6 GHz, 80 MHz Bandwidth, RF PXI Vector Signal Transceiver—The PXIe‑5644 combines a vector signal generator and vector signal analyzer with FPGA-based real-time signal processing and control into a single device, also known as a VST. Because of this software-designed approach, the PXIe‑5644 features the flexibility of a software defined radio architecture with RF instrument class performance.