Digitizer Input Model

Three-Wire Connections

Figure 1-8 shows the input model for the digitizer. Maximum voltage between Low and Guard is 5V. Exceeding this limitation will not damage your digitizer but will generate invalid data for any measurement taken.

In general, 3-Wire cabling is recommended, but 2-Wire cabling is supported for some switching applications.

Figure 1-8. Digitizer Input Model

This section shows two examples of connecting the input using a three-wire connection. Both example connections can be made using shielded, twisted-pair connectors.

For the first example, Figure 1-9 shows one way to make connections for a bridge measurement where the L-to-G voltage is £ 5V and the L-to-G voltage exceeds 5V. A “Wagner ground” is used to satisfy the L-to-G restriction of £ 5V and to make a Guard connection point that minimizes measurement error due to the digitizer’s injected current. A capacitor is added to the Wagner ground to provide a signal path to ground to minimize common mode voltages.

For the second example, Figure 1-10 shows one way to measure the voltage across a small current sensing resistor where the input to the digitizer is switched through a multiplexer switch module.

Figure 1-9. Example: Three-Wire Connections (Bridge)

Chapter 1

Configuring the Digitizer Modules 25

Page 24 Page 26
Page 25
Image 25
Agilent Technologies E1563A, E1564A user manual Digitizer Input Model Three-Wire Connections
Page 24 Page 26

E1563A, E1564A specifications

Agilent Technologies, a prominent player in the field of electronic measurement, offers a range of products designed for various testing applications. Among their notable offerings are the E1564A and E1563A modules. Both models are designed for high-performance testing and measurement, catering particularly to the needs of engineers and technicians in the telecommunications and wireless industries.

The Agilent E1564A is a high-speed data and synchronization generation module, specifically tailored for advanced signal analysis. One of its primary features is its ability to provide a wide range of modulation types, including QPSK and 16QAM, which are essential for testing modern communication systems. The module also boasts a flexible output that supports multiple channels, making it efficient for testing complex systems where multiple data streams are present. Its exceptional performance in generating accurate waveforms enables engineers to perform thorough tests and validations on their devices.

On the other hand, the E1563A module is predominantly focused on protocol analysis and provides engineers with insights into the behavior of their communication systems. This module features comprehensive support for various communication protocols, making it invaluable when debugging and validating designs. Engineers can utilize the extensive measurement capabilities of the E1563A to analyze data integrity and system performance, ensuring that their products meet required specifications.

Both modules leverage advanced technologies from Agilent, ensuring high accuracy and reliability in measurements. They are equipped with powerful processing capabilities that allow for real-time data analysis, a critical aspect when working with high-frequency signals. Furthermore, these modules are designed for seamless integration into Agilent’s test and measurement platforms, enhancing usability and facilitating complex testing scenarios.

In summary, the Agilent E1564A and E1563A modules represent cutting-edge solutions for engineers involved in testing and validating communication systems. With their robust features, including support for various modulation schemes and protocol analysis, these modules enable efficient and accurate measurements. The commitment to quality and precision from Agilent Technologies continues to make these devices essential tools in the industry, helping engineers push the boundaries of innovation in telecommunications.
Top Page Image Contents