Custom Arb Waveform Generator

Basic Digital Operation

Arbitrary (ARB) Waveform File Headers

The signal generator’s Arb Waveform Generator mode is designed for out- of- channel test applications. This mode can be used to generate data formats that simulate random communication traffic and can be used as a stimulus for component testing. Other capabilities of the Arb Waveform Generator mode include:

configuring single or multicarrier signals. Up to 100 carriers can be configured.

creating waveform files using the signal generator’s front panel interface.

The waveform files, when created as random data, can be used as a stimulus for component testing where device performance such as adjacent channel power (ACP) can be measured. The AUTOGEN_WAVEFORM file that is automatically created when you turn the Arb Waveform Generator on can be renamed and stored in the signal generator’s non- volatile memory. This file can later be loaded into volatile memory and played using the Dual ARB waveform player.

For more information, refer to the sections “Using the Dual ARB Waveform Player” on page 83 and “Modes of Operation” on page 5.

Custom Real Time I/Q Baseband

The real- time mode simulates single- channel communication using user- defined modulation types along with custom FIR filters, and symbol rates. Data can be downloaded from an external source into PRAM memory or supplied as real time data using an external input. The Real Time I/Q Baseband mode can also generate pre- defined data formats such as PN9 or FIX4. A continuous data stream generated in this mode can be used for receiver bit error analysis. This mode is limited to a single carrier. The Real Time I/Q Baseband mode:

has more data and modulation types available than the Arb Waveform Generator mode.

supports custom I/Q constellation formats.

has the capability to generate continuous PN sequences for bit error rate testing (BERT).

needs no waveform build time when signal parameters are changed.

For more information, refer to the custom arb section “Overview” on page 143, the custom real time section “Overview” on page 165 and the section on “Digital Modulation” on page 6.

Arbitrary (ARB) Waveform File Headers

An ARB waveform file header enables you to save instrument setup information (key format settings) along with a waveform. When you retrieve a stored waveform, the header information is applied so that when the waveform starts playing, the dual ARB player is set up the same way each time.

Headers can also store a user- specified 32- character description of the waveform or sequence file.

A default header is automatically created whenever a waveform is generated, a waveform sequence is created, or a waveform file is downloaded to the PSG (for details on downloading files, see the E8257D/67D PSG Signal Generators Programming Guide).

The following signal generator settings are saved in a file header:

•ARB sample clock rate

•Runtime scaling (only in the dual ARB player)

Chapter 3

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.

Agilent Technologies E8267D PSG, E8257D PSG manual Arbitrary ARB Waveform File Headers

Models: E8267D PSG E8257D PSG