Channel & Topology Configuration

• 32 single-ended RF signal channels with four dedicated common (COM) ports
• Predefined standard topologies: 8×1, 16×1, 32×1 unterminated multiplexers
• Custom flexible topologies: 4×1/8×1 externally terminated multiplexers, 36-terminal sparse matrix
• Quad independent 8-channel signal banks for parallel multi-group RF switching
• Rear 96-pin shielded DIN connector for SCXI chassis backplane communication

Core RF Electrical Specifications

• Characteristic impedance: Fixed 50 Ω for standard RF coaxial matching
• Operating bandwidth: DC to 500 MHz (-3 dB insertion loss threshold)
• Insertion loss: ≤0.3 dB @ 100 MHz, ≤0.8 dB @ 500 MHz per signal path
• VSWR: ≤1.2:1 across full bandwidth for minimal signal reflection
• Channel isolation: >70 dB @ 100 MHz, >52 dB @ 500 MHz

Relay Switching Ratings & Timing

• Switching signal power: Max 1 W continuous RF power per channel
• DC current rating: 0.5 A switching current, 1 A continuous carry current
• Relay type: Break-before-make electromechanical RF relays
• Operate/release time: 4 ms typical total switching latency
• Max scan rate: 100 channel switching operations per second
• Phase matching: <100 ps inter-bank propagation skew

Reliability & Isolation Parameters

• Mechanical relay lifespan: 100 million no-load switching cycles
• Electrical lifespan: 2 million cycles under 0.5 W RF load
• Channel-to-chassis isolation: 1000 Vrms transient surge withstand
• Initial on-path resistance: <1.0 Ω, end-of-life threshold ≥2.0 Ω
• Internal stub suppression: Optimized dual-path routing to eliminate RF reflection

Mechanical & Environmental Specifications

• Dimension: 172×86×32 mm, standard single-slot SCXI module footprint
• Operating temperature: 0℃ ~ +50℃
• Storage temperature: -20℃ ~ +70℃
• Humidity: 10%–90% non-condensing, max working altitude 2000 m
• EMC compliance: CE, FCC Class A industrial electromagnetic certification

Compatibility Matching List

• Matched terminal block: SCXI-1334 50 Ω RF coaxial terminal block
• Compatible chassis: SCXI-1000, SCXI-1001 AC-powered chassis
• Compatible controllers: SCXI-1600, PCI/PXI SCXI bus adapters
• Official status: Obsolete, no new official inventory supply

Software Compatibility

• Drivers: NI-SWITCH 2.0 and above, NI-DAQmx, Traditional NI-DAQ
• Configuration tools: NI MAX, NI Switch Executive
• Supported software: LabVIEW, LabWindows/CVI, Python DAQmx, C#

Pros & Limitations

• Pros: 500 MHz wide RF bandwidth, flexible software-defined topologies, low phase skew for differential signals, low insertion loss, standardized 50 Ω impedance matching, long relay service life
• Limitations: No onboard RF terminators (requires external accessories), limited RF power tolerance, obsolete lifecycle, not compatible with low-frequency analog signal multiplexing