Agilent Technologies N6700 Modular Power System: An Overview

The Agilent Technologies N6700 (now part of the Keysight Technologies portfolio) represents a cornerstone in automated test equipment, specifically designed for applications requiring high-density, flexible DC power. The N6700 series is a 1U-high, modular power system that integrates multiple power supplies into a single, compact mainframe, making it an ideal solution for ATE (Automated Test Equipment) systems where rack space is at a premium.

Design Philosophy and Architecture

The primary advantage of the N6700 series is its highly modular architecture. Unlike traditional, fixed-output power supplies, the N6700 allows users to mix and match power modules based on specific voltage, current, and performance requirements. The system consists of two main components: the mainframe and the individual power modules.

The mainframes are available in three different power levels (400W, 600W, and 1200W), and each supports up to four output modules. This "building block" approach ensures that engineers can configure a system that precisely matches their test bench needs without paying for unnecessary capabilities or occupying excessive space.

Performance and Application

The N6700 series is categorized into various performance levels to cater to diverse industrial needs. Basic modules provide cost-effective solutions for general-purpose applications, such as powering a Device Under Test (DUT) or providing bias voltage. Conversely, high-performance modules offer rapid output response, high-precision measurement, and programmable output impedance, which are critical for characterizing complex electronic components like mobile phone power amplifiers or automotive sensors.

One of the most notable features of the N6700 is its capability to emulate battery behavior. In modern electronics development, particularly in IoT and mobile devices, understanding how a circuit performs under varying battery conditions is vital. The N6700 modules can be programmed to simulate the internal resistance of a real battery, allowing designers to conduct realistic life-cycle and stress tests on their products.

Integration in Automated Test Systems

In a production or R&D setting, the N6700 is designed to communicate efficiently with computer controllers. By utilizing standard SCPI (Standard Commands for Programmable Instruments) commands, the system allows for rapid test sequence automation. The LXI (LAN eXtensions for Instrumentation) compliance ensures that the system is compatible with modern network architectures, allowing for remote monitoring and control across different locations.

Reliability and Maintenance

Because the N6700 is often deployed in 24/7 manufacturing environments, reliability is paramount. The modular design simplifies maintenance; if a single module fails, it can be replaced individually without needing to remove the entire mainframe from the rack or decommission the entire system. This significantly reduces downtime and lowers the total cost of ownership over the lifecycle of the test station.

Conclusion

The Agilent N6700 Modular Power System remains a standard in the industry due to its versatility, compact size, and wide range of module options. By consolidating multiple power supplies into a single, manageable chassis, it streamlines the complexity of test racks and offers engineers the precision and reliability required for both early-stage design validation and final production testing. Whether used for basic voltage sourcing or complex battery simulation, the N6700 platform continues to be a versatile solution for modern power electronics requirements.