NI PXIE-3630

NI PXIE-3630 is identified by NI as a baseband digitizer and baseband receiver module within the NI mmWave Transceiver System. NI documentation places it in the modular baseband/IF subsystem alongside PXIe-3610, PXIe-3620, and PXIe-7902, while separate mmWave radio heads are treated as different products. This supports cataloging the PXIe-3630 as an active PXI Express measurement module rather than a passive accessory or standalone radio head. https://www.ni.com/pdf/datasheet/us/71_76_GHz_Millimeter_Wave_Transceiver_System.pdf https://www.ni.com/docs/en-US/bundle/mmwave-transceiver-system-getting-started/page/overview.html

The front panel documentation shows a differential analog I/Q architecture with dedicated I+, I-, Q+, and Q- inputs. NI specifies these analog ports as MMPX female connectors and states that the I+/I- and Q+/Q- pairs present a differential 100 ohm load at 0 V common-mode. For single-ended operation, NI instructs using the positive input with 50 ohm termination on the negative side. The same front panel section also documents a 96 MHz REF OUT on MMPX female and notes that REF IN is currently unsupported, with the PXI_100 backplane reference used instead as the reference input. https://www.ni.com/docs/en-US/bundle/mmwave-transceiver-system-getting-started/page/pinout.3.html

NI also documents system interconnection requirements for the PXIe-3630. Its digital I/Q connectors must be connected to the PXIe-7902 FPGA module, making that pairing a documented integration dependency in the mmWave platform. On the front panel, NI labels ACCESS and ACTIVE LEDs, and explicitly states that the ACCESS LED indicates whether the ADC within the module is powered. NI’s Letter of Volatility further confirms onboard nonvolatile storage and lists board assembly part number 140145A-01L or later for PXIe-3630, but this should not be treated as a commercial orderable SKU. https://www.ni.com/docs/en-US/bundle/mmwave-transceiver-system-getting-started/page/pinout.3.html https://www.ni.com/pdf/manuals/376334b.pdf