Signal Generator Overview

Rear Panel

6. DIGITAL BUS

This is a proprietary bus used for Agilent Baseband Studio products, which require an E8267D with Options 003/004 and 601/602. This connector is not operational for general- purpose customer use. Signals are present only when a Baseband Studio option is installed (for details, refer to http://www.agilent.com/find/basebandstudio). The DIG BUS annunciator appears on the display when the Digital Bus is active (and the internal oven reference oscillator is not cold—OVEN COLD appears in this same location).

7. Q OUT

This female BNC connector (E8267D only) is used with an internal baseband generator

(Option 601/602) to output the analog, quadrature- phase component of I/Q modulation. On signal generators without Option 601/602, this female BNC connector is used to output the quadrature- phase component of an external I/Q modulation that has been fed into the Q input connector. The nominal output impedance of the Q OUT connector is 50 ohms, dc- coupled.

8. I OUT

This female BNC connector (E8267D only) is used with an internal baseband generator

(Option 601/602) to output the analog, in- phase component of I/Q modulation. On signal generators without Option 601/602, this female BNC connector is used to output the in- phase component of an external I/Q modulation that has been fed into the I input connector. The nominal output impedance of the I OUT connector is 50 ohms, dc- coupled.

9. WIDEBAND I INPUTS

These female SMA connectors: I IN (+) and I- bar IN (−) (Option 016 only) are used with differential wideband external I/Q inputs. They accept wideband AM and allow direct high–bandwidth analog inputs to the I/Q modulator in the 3.2−44 GHz range (frequency limit is dependant on the option). This input is not calibrated. The recommended input power level is −1 dBm with a +/− 1 VDC input voltage. The nominal impedance for this connector is 50 ohms.

The signal generator uses lowside mixing in the 20–28.5 GHz frequency range (Options 532 and 544), which reverses the phase relationship for I and Q signals. For internally generated I/Q signals the signal generator’s firmware compensates for this. However, for wideband external I/Q inputs (Option 016) there is no compensation and the I and Q inputs at the rear panel must be reversed to maintain the correct phase relationships in this frequency band. Refer to the Data Sheet and to the A37 Upconverter description in the Service Guide for more information.

For instruments with Option 015 (discontinued), single- ended wideband I/Q, there is a single BNC I input. The recommended power level at this input connector is 0 dBM.

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Agilent Technologies E8267D PSG, E8257D PSG manual Digital BUS, Out
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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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