Troubleshooting

No Modulation at the RF Output

4. Turn the RF off: set RF On/Off to Off

5. Turn the signal generator’s automatic leveling control (ALC) off: press Amplitude > ALC Off On to Off.

6.Monitor the RF output amplitude as measured by the power meter.

7.Press Amplitude and adjust the signal generator’s RF output amplitude until the desired power is measured by the power meter.

Setting Power Search Mode

Power search mode executes a power search routine that temporarily activates the ALC, calibrates the power of the current RF output, and then disconnects the ALC circuitry. See the E8257D/67D PSG Signal Generators Key Reference for more information on the Power Search function.

Use the following steps to set the signal generator to manual fixed power search mode:

1.Preset the signal generator: press Preset.

2.Set the desired frequency: press Frequency and enter the desired frequency.

3.Set the desired amplitude: press Amplitude and enter the desired amplitude.

4. Turn the signal generator’s automatic leveling control (ALC) off: press Amplitude > ALC Off On to Off.

5.Turn the RF on: set RF On/Off to On.

6.Press Do Power Search.

This executes the manual fixed power search routine, which is the default mode.

There are three power search modes: manual, automatic, and span.

When Power Search is set to Manual, pressing Do Power Search executes the power search calibration routine for the current RF frequency and amplitude. In this mode, if there is a change in RF frequency or amplitude, you will need to press Do Power Search again.

When Power Search is set to Auto, the calibration routine is executed whenever the frequency or amplitude of the RF output is changed.

When Power Search is set to Span, pressing Do Power Search executes the power search calibration routine over a selected range of frequencies at one time. The power search corrections are then stored and used whenever the signal generator is tuned within the selected range of frequencies.

No Modulation at the RF Output

Check the MOD ON/OFF annunciator on the display. If it reads MOD OFF, press Mod On/Off to toggle the modulation on.

Although you can set up and enable various modulations, the RF carrier is modulated only when you have also set Mod On/Off to On.

On the E8267D, for digital modulation, make sure that I/Q Off On is set to On.

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Agilent Technologies E8257D PSG manual No Modulation at the RF Output, Setting Power Search Mode, Press Do Power Search
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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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