Basic Digital Operation

Using Waveform Scaling

Although scaling maintains the basic shape of the waveform, too much scaling can compromise its integrity because the bit resolution can be so low that the waveform becomes corrupted with quantization noise. Maximum accuracy and optimum dynamic range are achieved by scaling the waveform just enough to remove the DAC over- range error. Optimum scaling varies with waveform content.

Scaling a Currently Playing Waveform (Runtime Scaling)

This procedure enables you to make real- time scaling adjustments to a currently playing waveform. This type of scaling does not affect the waveform file and is well suited for eliminating DAC over- range errors.

1.Press Preset > Mode > Custom > Arb Waveform Generator > Digital Modulation Off On to On. This generates a custom arbitrary waveform for use in this procedure. You can also use a previously stored or downloaded waveform.

2.Press Mode > Dual ARB > Select Waveform and ensure that AUTOGEN_WAVEFORM is highlighted on the display. AUTOGEN_WAVEFORM is the default name assigned to the waveform you generated in the previous step.

3. Press Select Waveform. This selects the waveform and returns you to the previous softkey menu.

4.Press ARB Off On to On. This plays the selected waveform.

5.Press ARB Setup > More (1 of 2) > Waveform Runtime Scaling and adjust the front panel knob or use the number keys to enter a new value. The new scaling value is instantly applied to the playing waveform. Runtime scaling adjustments are not cumulative, as the values are always relative to original amplitude of the waveform file.

Scaling a Waveform File in Volatile Memory

This procedure enables you to permanently scale a waveform file. You can then store the scaled waveform segment to non- volatile memory for future use. Scaling is cumulative and non- reversible.

1.Press Preset > Mode > Custom > Arb Waveform Generator > Digital Modulation Off On to On. This generates a custom arbitrary waveform for use in this procedure. You can also use a previously stored or downloaded waveform.

2.Press Mode > Dual ARB > Select Waveform and ensure that AUTOGEN_WAVEFORM is highlighted on the display. AUTOGEN_WAVEFORM is the default name assigned to the waveform you generated in the previous step.

3. Press Select Waveform. This selects the waveform and returns you to the previous softkey menu.

4. Press ARB Setup > Waveform Utilities and ensure that AUTOGEN_WAVEFORM is highlighted on the display.

5.Press Scale Waveform Data > Scaling > 70 > % > Apply to Waveform. The waveform is now reduced to 70 percent of its original amplitude. Once this type of scaling is applied to the waveform it cannot be undone. Repeated scaling applications have a cumulative effect on the waveform.

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Chapter 3

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Agilent Technologies E8267D PSG, E8257D PSG manual Scaling a Currently Playing Waveform Runtime Scaling
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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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