The Agilent/Keysight E1475A is a VXIbus C-size, 1-slot RF multiplexer expander module designed to extend switching capacity in 75-ohm video and telecommunications test systems. This register-based expander connects to either an E1472A (50 ohm) or E1474A (75 ohm) RF multiplexer and provides six 1×4 multiplexer banks with switching capability up to 1.3 GHz. Up to two E1475A units cascade to a single multiplexer, yielding eighteen total 1×4 banks. The module features non-latching armature relays per channel in a tree-switched configuration, delivering high isolation and low VSWR. SMB male connectors provide RF signal connectivity. Typical insertion loss remains below 0.1 dB at 10 MHz, 0.4 dB at 100 MHz, 0.9 dB at 500 MHz, and 1.5 dB at 1.3 GHz.
Technical Specifications
• Form Factor: VXIbus C-size, 1-slot module
• Impedance: 75 ohms
• Maximum Switching Frequency: 1.3 GHz
• Configuration: Six 1×4 multiplexers per module
• RF Connectors: SMB male
• Relay Type: Non-latching armature, per channel
• Switching Topology: Tree-switched configuration
• Power-on/Reset State: Channels 00, 10, 20, 30, 40, 50 connect to respective COM ports; all others open
– Key Features
• Cascadable design—up to two expanders per multiplexer for maximum 18 banks
• Mixed impedance support with E1473A (50-ohm expanders) and E1472A/E1474A multiplexers
• Flexible mounting: adjacent VXI slot or external up to 8 meters via extension cables
• SCPI command control for programmable switching
• Relay control via 5V, 12V, or 24V supplied through parent multiplexer module
– Typical Applications
• Video signal routing and matrix switching
• Multi-channel telecommunications test configurations
• RF component characterization with reduced cable delay and insertion loss
• Distributed test setups with external probe placement near device under test
– Compatibility & Integration
Requires connection to E1472A (50-ohm) or E1474A (75-ohm) RF multiplexer within the same VXI system. Operates within mixed-impedance architectures alongside the E1473A (50-ohm expander). External mounting capability minimizes signal path length for applications requiring proximity to the device under test.
