National Instruments PXIe‑5673E (781263‑01) RF Vector Signal Generator (РХIЕ‑5673Е is Cyrillic character typo)

Product Description

The PXIe‑5673E, part number 781263‑01, is a high‑performance 3‑slot PXI Express modular RF vector signal generator developed by National Instruments. It is an integrated assembly consisting of PXIe‑5450/5451 arbitrary waveform generator, PXIe‑5611 I/Q modulator and PXIe‑5652 local oscillator. It provides 50 MHz to 6.6 GHz frequency coverage with up to 100 MHz instantaneous modulation bandwidth and 128 MB onboard waveform memory. This enhanced version supports RF List Mode and adjustable PLL loop bandwidth for fast frequency switching. It adopts standard PXIe chassis installation, SMA RF connectors and 10 MHz external reference clock interface. NI has discontinued this product line, and available units on the market are mostly surplus or refurbished spare modules for maintaining legacy automated test systems.

Product Functions

• Generate continuous‑wave RF carriers and complex I/Q modulated RF signals for modern wireless communication tests
• Support AM, FM, PM, FSK, GMSK, PSK, QAM and multi‑tone arbitrary waveform modulation formats
• RF List Mode function enables rapid frequency and power hopping for radar and burst‑signal simulation
• Stream‑from‑disk waveform playback to output ultra‑long continuous test waveforms without onboard memory limitation
• Precise RF output power control, low phase noise and built‑in hardware self‑calibration routines
• 10 MHz reference clock and multi‑trigger synchronization ports for multi‑module MIMO and phased‑array test benches
• Controlled by NI‑RFSG driver and compatible with LabVIEW, LabWindows/CVI, C/C++ and .NET programming environments

Application Scenarios

• Wireless transceiver, power amplifier and RF front‑end validation for WLAN, GPS, cellular and IoT communication devices
• Aerospace and defense automatic test equipment for radar echo simulation, jamming signal and receiver sensitivity testing
• Semiconductor RF chip characterization and production end‑of‑line functional test systems
• Software‑defined radio, MIMO antenna array and beamforming algorithm verification platforms
• University and research laboratory broadband RF measurement and communication protocol research
• Spare replacement and technical retrofit of existing PXIe test racks after original production discontinuation

Common Problems

• No RF output or low output power：damaged SMA RF connectors, internal attenuator degradation or corrupted waveform memory data
• High EVM and poor modulation quality：aging I/Q modulator components, insufficient chassis cooling or contaminated RF signal path
• Trigger and synchronization timeout：oxidized PXIe backplane contacts, incompatible chassis clock or faulty trigger cables
• Intermittent waveform streaming interruption：overheating caused by clogged ventilation, outdated NI‑RFSG driver or insufficient system memory
• Instrument undetected by test software：PXIe slot resource conflict, chassis firmware mismatch or control circuit damage
• Large power and frequency drift over temperature：loss of factory calibration data or aging internal reference oscillator
• Maintenance difficulties：original production stopped, scarce replacement RF components and no official hardware repair service