- 50 Ω characteristic impedance
- 2.7 GHz bandwidth
- Insertion loss at 2.7 GHz <0.9 dB (typical <0.6 dB)
- VSWR at 2.7 GHz <1.5 (typical <1.35)
- Onboard relay counting
- Use NI Switch Executive for calibrating losses on each PXI-2548 channel
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The National Instruments PXI-2548 is a general-purpose switch module that features four (quad) independent SPDT relays suited for routing signals from DC to 2.7 GHz in 50 Ω RF applications. It can switch up to 30 Vrms or 500 mA at a maximum power rating of 10 W. Use the NI PXI-2548 to add flexibility to your switch network or to maintain uniform signal paths across multiple channels when building high-channel-count multiplexers. The module also features excellent insertion loss, voltage standing-wave ratio (VSWR), and isolation parameters to minimize signal degradation; and its onboard relay-count-tracking feature can be used to predict relay lifetime and reduce unexpected system downtime.
Note: The bandwidth specification of a switch module, which is not an absolute specification, 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 an 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, Mac OS, Unix, Other |
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| Switch Type | General-Purpose Relay, RF |
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| Relay Type | Electromechanical |
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| Connectivity | Cables |
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| Product Certifications | C-Tick, CE, FCC Part 15, UL - Product Safety |
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| Input Characteristics | |
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| Number of Relays | 4 SPDT |
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| Maximum Switching Voltage DC (Pollution Degree 2) | 30 VDC |
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| Maximum Switching Voltage DC (Pollution Degree 1) | 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 | 2.7 GHz |
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| Relay Count Tracking | Yes |
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| Voltage Category | CAT I |
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| Path Resistance (Typical) | 0.25 Ohm |
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| Dynamic Characteristics | |
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| VSWR (Typical) | 1.15 @ 1.5 GHz, 1.35 @ 2.7 GHz |
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| Isolation (Typical) | 39 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 | 1000000 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 | Analog |
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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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