The National Instruments 783156-01, also known as the PXIe-5668R, is an advanced Vector Signal Analyzer (VSA) engineered for high-performance applications in wireless communications, RF integrated circuit characterization, radar testing, and spectrum monitoring. It operates across an extensive frequency range of 20 Hz to 14 GHz, meeting the diverse demands of contemporary RF applications. With a tuning resolution as fine as 533 nHz, the VSA enables precise frequency selection for comprehensive signal analysis. Depending on configuration, the instrument supports an equalized bandwidth of up to 765 MHz, with standard options of 80 MHz and potential upgrades available for 200 MHz, 320 MHz, and 765 MHz. The resolution bandwidth can vary from less than 1 Hz to 320 MHz, facilitating accurate spectral analysis across a broad spectrum of signal types.

Integrating several critical modules—including the PXIe-5606 RF Signal Downconverter, PXIe-5624 IF Digitizer, and PXIe-5653 RF Analog Signal Generator—this VSA ensures high-fidelity signal capture and measurement with excellent spectral purity, featuring single sideband (SSB) phase noise as low as -140 dBc/Hz at a 1 MHz offset. Housed in a compact 3U, 7-slot PXI Express form factor, the 783156-01 is ideal for seamless integration into existing test infrastructures. Its amplitude range extends from the average noise level to +30 dBm, with electronic RF input attenuation adjustable from 0 dB to 30 dB in 1 dB increments, achieving superior amplitude accuracy and frequency response deviations as minimal as ±0.06 dB in the 10 MHz to 100 MHz range.

Additionally, the 783156-01 supports complex modulation analysis, offering application-specific modulation quality metrics such as OFDM EVM for WLAN 802.11ac signals. It provides detailed spurious response analysis, including residual spurs and higher-order RF responses, while its rapid tuning times, preselector tuning, and multi-instrument synchronization capabilities make it an optimal solution for high-volume manufacturing tests and phase-coherent MIMO testing.