Chapter 4 Differences

Digital Signal Processor (DSP) Board

The DSP board replaces the Secondary Interface section of the A1 Main PC board. It replaces the Secondary Microprocessor (U504), the CV and CC programming DACs, Readback D/A, DAC Reference, Readback Comparators, and the Fan and Overvoltage PWMs. It replaces everything found in Figure 6-5, sheet 3 plus the OV filter/buffer (U603) found on sheet 2.

The DSP board contains the new Secondary Microprocessor circuits, the CV, CC, OV, OC and Fan DAC’s, The readback circuits and the secondary ROM and RAM. When operating in the Fixed mode, the instrument acts like a normal power supply with typical crossover characteristics between CV and CC operation. When in SAS mode the customer specified I/E operating curve is entered into the secondary RAM where it is used to modify the supply’s crossover characteristics.

Troubleshooting is to be performed in the Fixed (turn-on default) mode only. See Figure 6-10 for the A5J721/A5J722 connector DAC and Bias voltage pin-outs.

Note The DSP board is available as a replacement assembly only. It is not intended to be repaired to the component level.

The following figure is a simplified diagram that shows the circuits located on the DSP board (also referred to as the Secondary Interface) in relation to the Output Power and Control circuits previously discussed in chapter 4.

Service Addendum

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Agilent Technologies E4350B, E4351B service manual Digital Signal Processor DSP Board

E4351B, E4350B specifications

Agilent Technologies, a leader in electronic measurement, offers a range of advanced solutions, including the E4350B and E4351B switching systems. These models are specifically designed to meet the increasing demands of modern testing environments, providing high reliability and precision for a variety of applications.

The Agilent E4350B is known for its low resistance switching capabilities, making it an ideal choice for applications requiring accurate and repeatable measurements. It supports up to 16 channels of low resistance testing, allowing engineers to simulate complex electrical paths and identify potential issues in circuit designs. With an optional temperature measurement capability, users can monitor the thermal performance of components directly during tests.

On the other hand, the E4351B model enhances flexibility with a modular design, offering an extensive range of input and output configurations. This instrument is particularly well-suited for automated test systems, providing the ability to connect multiple devices and manage them seamlessly. Its high-speed switching technology enables quick toggling between channels, ensuring that large datasets can be acquired swiftly without compromising accuracy.

Both models employ advanced contact technology, which minimizes the potential for signal degradation, ensuring that users receive reliable data with minimal noise interference. This feature is crucial in applications where signal integrity is paramount, such as in research and development or quality assurance processes.

Enhanced user interfaces simplify operations for both novice and experienced technicians. The built-in touchscreen and intuitive navigation allow for easy setup and operation, significantly reducing the learning curve. Furthermore, the comprehensive software support provided by Agilent facilitates integration with various programming environments, allowing for custom test sequences tailored to specific needs.

Moreover, both E4350B and E4351B systems are built with durability in mind. The robust construction ensures long-term reliability, reducing downtime and maintenance costs. This makes them ideal candidates for both laboratory settings and field operations where consistent performance is critical.

In summary, Agilent Technologies’ E4350B and E4351B models are distinguished by their precision, flexibility, and robust performance. Their advanced features and user-friendly design make them suitable for a wide variety of applications, from routine testing to complex R&D projects. By leveraging modern switching technologies, these systems set a high standard for electronic measurement, aiding engineers in developing reliable electronic solutions.