Custom Arb Waveform Generator

Working with Filters

To Create a User-Defined FIR Filter with the FIR Values Editor

In this procedure, you use the FIR Values editor to create and store an 8- symbol, windowed, sinc function filter with an oversample ratio of 4. The Oversample Ratio (OSR) is the number of filter coefficients per symbol.

You can define from 1 to 32 FIR coefficients, where the maximum combination of symbols and oversample ratio is 1024 coefficients.

The FIR Values editor allows a maximum filter length of 1024 coefficients, but the PSG hardware is limited to 512 symbols for arbitrary waveform generation, and 64 symbols for real- time waveform generation. The number of symbols equals the number of coefficients divided by the oversample ratio. If you enter more than the maximum number of symbols, the PSG cannot use the filter; it decimates the filter (throws away coefficients) until the required condition is met and then uses the filter, but fine resolution may be lost from the impulse response.

1.Press Preset.

2.Press Mode > Custom > Arb Waveform Generator > Digital Mod Define > Filter or

Mode > Custom > Real Time I/Q Baseband > Filter

3.Press Define User FIR > More (1 of 2).

4.Press Delete All Rows > Confirm Delete Of All Rows > More (2 of 2).

This brings up the FIR Values editor and clears the table of existing values.

5. Press Edit Item.The Value field for coefficient 0 should be highlighted.

6.Use the numeric keypad to type the first value (−0.000076) from the following table and press Enter. As you press the numeric keys, the numbers are displayed in the active entry area. (If you make a mistake, you can correct it using the backspace key.) Continue entering the coefficient values from the table until all 16 values have been entered.

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Agilent Technologies E8267D PSG, E8257D PSG manual Chpater
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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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