconfigurable RF prototyping and custom real-time signal processing workflows built around the VST architecture. https://www.ni.com/en/support/documentation/supplemental/12/the-ni-vector-signal-transceiver-hardware-architecture.html