RF Output Power too Low

Troubleshooting

RF Output Power Problems

1.Look for an OFFS or REF indicator in the AMPLITUDE area of the display.

OFFS tells you that an amplitude offset has been set. An amplitude offset changes the value shown in the AMPLITUDE area of the display but does not affect the output power. The amplitude displayed is equal to the current power output by the signal generator hardware plus the value for the offset.

To eliminate the offset, press the following keys:

Amplitude > More (1 of 2) > Ampl Offset > 0 > dB.

REF tells you that the amplitude reference mode is activated. When this mode is on, the displayed amplitude value is not the output power level. It is the current power output by the signal generator hardware minus the reference value set by the Ampl Ref Set softkey.

To exit the reference mode, follow these steps:

a.Press Amplitude > More (1 of 2).

b.Press Ampl Ref Off On until Off is highlighted.

You can then reset the output power to the desired level.

2.If you are using the signal generator with an external mixer, see “Signal Loss While Working with a Mixer” on page 244.

3.If you are using the signal generator with a spectrum analyzer, see “Signal Loss While Working with a Spectrum Analyzer” on page 246.

The Power Supply has Shut Down

If the power supply is not working, it requires repair or replacement. There is no user- replaceable power supply fuse. Refer to the E8257D/67D PSG Signal Generators Service Guide for instructions.

Signal Loss While Working with a Mixer

If you experience signal loss at the signal generator’s RF output during low- amplitude coupled operation with a mixer, you can solve the problem by adding attenuation and increasing the RF output amplitude of the signal generator.

Figure 12- 1 shows a hypothetical configuration in which the signal generator provides a low amplitude signal to a mixer.

244	Chapter 12

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 RF Output Power too Low, Power Supply has Shut Down

Models: E8267D PSG E8257D PSG