The Astronics/EADS/Racal 1260-54 is a 1.3 GHz RF multiplexer VXI module engineered for high-frequency signal routing and switching in VXI-based test systems. Six independent banks, each configured as 1×4 multiplexers, deliver flexible channel selection with tree architecture that eliminates unterminated stub effects and preserves signal integrity across the frequency range.
## Technical Specifications
• **Module Type:** 1.3 GHz RF Multiplexer VXI Module
• **Configuration:** Six independent 1×4 tree multiplexers (24 total switched channels)
• **Frequency Range:** Up to 1.3 GHz
• **DC Performance:** Offset voltage 10⁸ Ω
• **Channel Isolation:** Excellent performance between channels
• **Crosstalk:** Excellent performance
• **VSWR:** Excellent performance
• **Low-Noise Operation:** Designed for switching of low-level RF signals
## Key Features
• Tree switching architecture mitigates bandwidth limitations from unterminated stubs
• Optional on-board 50 Ω terminators for unused inputs
• Fifth position per bank provides no-connect state when signal isolation is required
• Single connection constraint: only one active connection per common bus at any time
• Relay coil current monitoring enables confidence checking of relay operation status
• Message-based control via Option 01 interface with standard command syntax: `CLOSE .`
• CE marked for compliance with European electrical safety standards, RF emissions, and electromagnetic immunity
## Interfaces & Control
• VXIbus interface compatibility
• Option 01 Smart Card Module required for message-based control
• Approximately 2.59 lb (1.17 kg) weight without Option 01
## Typical Applications
RF signal routing in automated test equipment, receiver multichannel selection, transmit path switching, and low-level signal multiplexing in laboratory and production test environments.
