National Instruments PXI-2557

The National Instruments PXI-2557 (Part Number: 778572-57) is a high-performance PXI RF Multiplexer Switch Module designed for applications requiring extensive switching of RF signals, particularly in testing environments where multiple video tuners need to be accessed by a single RF analyzer channel. Featuring a higher channel count, the PXI-2557 is ideally suited for complex test frameworks. It is important to consider the insertion loss associated with the switch, as this metric indicates the signal degradation and power loss incurred during signal routing. The module’s insertion loss characteristics can be represented graphically, similar to a Bode plot, which is crucial in selecting the appropriate switch for a given RF application. Furthermore, the PXI-2557 provides Voltage Standing Wave Ratio (VSWR) metrics, reflecting the relationship between reflected and transmitted waves. This measurement is vital in RF systems to minimize signal deterioration due to impedance mismatches common in switch modules. Robustly constructed, the PXI-2557 measures 8.5 x 0.8 x 5.1 inches and weighs 8.0 ounces. It is backed by a warranty of 2-3 years and includes user and maintenance manuals available for download. For pricing information, please contact a sales representative.