The HP/Agilent 54121A is a four-channel test set that expands the measurement capabilities of the HP 54120B digitizing oscilloscope mainframe. It enables simultaneous acquisition and analysis of up to four signals across DC to 20 GHz, making it well-suited for high-speed digital and microwave applications demanding precise signal characterization.
## Technical Specifications
• Bandwidth: DC to 20 GHz
• Channels: 4 input channels
• Vertical Sensitivity: 1 mV/div to 80 mV/div
• Rise Time: 17.5 ps
• Input Impedance: 50 ohm
• Maximum Input Voltage: ±2 Vdc + peak; +16 dB ac
• Input Connectors: 3.5 mm (m)
## Key Features
• Four independent high-speed input channels for parallel signal acquisition
• Picosecond-level rise time (17.5 ps) resolves fast transient events
• DC-coupled operation with AC option via 16 dB pad
• 50 ohm input matching for RF/microwave measurements
• Fine vertical resolution from 1 mV/div, accommodating low-level signals
## Typical Applications
The 54121A serves digital and microwave test environments requiring multi-channel synchronous sampling. Typical use includes characterization of high-speed digital signals, microwave pulse analysis, and RF transient capture where four simultaneous channels and sub-20-ps timing resolution are critical.
## Compatibility & Integration
The 54121A is designed exclusively for the HP 54120B mainframe, forming the HP 54121T system when combined. The test set includes RF accessory kit (HP 54121-68701), five APC-3.5 (f-f) connector savers, five SMA (m) coaxial shorts, and an anti-static mat with wrist strap. Note that if separated from its original mainframe, DC accuracy specifications for single and dual voltage markers may shift and require recalibration to restore factory performance.
