- 50 Ω characteristic impedance
- 2.5 GHz bandwidth
- Insertion loss at 2.5 GHz <1.35 dB
- VSWR at 2.5 GHz <1.45
- Onboard relay counting
- SMA direct connectivity
 Data Sheet |
Configure System 
The National Instruments SCXI-1194 is a quad 4x1 high-frequency unterminated multiplexing switch capable of switching signals from DC to 2.5 GHz. The characteristic impedance of the channels on this module is 50 Ω. The NI SCXI-1194 has a maximum voltage rating of 30 Vrms with a maximum switching current of 500 mA. It is well-suited for applications that require the routing of high-frequency signals inside automated test equipment (ATE) systems because it can switch signals with very low insertion loss. In addition, the excellent voltage standing-wave ratio (VSWR) and isolation parameters make this module the perfect choice in any system geared toward high-frequency applications. The SCXI-1194 also offers relay count tracking to help reduce unexpected system downtime.
Note: The bandwidth specification of a switch module is not an absolute specification and is determined by vendor standards. Although you can route higher-frequency signals through this switch module, they encounter more degradation than those at lower frequencies. To determine the best switch module for your application, review the insertion loss, VSWR, and isolation specifications of the product for the bandwidth of your application. For more information on choosing the right RF switch for your application, review the "Guide to Selecting an RF Switch" under the Resources tab.
Additional Product Information
Related Information
Specifications Documents
Specifications Summary
| General | |
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| Form Factor | SCXI |
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| OS Support | Windows, Real-Time, Linux |
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| LabVIEW RT Support | Yes |
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| Switch Type | Multiplexer, RF |
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| Relay Type | Electromechanical |
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| Connectivity | Cables |
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| Product Certifications | C-Tick, CAN/CSA, CE, FCC Part 15, IEC, UL - Product Safety |
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| Input Characteristics | |
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| Multiplexer Configurations | 4 banks of 4x1, 1-wire |
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| Maximum Switching Voltage DC (Pollution Degree 2) | 30 VDC |
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| Maximum Switching Voltage AC | 30 Vrms |
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| Maximum Switching Current | 0.5 A |
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| Maximum Carry Current | 0.5 A |
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| Maximum Switching Power | 10 W |
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| Bandwidth | 2.5 GHz |
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| Relay Count Tracking | Yes |
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| Voltage Category | CAT I |
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| Path Resistance (Typical) | 0.35 Ohm |
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| Dynamic Characteristics | |
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| VSWR (Typical) | 1.25 @ 1 GHz |
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| Isolation (Typical) | 55 dB |
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| Insertion Loss (Typical) | 0.6 dB |
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| Terminated | No |
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| Characteristic Impedance | 50 Ohm |
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| Mechanical Relay Life | 1 x 107 cycles |
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| Scan Rate | 45 cycles/s |
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| Timing/Triggering/Synchronization | |
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| Synchronization Bus (RTSI) | Yes |
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| Triggering | Digital |
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| External Clocking | No |
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| Physical Specifications | |
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| Length | 19.8 cm |
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| Width | 17.3 cm |
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| Height | 3 cm |
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| I/O Connector | SMA female |
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Extended Warranties
National Instruments designs and manufactures all products to minimize failures, but we know unexpected failures can still occur. Extended warranties provide a fixed economical price at the time of system purchase covering any repair costs for up to three years.
- Significant cost savings compared to individual repair incidents
- Fault location, diagnostics, and repair by NI any time the system product fails
- All parts and labor costs covered as well as any adjustments needed to bring the hardware back to manufacturing specifications
Calibration
NI recognizes the need to maintain properly calibrated devices for high-accuracy measurements. We provide manual calibration procedures, services to recalibrate your products, and automated calibration software to calibrate many of our measurement products.
Training
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Repair Services
- You can return your registered product under warranty at no additional labor and parts cost. NI offers fault location, diagnostics, and repair any time the system fails as well as any adjustments needed to bring the hardware back to manufacturing specifications.
- Contact us to obtain a Return Material Authorization (RMA) form and shipping instructions
- View your RMA support request status online
- Register your product
Technical Support
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