Custom Arb Waveform Generator

Working with User-Defined Setups (Modes)-Custom Arb Only

Selecting a Custom ARB Setup or a Custom Digital Modulation State

1.Preset the signal generator: press Preset.

2.Press Mode > Custom > Arb Waveform Generator > Setup Select.

3.Select either:

one of the predefined modulation setups: NADC, PDC, PHS, GSM, DECT, EDGE, APCO 25 w/C4FM, APCO 25 w/CQPSK, CDPD, PWT, or TETRA

This selects a predefined setup where filtering, symbol rate, and modulation type are defined by the predefined modulation setup (mode) that you selected and returns you to the top- level custom modulation menu; it does not include bursting or channel coding.

or

Custom Digital Mod State

This selects a custom setup stored in the Catalog of DMOD Files (see page 144 for information on creating a custom digital modulation setup).

Working with User-Defined Setups (Modes)Custom Arb Only

Modifying a Single-Carrier NADC Setup

In this procedure, you learn how to start with a single- carrier NADC digital modulation and modify it to a custom waveform with customized modulation type, symbol rate, and filtering.

1.

Press Preset.

2.

Press Mode > Custom > ARB Waveform Generator > Setup Select > NADC.

3.

Press Digital Mod Define > Modulation Type > PSK > QPSK and OQPSK > QPSK.

4.Press Symbol Rate > 56 > ksps.

5.Press Filter > Select > Nyquist.

6.Press Return > Return > Digital Modulation Off On.

This generates a waveform with the custom single- carrier NADC digital modulation state. The display changes to Dig Mod Setup: NADC (Modified). During waveform generation, the DIGMOD and I/Q annunciators appear and the custom single- carrier digital modulation state is stored in volatile memory.

7.Set the RF output frequency to 835 MHz.

8.Set the output amplitude to 0 dBm.

9.Press RF On/Off.

The user- defined NADC signal is now available at the RF OUTPUT connector.

10.Press Return > Return.

This returns to the top- level Digital Modulation menu, where Digital Modulation Off On is the first softkey.

144

Chpater 6

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Agilent Technologies E8267D PSG manual Working with User-Defined Setups Modes−Custom Arb Only, Custom Digital Mod State

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.