The National Instruments PXI-2599 is a 26.5 GHz, 50 Ω dual SPDT RF relay module for automated RF and microwave signal routing.
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Key product information and technical features.
The PXI-2599 provides two single-pole double-throw relay paths for selecting signal routes or inserting and removing components from a signal path. NI also identifies upconverter harmonic routing and routing multiple sources to RF downconverters as applications.
NI-SWITCH documents the module's 2-SPDT topology and supports immediate and scanning operation. Onboard relay count tracking helps monitor relay usage.
Verified product specifications.
| Maximum signal frequency | 26.5 GHz |
|---|---|
| Topology | 2-SPDT |
| Characteristic impedance | 50 nominal Ω |
| Insertion loss at frequencies ≤26.5 GHz | <0.7"},{"evidence_ids":["EV-BULK-5376-1CACD8B93B"],"label":"VSWR at frequencies ≤26.5 GHz","status":"VERIFIED","unit":"—","value":"55 dB |
| RF carry power at frequencies ≤26.5 GHz | 25 W |
| Maximum voltage, cold-switching only | 90; CAT I Vrms |
| Maximum carry current per channel | 1.73 Arms |
| Relay operate/release time | 10 ms |
| I/O connectors | 6 SMA jacks |
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Manufacturer
Supported hardware platform
Dual SPDT RF relay module
PXI Hybrid
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Product-specific answers based on available technical information.
It provides a 2-SPDT topology with two single-pole double-throw relays. NI-SWITCH supports immediate and scanning operation.
NI recommends against switching active RF signals because relay actuation momentarily leaves the channel unterminated, potentially exposing the source to damaging reflections.
No. NI specifies 150 W through 3 GHz and 25 W through 26.5 GHz. Use the frequency-dependent carry-power table when selecting signal levels.