The Keysight (Agilent) 87104D is a Single Pole Four Throw (SP4T) electromechanical coaxial switch engineered for RF and microwave signal routing in automated test equipment and precision measurement systems. Operating from DC to 40 GHz, this terminated switch delivers high isolation and exceptional insertion loss repeatability to minimize measurement errors across complex signal paths.
Technical Specifications
Electrical Performance
• Operating frequency range: DC to 40 GHz
• Unmatched isolation: minimum 65 dB at 40 GHz; typical > 90 dB at 26.5 GHz
• Insertion loss repeatability: 0.03 dB guaranteed for 5 million cycles at 25 °C
• Maximum power into internal termination: 1 W CW, 50 W peak (10 µs max pulse, ≤1 W average)
• Maximum power into thru path (hot switching): 2 W CW, 100 W peak (10 µs max pulse, ≤2 W average)
• Control voltage: 24 VDC
• Operating life: 10 million cycles typical
Physical & Mechanical
• Configuration: SP4T, terminated
• Flange: 2¼ inch square with mounting holes
• Body: 2½ inch long × 2¼ inch diameter
– Key Features
• Magnetic latching for reliable state retention
• Electronic position indicator for switch status monitoring
• Opto-electronic indicators and current interrupt capability to prevent circuit damage and extend switch life
• Terminated ports—all non-selected paths are 50-ohm terminated
• “Open all paths” logic that opens all but selected ports before closing selected paths
• TTL logic control available with Option T24
• Alternative connection options: 16-pin DIP socket with 24-inch ribbon cable (Option 161) or solder terminal connections (Option 100)
– Typical Applications
Automated test equipment (ATE) requiring high-isolation signal routing, multiport RF/microwave measurement systems, precision calibration setups, and applications where insertion loss repeatability and measurement accuracy are critical.
– Compatibility & Integration
The 87104D accepts 24 VDC control with standard logic or TTL logic (Option T24). Control connections support ribbon cable with 16-pin DIP interface (Option 161) or direct solder terminals (Option 100). The standard industry footprint integrates readily into existing test systems.
