Custom Real Time I/Q Baseband

Working with Burst Shapes

User-Defined

ValuesUser-Defined

Values

 

1

 

 

 

Power

Rise

Rise

Fall

Fall

Delay

Time

Delay

Time

0

 

 

 

 

 

 

 

 

Time

 

 

 

Burst shape maximum rise and fall time values are affected by the following factors:

•the symbol rate

•the modulation type

When the rise and fall delays equal 0, the burst shape attempts to synchronize the maximum burst shape power to the beginning of the first valid symbol and the ending of the last valid symbol.

If you find that the error vector magnitude (EVM) or adjacent channel power (ACP) increases when you turn bursting on, you can adjust the burst shape to assist with troubleshooting.

Configuring the Burst Rise and Fall Parameters

1.Press Preset.

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

3.Press Rise Time > 5 > bits.

4.Press Rise Delay > 1 > bits.

5.Press Fall Time > 5 > bits.

6.Press Fall Delay > 1 > bits.

This configures the burst shape for the custom real- time I/Q baseband digital modulation format. For instructions on creating and applying user- defined burst shape curves, see “To Create and Store User- Defined Burst Shape Curves” on page 173.

Using User-Defined Burst Shape Curves

You can adjust the shape of the rise time curve and the fall time curve using the Rise Shape and Fall Shape editors. Each editor enables you to enter up to 256 values, equidistant in time, to define the shape of the curve. The values are then resampled to create the cubic spline that passes through all of the sample points.

The Rise Shape and Fall Shape editors are available for custom real- time I/Q baseband generator waveforms. They are not available for waveforms generated by the dual arbitrary waveform generator.

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Chapter 7

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Agilent Technologies E8267D PSG Configuring the Burst Rise and Fall Parameters, Using User-Defined Burst Shape Curves
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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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