5 Analog Modulation

In the following sections, this chapter describes the standard continuous waveform and optional analog modulation capability in Agilent E8257D PSG Analog and E8267D PSG Vector signal generators.

•“Analog Modulation Waveforms” on page 137

•“Configuring AM (Option UNT)” on page 138

•“Configuring FM (Option UNT)” on page 138

•“Configuring ΦM (Option UNT)” on page 139

•“Configuring Pulse Modulation (Option UNU/UNW)” on page 140

•“Configuring the LF Output (Option UNT)” on page 141

Analog Modulation Waveforms

Available standard internal waveforms include:

Sine

sine wave with adjustable amplitude and frequency

Dual- Sine

dual- sine waves with individually adjustable frequencies and a percent- of-

 

peak- amplitude setting for the second tone (available from function generator

 

only)

Swept- Sine

swept- sine wave with adjustable start and stop frequencies, sweep rate, and sweep

 

trigger settings (available from function generator only)

Triangle

triangle wave with adjustable amplitude and frequency

Ramp

ramp with adjustable amplitude and frequency

Square

square wave with adjustable amplitude and frequency

Noise

noise with adjustable amplitude generated as a peak- to- peak value (RMS value is

 

approximately 80% of the displayed value)

With Option UNT, the signal generator can modulate the RF carrier with amplitude, frequency, or phase modulation. Option UNT also provides low- frequency output capability.

With Option UNU, the signal generator can modulate the RF carrier with standard pulse modulation (150 ns minimum pulse width).

With Option UNW, the signal generator can modulate the RF carrier with narrow pulse modulation (20 ns minimum pulse width).

Chapter 5

137

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Agilent Technologies E8257D PSG, E8267D PSG manual Analog Modulation Waveforms
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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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