The PXI-2594 is a PXI RF Multiplexer Switch Module from National Instruments, designed for high-frequency signal routing, automated RF testing, ATE systems, wireless validation, and modular PXI test platforms. As a 2.5 GHz, 50 Ω, 4×1 PXI RF multiplexer switch module, the NI PXI-2594 allows users to route RF signals between one common port and four RF channels. NI lists the PXI-2594 with part number 778572-94.
The NI PXI-2594 is useful for engineers who need to automate RF path selection in test systems. It can be used to route signals between RF signal generators, spectrum analyzers, vector signal analyzers, RF components, filters, amplifiers, receivers, antennas, and devices under test. Compared with manual RF switching, the PXI-2594 allows switching paths to be controlled through software, making it suitable for repeatable test sequences, production validation, and laboratory automation.
One of the main advantages of the PXI-2594 RF Multiplexer Switch Module is its 4×1 multiplexer topology. This configuration allows one RF path to be switched among four selectable channels, making it useful for source selection, measurement path switching, RF device testing, and compact switch network design. The module is designed for high-frequency signal routing inside automated test equipment systems and provides low insertion loss, strong VSWR performance, and good isolation to help reduce signal degradation.
The National Instruments PXI-2594 supports 50 Ω RF signal routing up to 2.5 GHz. This frequency range makes it suitable for many RF and wireless test applications, including RF front-end testing, communication device validation, amplifier testing, filter validation, receiver testing, RF source routing, and automated signal path selection. The device specifications list a maximum switching voltage of 30 V, maximum switching current of 0.5 A, maximum carry current of 0.5 A, and maximum RF power of 10 W.
Another useful feature of the NI PXI-2594 is onboard relay count tracking. This feature helps users monitor relay usage and estimate relay lifetime, reducing the risk of unexpected downtime in automated test systems. Relay count tracking is especially valuable in production environments where RF switch modules may operate repeatedly over long periods.
In system integration, the PXI-2594 PXI RF Multiplexer Switch Module installs into a compatible PXI or PXI hybrid chassis and can be used with RF signal generators, spectrum analyzers, vector signal transceivers, digitizers, source measure units, data acquisition modules, and other PXI instruments. This allows engineers to build compact automated RF test systems with software-controlled RF signal routing.
The PXI-2594 is suitable for applications such as RF signal routing, wireless device testing, RF path selection, receiver testing, filter validation, amplifier testing, production RF test, and automated measurement systems. Its 4×1 architecture is especially useful when multiple RF signal paths need to be switched to one common measurement or stimulus channel.
Overall, the NI PXI-2594 PXI RF Multiplexer Switch Module is a practical RF switching solution for PXI-based automated test systems. With its 2.5 GHz bandwidth, 50 Ω impedance, 4×1 multiplexer topology, relay count tracking, low insertion loss, and software-controlled switching capability, the PXI-2594 is well suited for RF signal routing, wireless validation, production testing, and modular PXI test applications.
