The Keysight DAQM905A is a 2 GHz dual 1:4 RF multiplexer module for signal routing and switching in automated test systems. It provides two independent 1:4 multiplexers with 50 Ohm impedance, enabling versatile RF signal management for high-frequency and pulsed signals across four channels per bank. The module integrates directly into Keysight DAQ970A and DAQ973A mainframes and supports cascading configurations up to 16:1 multiplexer arrays.
Technical Specifications
• Bandwidth: 2 GHz (direct connection); 1 GHz (with SMB-to-BNC adapter cables)
• Impedance: 50 Ohm
• Configuration: Dual 1:4 RF multiplexer
• Channels: 4 per bank (8 total)
• Switching Voltage: Up to 42 V
• Current Rating: 0.7 A
• Scan Rate: 60 channels/sec
• Maximum Transients: 0 Vpk referenced to earth
• Connectors: SMB inputs
– Key Features
• Two independent banks operate as 4-to-1 multiplexers with “tree” structure architecture for high isolation and low VSWR
• Channels organized for one active connection per bank; closing a new channel automatically opens the previous one
• One channel per bank permanently connected to COM
• Both banks share common earth ground
• 10 × 50 Ohm SMB-to-BNC adapter cables included
• Non-scanning module operation; channel control available through alarm conditions on scanning modules
• Does not interface with internal DMM of mainframe
– Typical Applications
• Multi-channel RF signal routing in production test environments
• Pulsed signal switching and management
• Automated test systems requiring flexible signal multiplexing
• Cascaded multiplexer configurations for expanded channel capacity
– Compatibility & Integration
The DAQM905A plugs directly into Keysight DAQ970A and DAQ973A mainframes. Multiple units cascade to create larger multiplexer matrices. The module operates as a standalone switching unit independent of the mainframe’s internal measurement subsystems.
