Analog Modulation

Configuring Pulse Modulation (Option UNU/UNW)

The signal generator is now configured to output a 0 dBm, phase- modulated carrier at 3 GHz with a 0.25 p radian deviation and 10 kHz rate. The shape of the waveform is a sine wave. (Notice that sine is the default for the ΦM Waveform softkey. Press More (1 of 2) to see the softkey.)

To Activate ΦM

1.Press ΦM Off On.

2.Press RF On/Off.

The ΦM and RF ON annunciators are now displayed. This indicates that you have enabled phase modulation and the signal is now being transmitted from the RF OUTPUT connector.

Configuring Pulse Modulation (Option UNU/UNW)

In this example, you will learn how to create a gated, pulse- modulated RF carrier with an external trigger.

To Set the RF Output Frequency

1.Press Preset.

2.Press Frequency > 2 > GHz.

To Set the RF Output Amplitude

Press Amplitude > 0 > dBm.

To Set the Pulse Period, Width, and Triggering

1.Press Pulse > Pulse Period > 100 > usec.

2.Press Pulse > Pulse Width > 24 > usec.

3.Press Pulse > Pulse Source > Int Gated.

4.Connect a TTL signal to the Trigger In connector on the rear panel of the signal generator. To configure the trigger signal polarity, Press Utility > Instrument Adjustments > Signal Polarity Setup > Trigger In Polarity.

The signal generator is now configured to output a 0 dBm, pulse- modulated carrier at 2 GHz with a 100- microsecond pulse period and 24- microsecond pulse width. The pulse source is set to internal gated. (Notice that Internal Free Run is the default for the Pulse Source softkey.)

To Activate Pulse Modulation

Follow these remaining steps to output the pulse- modulated signal.

1.Press Pulse Off On to On.

2.Press RF On/Off.

The Pulse and RF ON annunciators are now displayed. This indicates that you have enabled pulse modulation and the signal is now being transmitted from the RF OUTPUT connector. The TTL trigger signal state will control pulse modulation output.

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Chapter 5

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Agilent Technologies E8267D PSG Configuring Pulse Modulation Option UNU/UNW, To Activate ΦM, To Activate Pulse Modulation
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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.

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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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