The National Instruments 781432-01 is a PXIe-5831 RF Analog Signal Generator Module, designed to deliver advanced performance for RF applications with a frequency range of 800 MHz to 8.3 GHz. This module is particularly well-suited for continuous-wave (CW) generation and functions efficiently as a synthesizer or local oscillator source when integrated with PXIe-5831 or PXIe-5832 Vector Signal Transceiver instruments. Its compatibility with other models, such as the PXIe-5665, PXIe-5667, and PXIe-5668 Vector Signal Analyzers, enhances its utility as a comprehensive solution for RF signal generation and analysis.

The 781432-01 features critical connectors for optimum signal routing and synchronization, including a REF IN connector that accepts a 10 MHz frequency signal with a maximum voltage of 2 Vpk-pk. It also provides REF OUT connectors for 10 MHz and 100 MHz reference signals generated by the onboard oven-controlled crystal oscillator (OCXO). The module includes multiple local oscillator outputs: LO1 OUT for 3.2 GHz to 8.3 GHz, LO2 OUT for 4 GHz, and LO3 OUT for 800 MHz, all utilizing SMA connectors with a nominal impedance of 50 Ω for reliable signal transmission. Real-time operational status is indicated through LED indicators; the ACCESS LED reflects hardware status in various colors, while the ACTIVE LED monitors the signal generation status, indicating normal operation, PLL lock attempts, and error conditions.