7 Custom Real Time I/Q Baseband

In the following sections, this chapter describes the custom real- time I/Q baseband mode, which is available only in E8267D PSG vector signal generators with Option 601 or 602:

•“Overview” on page 165

•“Working with Predefined Setups (Modes)” on page 165

•“Working with Data Patterns” on page 166

•“Working with Burst Shapes” on page 171

•“Configuring Hardware” on page 175

•“Working with Phase Polarity” on page 177

•“Working with Differential Data Encoding” on page 177 See also: Chapter 3, “Basic Digital Operation,” on page 71

Overview

Custom Real Time I/Q Baseband mode can produce a single carrier, but it can be modulated with real time data that allows real time control over all of the parameters that affect the signal. The single carrier signal that is produced can be modified by applying various data patterns, filters, symbol rates, modulation types, and burst shapes.

To begin using the Custom Real Time I/Q Baseband mode, start by selecting from a set of predefined modes (setups) or specify a setup by selecting a Data Pattern, Filter, Symbol Rate, Modulation Type, Burst Shape, Configure Hardware, Phase Polarity, and whether Diff Data Encode is off or on.

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.

Selecting a Predefined Real Time Modulation Setup

The following steps select a predefined mode where filtering, symbol rate, and modulation type are defined by the APCO 25 w/C4FM digital modulation standard, and return to the top- level custom modulation menu.

1.Press Preset.

2.Press Mode > Custom > Real Time I/Q Baseband.

3.Press More (1 of 3) > More (2 of 3) > Predefined Mode > APCO 25 w/C4FM.

4.Press More (3 of 3).

Chapter 7

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Agilent Technologies E8257D PSG manual Custom Real Time I/Q Baseband, Selecting a Predefined Real Time Modulation Setup
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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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