HP / Agilent 54751A 20 GHz dual channel electrical module

The HP/Agilent 54751A is a dual-channel electrical module for high-frequency signal acquisition up to 20 GHz. This plug-in module installs into compatible Agilent/Keysight mainframe oscilloscopes to enable precise measurement of fast transient and periodic signals across communications, semiconductor, and signal-integrity applications. User-selectable bandwidth (12.4 GHz or 20 GHz per channel) balances measurement speed against noise performance, with rise times as low as 17.5 ps in high-bandwidth mode.

## Technical Specifications

• **Channels:** 2
• **Bandwidth:** 12.4 GHz (low) or 20 GHz (high) per channel, DC-coupled
• **Rise Time:** ≤17.5 ps (high BW) / ≤28.2 ps (low BW)
• **Vertical Resolution:** 12 bits standard; 15 bits with averaging
• **Vertical Accuracy:** 0.4% of full-scale or marker reading (greater of the two) ± 2 mV ± 1.2% of (reading – channel offset)
• **Noise (RMS):** ≤1 mV (high BW) / ≤0.5 mV (low BW); reduces to ~50 µV or ~25 µV with averaging
• **Sensitivity Range:** 1 mV/div to 100 mV/div
• **Dynamic Range:** ±400 mV relative to channel offset
• **Trigger Channel Bandwidth:** 2.5 GHz internal; up to 18 GHz with HP 54118A
• **External Trigger Bandwidth:** 2.5 GHz or 12 GHz selectable
• **Trigger Modes:** Normal and High Sensitivity (hysteresis off)
• **Trigger BW Limit:** ~100 MHz low-pass filter
• **Attenuation Scaling:** 0.0001:1 to 1,000,000:1 configurable
• **Connectors:** 3.5 mm and SMA (male)

## Key Features

• Independent bandwidth selection per channel optimizes noise vs. fidelity tradeoff
• 12-bit ADC expandable to 15-bit via averaging reduces measurement uncertainty
• Configurable scale factors from 1 mV/div in fine 0.1 mV increments or standard 1-2-5-10 sequence
• Two-wide module configuration supports up to four total channels in HP 54750A

## Compatibility & Integration

The 54751A installs into:

• HP/Agilent 54750A High-Bandwidth Digitizing Oscilloscope Mainframe
• Agilent 83480A Digital Communications Analyzer Mainframe
• Agilent/Keysight 86100A/B/C Infiniium DCA/DCA-J Mainframes