Agilent/Keysight N4880A

The N4880A is a reference clock multiplier that synchronizes pattern generators in high-speed digital communication test systems to external clock signals with precise jitter tolerance control. Designed for R&D and manufacturing validation of PCI Express, MIPI M-PHY, and SD card UHS-II devices, it locks compatible BERT systems to a system reference clock, enabling accurate receiver characterization and standards compliance verification.

Technical Specifications

Clock Multiplication and Synchronization

• Multiplies reference clock frequencies including 19.2 MHz, 26–52 MHz, and 100 MHz


• Multiplying phase-locked loop with selectable bandwidth: 2 MHz to 5 MHz


• Transparent to 33 kHz spread spectrum clocking on reference inputs


• Tolerates low-frequency jitter within PLL loop bandwidth


• Differential input sensitivity: 100 mVpp Supported Standards


• PCI Express 1.0, 2.0, 3.0


• MIPI M-PHY (gear 1–3)


• SD card UHS-II Power and Environmental


• Maximum power consumption: 80 VA


• Input: Single-phase AC 100–240 V, 50–60 Hz (auto-selecting power supply)


• Operating temperature: 5–40 °C


• Maximum relative humidity: 95%


• Altitude: Up to 2000 meters


• Indoor use, installation category II, pollution degree 2

Key Features

• Three 3.5 mm SMA female connectors (two differential inputs, one output)


• Standalone graphical user interface with USB remote control


• Software revision 7.20 or later required for remote operation


• Safety Class 1 with protective earth terminal

Typical Applications Jitter tolerance testing and receiver compliance validation for high-speed serial interfaces in chipset and host device development.

Compatibility & Integration Primarily designed for use with Agilent/Keysight J-BERT N4903B and ParBERT 81250A pattern generators.