- 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
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The National Instruments PXI-2594 is a 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 PXI-2594 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 PXI-2594 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 higher frequency signals can be routed through this switch module, they will encounter more degradation than those at lower frequencies. In order 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 and RF Switch’ linked in the 'Resources' section of this page.
Additional Product Information
Related Information
Specifications Documents
Specifications Summary
| General | |
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| Form Factor | PXI |
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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 | 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 | 16 cm |
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| Width | 10 cm |
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| Height | 2 cm |
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| I/O Connector | SMA female |
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