The Keysight/Agilent/HP 54121A is a four-channel test set designed to extend the capabilities of the 54120B digitizing oscilloscope mainframe. It enables simultaneous acquisition and analysis of multiple high-frequency signals across all four independent channels, supporting characterization of complex RF and microwave devices and systems.
Technical Specifications
• Bandwidth: DC to 20 GHz
• Channels: 4 input channels
• Vertical Sensitivity: 1 mV/div to 80 mV/div
• Risetime: 17.5 ps
• Input Impedance: 50 ohm
• Maximum Input Voltage: ±2 Vdc + peak, +16 dB ac
• Input Connectors: 3.5 mm (male)
– Key Features
• Four independent 50 ohm input channels with 3.5 mm connectors optimized for RF/microwave measurements
• Ultra-fast 17.5 ps risetime resolves transient details in high-speed digital and analog circuits
• Wide vertical range from 1 mV/div to 80 mV/div accommodates both small-signal and moderate-amplitude test signals
• DC to 20 GHz bandwidth enables characterization of contemporary high-frequency components and systems
– Typical Applications
• Multi-channel characterization of RF and microwave device performance
• Simultaneous measurement of related signals in complex test scenarios
• High-speed digital signal integrity analysis requiring four-channel synchronization
• Component and system validation in telecommunications and aerospace applications
– Compatibility & Integration
The 54121A plugs directly into the 54120B mainframe to form the 54121T system. Comprehensive documentation includes the 54121A Four Channel Test Set Service Manual, the 54120T Programming Reference Manual covering both the 54120B and 54121A, and the 54120 series Getting Started Guide applicable to the 54120B, 54121A, and 54122A. The supplied RF Accessory Kit (HP 54121-68701) includes 20 dB attenuators, 50 ohm loads, coaxial shorts, and adapter cables for calibration and general-purpose RF work.
