Keysight / Agilent / HP E1473A RF Multiplexer Expander

The Keysight E1473A is a C-size, 1-slot VXI RF multiplexer expander module that extends the switching capacity of E1472A or E1474A master multiplexers in automated test systems. It provides six 1×4 multiplexer banks with relay-based channel selection, enabling dense RF signal routing from DC to 1.3 GHz. Up to two E1473A expanders can be connected to a single master multiplexer, yielding a total of eighteen 1×4 banks. The module integrates within a VXI mainframe or mounts remotely up to 8 meters away using optional extender cables, reducing test cable length and insertion loss to the device under test.

– Technical Specifications

• Switching Frequency: Up to 1.3 GHz
• Impedance: 50 Ω
• Connectors: High-performance SMB male
• Insertion Loss:
– <0.1 dB (<10 MHz)
– <0.4 dB (<100 MHz)
– <0.9 dB (<500 MHz)
– <1.5 dB (<1.3 GHz)
– <8.0 dB typical (<3 GHz)
• Crosstalk (channel-to-channel):
– <–90 dB (<10 MHz)
– <–80 dB (<100 MHz)
• Maximum Thermal Offset: 6 µV DC
• Closed Channel Resistance: 10⁸ Ω (between any two terminals)
• Maximum Voltage/Current: 42 V, 1 A

– Key Features

• Register-based VXI architecture with tree-switched relay configuration for high isolation and low VSWR
• Six independent 1×4 multiplexer banks per module
• Non-latching armature relays with default channel assignments at power-on/reset
• Remote extender capability: up to 10 cables daisy-chained; P/N E1473-80002 Cable Extension Kit includes two 0.8 m cables
• 50 Ω impedance with controlled insertion loss across DC to 1.3 GHz operating range

– Compatibility & Integration

The E1473A requires a master E1472A (50 Ω) or E1474A (75 Ω) multiplexer. Mixed-impedance configurations are supported with E1475A (75 Ω) expanders across E1472A and E1474A systems. VXI instrument drivers are available for control and automation.