6 Custom Arb Waveform Generator

In the following sections, this chapter describes the custom arbitrary waveform generator mode, which is available only in E8267D PSG vector signal generators with Option 601 or 602:

•“Overview” on page 143

•“Working with Predefined Setups (Modes)” on page 143

•“Working with Filters” on page 146

•“Working with Symbol Rates” on page 153

•“Working with Modulation Types” on page 155

•“Configuring Hardware” on page 162

See also: Chapter 3, “Basic Digital Operation,” on page 71

Overview

Custom Arb Waveform Generator mode can produce a single modulated carrier or multiple modulated carriers. Each modulated carrier waveform must be calculated and generated before it can be output; this signal generation occurs on the internal baseband generator (Option 601 or 602). Once a waveform has been created, it can be stored and recalled which enables repeatable playback of test signals.

To begin using the Custom Arb Waveform Generator mode, select whether to create a single modulated carrier or a multiple modulated carrier waveform:

•If you want to create a single modulated carrier waveform, start by selecting a Digital Modulation Setup from a set of predefined modes (setups). Once a predefined mode is selected, you can modify the Modulation Type, the Filter being used, the Symbol Rate, and the type of Triggering; the Data Pattern is random by default. This modified setup can then be stored and reused.

•If you want to create a multiple modulated carrier waveform, start by selecting a Multicarrier Setup from a set of predefined modes (setups). Once a predefined mode is selected, you can modify the number of carriers to be created, the frequency spacing between each carrier, whether the phase offset between each carrier is to be fixed or random, and the type of Triggering; the Data Pattern is random by default, the Filter is set to 40 MHz by default, and the Symbol Rate is automatically specified by the selected Modulation Type being used.

Working with Predefined Setups (Modes)

When you select a predefined mode, default values for components of the setup (including the filter, symbol rate, and modulation type) are automatically specified.

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Agilent Technologies E8257D PSG, E8267D PSG manual Overview, Working with Predefined Setups Modes
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E8267D PSG, E8257D PSG specifications

Agilent Technologies, a recognized leader in electronic measurement and communications solutions, offers a comprehensive range of signal generators, including the E8257D PSG (Pulsed Signal Generator) and E8267D PSG. These instruments are engineered to meet the demanding requirements of wireless communication, aerospace, defense, and various research applications.

The E8257D PSG is known for its versatility and reliability. It operates within a frequency range of 250 kHz to 40 GHz, making it suitable for a wide array of applications, from signal generation to vector modulation. With an output power capability of up to +30 dBm, it delivers high-quality signals with exceptional precision. Its low phase noise performance is especially critical for applications such as radar and communication system testing, where signal integrity is paramount.

One of the standout features of the E8257D is its advanced modulation capabilities, including analog and digital modulation schemes. This flexibility allows engineers to simulate real-world communications environments accurately. The PSG also features a built-in arbitrary waveform generator that enables users to create complex waveforms tailored to specific testing needs, providing a significant advantage in research and development.

On the other hand, the Agilent E8267D PSG is designed to cater to the needs of users requiring a combined signal generation and analysis solution. With the capability to generate signals from 250 kHz to 67 GHz, the E8267D is ideal for millimeter-wave applications, as well as testing next-generation wireless technologies.

This model includes features such as enhanced phase noise performance and faster switching speed, which are crucial for signal integrity in sophisticated networks. The instrument's intuitive user interface and powerful software integration facilitate effortless operation and automation, thereby improving workflow efficiency.

Both the E8257D and E8267D PSG instruments incorporate cutting-edge technologies such as low-noise microwave and RF components, as well as digital signal processing capabilities. They provide users with enhanced accuracy and reliability in their measurements.

In summary, Agilent Technologies' E8257D and E8267D PSG signal generators represent the pinnacle of precision in signal generation technology. With their extensive feature sets, advanced modulation capabilities, and robust performance specifications, these instruments are invaluable tools for engineers and researchers working across various high-tech industries.
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