The Astronics / EADS / Racal 1260-64A is a VXIbus microwave switch module delivering high-performance RF signal routing from DC to 18 GHz. This double-slot, C-size unit integrates four SP6T coaxial switches with 50 Ω impedance and break-before-make operation, plus 32 SPST relays for external device control. Direct SMA front-panel connections minimize insertion loss and noise. Peak power handling reaches 400 W at 100 MHz, declining to 40 W at 18 GHz. The module operates on +5 VDC at 2.8 A and generates internal supplies of +5 V, +12 V, and +24 V for relay drive circuits. Designed for cellular, PCS, Satcom, and military telecommunications ATE platforms, it requires an Astronics Option 01T smart controller for command and monitoring. Terminated switch versions are available. Temperature-rated 0 °C to 60 °C operating, -40 °C to 75 °C storage.
## Technical Specifications
**RF Performance**
• Frequency range: DC to 18 GHz
• Characteristic impedance: 50 Ω
• Switch topology: Four SP6T coaxial switches
• Switching mode: Break before make, normally open
• Maximum power per channel: 400 W @ 100 MHz, 150 W @ 1 GHz, 50 W @ 10 GHz, 40 W @ 18 GHz
• Connectors: SMA (front panel)
**DC Switching**
• SPST relay count: 32 (two 1×16 banks)
• Max voltage (terminal-to-terminal or terminal-to-chassis): 30 VDC
• Max current per bank: 4 A (DC or ACrms)
• Max power per module: 30 WDC, 62.5 VA
**Electrical**
• Input power: +5 VDC @ 2.8 A
• Internal supplies: +5 V, +12 V, +24 V
• Relay coil monitoring available
**Environmental**
• Operating temperature: 0 °C to 60 °C
• Storage temperature: -40 °C to 75 °C
• Humidity: 95% ±5% non-condensing at <30 °C
• Operating altitude: 10,000 ft
• Shock rating: 30 g, 11 ms, 1/2 sine
## Key Features
• Four independent SP6T switches in single module footprint
• Dual-bank relay architecture for mixed-signal switching
• 50 Ω matched impedance to 18 GHz
• Relay coil confidence checking
• CE mark compliance
## Typical Applications
• Cellular and PCS base station test
• Satellite communications signal routing
• Military telecommunications surveillance
• Automated RF and microwave test systems
## Compatibility & Integration
• VXIplug&play compliant
• Requires Astronics Option 01T smart controller
• LabWindows/CVI and LabVIEW driver support
• Message-based and register-based control modes
