Optimizing Performance

Adjusting Reference Oscillator Bandwidth (Option UNR/UNX)

Recalling and Applying a User Flatness Correction Array

Before performing the steps in this section, complete the section “Creating a User Flatness Correction Array with a mm- Wave Source Module” on page 128.

1. Press Preset.

2. Press Amplitude > More (1 of 2) > User Flatness > Configure Cal Array > More (1 of 2) > Preset List > Confirm Preset.

3.Press More (2 of 2) > Load/Store.

4.Ensure that the file FLATCAL2 is highlighted.

5.Press Load From Selected File > Confirm Load From File.

This populates the user flatness correction array with the data contained in the file FLATCAL2. The user flatness correction array title displays User Flatness: FLATCAL2.

6.Press Return > Flatness Off On.

This activates flatness correction using the data contained in the file FLATCAL2.

Adjusting Reference Oscillator Bandwidth (Option UNR/UNX)

The reference oscillator bandwidth (sometimes referred to as loop bandwidth) in signal generators with Option UNR/UNX (improved close- in phase noise < 1 kHz) is adjustable in fixed steps for either an internal or external 10 MHz frequency reference. The reference oscillator bandwidth can be set to 25, 55, 125, 300, or 650 Hz; models without Option UNR/UNX have a fixed reference oscillator bandwidth of about 15 Hz.

At frequency offsets below approximately 1 kHz, the stability and phase noise are determined by the internal or external frequency reference. At frequency offsets above 1 kHz, stability and phase noise are determined by the synthesizer hardware.

To optimize the overall phase noise performance of the signal generator for your particular application, make this adjustment depending on your confidence in the stability and phase noise of the external or internal reference versus the synthesizer hardware for various frequency offsets from the carrier.

To Select the Reference Oscillator Bandwidth

When using the internal timebase reference:

1.Press Utility > Instrument Adjustments > Reference Oscillator Adjustment > Internal Ref Bandwidth.

2.Select the desired bandwidth.

When using an external timebase reference:

1.Press Utility > Instrument Adjustments > Reference Oscillator Adjustment > External Ref Bandwidth.

2.Select the desired bandwidth.

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Chapter 4

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Agilent Technologies E8267D PSG Adjusting Reference Oscillator Bandwidth Option UNR/UNX, Press Return Flatness Off On
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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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