National Instruments is doubling its PXI RF switch offering for 50 and 75 ohm RF applications with the release of 11 new RF switches. The new modules include 4x1, terminated 4x1, dual 4x1 and 8x1 multiplexers as well as quad (4) SPDT and dual-terminated SPDT general-purpose configurations. With these new products, engineers have more choices to optimise their RF switch networks around price performance and improved signal integrity. The six new 2.5GHz 75ohm modules are the company's first switches for high-frequency video applications, such as set-top box testing. The five new 2.7GHz 50ohm modules add to the company's current RF switch offering of 10 modules for routing signals between DC and 26.5GHz and are suitable for expanding the channel count of RF generators, such as the NI PXI-5671 2.7GHz vector signal generator, or RF analysers such as the NI PXI-5661 2.7GHz vector signal analyser.
All 11 modules offer extremely low insertion loss (less than 2.1dB at specified bandwidth) and voltage-standing wave ratio (less than 1.75 at bandwidth) to minimise power loss, voltage attenuation and signal reflections. Alternative PXI RF switches available on the market are said to have up to 3dB of insertion loss and voltage-standing wave ratio greater than 1.8 at their bandwidth frequencies. The new modules also offer relay count tracking, which is said to be a feature available only on National Instruments PXI modules. With this feature, engineers can keep track of relay closures on board the hardware to estimate the lifetime of individual relays on the module and avoid unexpected system downtime.
Engineers can program all of the new switches using the full-featured NI-Switch driver software for basic relay operations in common development environments such as the NI LabVIEW graphical development environment, LabWindows/CVI for ANSI C development and Microsoft Visual Basic/C++. For additional assistance in configuring, programming and managing high-channel-count switching systems, NI Switch Executive software offers an easy-to-use, intelligent switch management and visual routing environment. Once they have configured and programmed their switch networks, engineers can deploy them using NI TestStand, a ready-to-run test management environment and framework designed to simplify the automation of test and validation systems.
New RF switch modules for communications and video test
|50 Ohm Modules (2.7GHz)||75 Ohm Modules (2.5GHz)|
|PXI-2545 – Dual 4x1||PXI-2554 – 4x1|
|PXI-2546 – Term 4x1||PXI-2555 – Dual 4x1|
|PXI-2547 – 8x1||PXI-2556 – Term 4x1|
|PXI-2548 – Dual Term SPDT||PXI-2557 – 8x1|
|PXI-2549 – Quad SPDT||PXI-2558 – Dual Term SPDT|
|PXI-2559 – Quad SPDT|
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About NI Modular Instruments
NI offers systems that combine high-performance hardware, flexible software and innovative timing and synchronisation technologies for test and design applications. NI modular instruments offer accurate, high-throughput measurements from DC to 6.6GHz. The product family includes:
- Digitisers/oscilloscopes (up to 24 bits, up to 2 GS/s, up to eight channels)
- Signal generators (up to 16 bits, 200 MS/s)
- Digital waveform generator/analysers (up to 400 Mb/s)
- RF signal generators and analysers (up to 6.6GHz)
- Digital multimeters (up to 7.5 digits, LCR)
- Programmable power supplies (up to 20W, 16 bits)
- Dynamic signal analysers (up to 24 bits, 500kS/s)
- Switching (multiplexers, matrices, general-purpose and RF)