1 - General Information

RMS Current Limit Circuit

The output rms current limit is adjustable to any value within the range of the unit. If the load attempts to draw more current than the programmed limit, the output voltage is reduced to keep the rms current within the limit. When the output voltage is reduced, the waveform shape is preserved. In other words, all parts of the voltage cycle are reduced -- not just the peaks.

NOTE: The speed at which the rms current circuit operates depends on the output voltage setting and the load impedance. The circuit responds more slowly at low output voltages and at high output impedances. With constant power or negative resistance loads, the rms current limit circuit causes the output voltage to go to zero.

Voltage Regulation

Real Time Regulation

The default method of output regulation used by the ac source is real-time voltage regulation. Real-time voltage regulation tries to provide the actual programmed waveform at the output of the ac source. It offers the best overall programming response and fastest settling times. It does not have any limitations for waveforms and transients with frequency content below 45 Hz.

RMS Regulation

Rms voltage regulation assists real-time regulation to level out or stabilize the rms value of the ac component of the output voltage. Use rms voltage regulation in the following situations:

♦If you experience load regulation effects with heavy loads.

♦If you experience frequency regulation problems with heavy loads and you require flatter programming accuracy at higher frequencies.

♦In conjunction with programmable output impedance, if you wish to maintain the rms level of output voltage as the source impedance is increases. (Refer to Output Impedance for more information.)

The command to specify voltage regulation is VOLT:ALC:DET RTIM RMS.

NOTE: Do not use rms voltage regulation when operating at frequencies less than 45 Hz.

Output Impedance

You can program the real and/or reactive (resistive and/or inductive) part of the output impedance of the ac source. Inductive output impedances can be programmed in the range of 20 to 1000 microhenries. Resistive load impedances can be programmed in the range of 0 to 1 ohms.

When programming output impedances, the lower your load impedance, the LESS programmed impedance you can use and still maintain output voltage stability. This applies particularly for load impedances less than 1 ohm.

18

Page 17 Page 19
Page 18
Image 18
Agilent Technologies 6813B, 6811B RMS Current Limit Circuit, Voltage Regulation, Output Impedance, Real Time Regulation
Page 17 Page 19

6812B, 6811B, 6813B specifications

Agilent Technologies, a leader in electronic test and measurement equipment, offers a range of powerful signal sources including the 6843A, 6834B, 6814B, 6813B, and 6811B models. These instruments are designed to support various applications in research, development, and manufacturing, providing precise signal generation capabilities.

The Agilent 6843A is a versatile signal generator known for its exceptional frequency range and modulation capabilities. It supports an extensive bandwidth, making it ideal for applications that require high-frequency signal generation. With its superior phase noise performance, the 6843A is an excellent choice for radar, wireless communications, and electronic warfare applications. The instrument features an intuitive user interface, allowing engineers to set parameters quickly and efficiently.

Next, the Agilent 6834B offers exceptional performance characteristics, including high output power and low distortion. This signal generator is particularly noted for its ability to produce complex modulation formats, making it suitable for testing advanced wireless communication systems. With a reliable and stable output, the 6834B ensures accurate and repeatable measurements, which is vital for thorough testing processes.

The 6814B model stands out for its dual-channel capabilities, allowing users to generate simultaneous signals for testing multiple components or systems. This feature significantly enhances testing efficiency and flexibility for engineers. With built-in arbitrary waveform functionality, users can create custom waveforms, making the 6814B suitable for a wide range of applications including device characterization and signal processing research.

For those seeking a more compact solution, the Agilent 6813B provides essential signal generation features without compromising on performance. It is designed for a variety of applications across telecommunications and consumer electronics, featuring a straightforward interface and robust performance metrics.

Lastly, the 6811B is an entry-level yet capable model that supports a broad spectrum of testing needs. Perfect for educational and laboratory environments, it provides essential functionalities required for effective signal generation and analysis.

Overall, Agilent Technologies' 6843A, 6834B, 6814B, 6813B, and 6811B signal generators offer an array of features and technologies that cater to various application needs. Their precision, reliability, and user-oriented designs position them as invaluable assets in any testing environment, ensuring engineers can carry out their work with confidence and accuracy.
Top Page Image Contents