Product Short Description
Product Name
PXI-2597 26.5 GHz 50 Ω 6×1 Terminated PXI RF Multiplexer Switch Module
Product Overview
The PXI-2597 is a terminated RF multiplexer switch module used for high-frequency signal routing in PXI-based automated test systems. It routes multiple RF sources to upconverters or downconverters and prevents high-power reflections from open channels through internal 50 Ω termination.
Description
Technical Specifications
- Bandwidth: DC to 26.5 GHz
- Characteristic Impedance: 50 Ω
- Topology: 6×1 SP6T terminated multiplexer
- Maximum Switching Voltage: 90 V AC
- Maximum Insertion Loss: 0.7 dB
- Relay Type: Electromechanical
- Channel Count: 6
- Slot Requirement: 3 slots
- Backplane Power: 3.3 V, 5 V, 12 V from PXI backplane
- Operating Temperature: 0 °C to 55 °C
- Storage Temperature: -40 °C to 70 °C
- Dimensions: 21.6 cm × 6.1 cm × 13.0 cm
- Weight: 490 g
Functional Features
- Onboard relay count tracking for predictive maintenance
- Internal termination reduces open-channel reflections
- Compatible with PXI Express hybrid slots and PXI peripheral slots
- Software-configurable switching through NI Switch Executive and NI-DAQmx
Channel Isolation
- > 80 dB up to 3 GHz
- > 70 dB up to 8 GHz
- > 60 dB up to 18 GHz
- > 55 dB up to 26.5 GHz
Working Principle
Electromechanical relays connect one of six RF inputs to a common output. Unselected channels are terminated to 50 Ω to maintain impedance matching and protect sensitive RF instruments from reflection and standing-wave damage.
Application Scenarios
- RF signal routing
- PXI RF upconversion and downconversion systems
- Wireless device test
- Radar and microwave component test
- High-frequency automated test equipment
Installation Requirements
- Install in a PXI or PXI Express chassis with PXI hybrid peripheral slot support
- Keep adjacent slots clear because the module occupies three slots
- Use approved RF cables and torque-compatible connectors
- Maintain chassis cooling and do not block ventilation
- Install NI Switch Executive or NI-DAQmx driver software
Usage Notes
- Avoid exceeding 90 V AC switching rating
- Do not operate outside 0 °C to 55 °C ambient range
- Minimize unnecessary relay actuations to extend relay life
- Keep unused slots filled with filler panels for airflow and EMC compliance
- Handle RF connectors carefully to prevent insertion-loss increase
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