The Astronics / EADS / Racal 1260-45A is a C-size VXIbus high-density switch matrix module engineered for complex signal routing in automated test systems. This single-slot unit delivers eleven factory-configurable matrix arrangements—from four 4×16 matrices to a single 16×16 matrix—enabling flexible signal path management within a single chassis. The module switches signals up to 1 A and 250 VDC, with bandwidth performance ranging from 25 MHz (4×16, 4×32 configurations) to 20 MHz (4×64 configuration). Guard relays at row inputs provide non-latching behavior with automatic disconnect on power loss, protecting the Unit Under Test. Jumper-selectable bypass enables full latching relay operation for communication applications requiring maintained signal paths.
## Technical Specifications
• **Form Factor:** C-size, single-slot VXIbus module
• **Matrix Configurations:** Eleven selectable arrangements including four 4×16, two 8×16, two 4×32, one 8×32, one 4×64, one 16×16, and hybrid combinations (two 4×16 + one 8×16, two 4×16 + one 4×32)
• **Switching Voltage:** Up to 250 VDC or 300 VDC/ACrms maximum
• **Switching Current:** Up to 1 A DC or ACrms per channel
• **Bandwidth (−3 dB):** 25 MHz (4×16, 4×32); 20 MHz (4×64)
• **Channel Capacitance:** <50 pF (open); <80 pF (closed)
• **Relay Type:** Non-latching guard relays with jumper-selectable latching configuration
• **Mechanical Operations Rating:** 10,000,000 cycles
## Key Features
• Guard relays at row inputs revert to open state on power loss, disconnecting signal paths from UUT
• Configurable via factory settings, internal jumpers, and external cabling
• External expansion capability for larger matrices within single chassis
• Low closed-channel capacitance supports high-frequency signal integrity
## Interfaces
• VXIbus compliant
• Compatible with Option 01 (native command set) and Option 01T (SCPI and register-based control)
• IDC ribbon cable or crimp discrete wire connectors available
## Physical Characteristics
• Weight: 3.07 lb (1.38 kg) without Option 01
