10 AWGN Waveform Generator

In the following sections, this chapter contains examples for using the AWGN waveform generator, which is available only in E8267D vector PSGs with Options 601 or 602 and Option 403:

•“Arb Waveform Generator AWGN” on page 201

•“Real Time I/Q Baseband AWGN” on page 202

For adding real- time AWGN to waveforms using the Dual ARB player, see “Adding Real- Time Noise to a Dual ARB Waveform” on page 86

Configuring the AWGN Generator

The AWGN (additive white Gaussian noise) generator is available for the Arb Waveform Generator mode and the Real Time I/Q Baseband mode. The AWGN generator can be configured with user- defined noise bandwidth, noise waveform length, and noise seed parameters.

•Bandwidth – the noise bandwidth can be set from 50 kHz to 15 MHz.

•Waveform Length – the waveform length is the length in samples of the noise waveform. Longer waveform lengths provide more statistically correct noise waveforms.

•Noise Seed – the noise seed selection can be either random or fixed. The noise seed determines whether the noise waveform data is repeatable (using the fixed selection) or random (using the random selection).

When the AWGN generator is active, an annunciator, labeled AWGN, is displayed on the front panel of the signal generator.

Arb Waveform Generator AWGN

1.Press Preset.

2.Press Mode > More (1 of 2) > AWGN > Arb Waveform Generator AWGN

3.Press Bandwidth > 1.25 > MHz.

4.Press Waveform Length > 131072.

5.Press Noise Seed Fixed Random until Random is highlighted.

This configures a randomly seeded AWGN waveform with a bandwidth of 1.25 MHz and a waveform length of 131072 bits.

Configuring the RF Output

1.Set the RF output frequency to 500 MHz.

2.Set the output amplitude to −10 dBm.

3.Press RF On/Off.

Chapter 10

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Agilent Technologies E8257D PSG Configuring the Awgn Generator, Arb Waveform Generator Awgn, Configuring the RF Output
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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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