Programming Examples - 4

Selecting a Phase

Two commands determine which output phase or phases receive commands in the three-phase model. These are:

INSTrument:COUPle ALL NONE

INSTrument:NSELect <n>

The *RST setting for INSTrument:COUPle is ALL. This setting causes programming commands to be sent to all output phases simultaneously.

To send a programming command to only one of the output phases, set INSTrument:COUPle to NONE, then select the desired output to receive the command with INSTrument:NSELect. For example, when the commands

INSTrument:COUPle NONE

INSTrument:NSELect 2

are sent, all subsequent voltage commands will go to output phase 2, and all measurement queries will return readings from output phase 2.

NOTE: The INSTrument:COUPle command has no effect on queries. In the Agilent 6834B three- phase model, queries are always directed to the output selected by INSTrument:NSELect.

Programming the Output Phase

You can control the phase of the ac voltage waveform relative to an internal reference with:

PHASe <n>

which sets the phase in degrees. If <n> is positive, the voltage waveform leads the internal reference.

In the Agilent 6834B three-phase model, the PHASe command sets the relative phase of each of the outputs. The INSTrument:COUPle setting is ignored by the PHASe command -- it always controls the output selected by INSTrument:NSELect.

In the single-phase models, the only discernible effect of using the PHASe command is to cause an instantaneous shift in output waveform phase. This is because the internal phase reference is not accessible externally.

Current Limit

All ac source models have a programmable rms current limit function. The command to set this limit is:

CURRent <n>

where <n> is the rms current limit in amperes.

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. Since the rms detection involves a filter time constant that is long compared to a single output cycle, the response time of the rms current limit is not instantaneous. When the output voltage is reduced, its waveform is preserved (the output waveform is attenuated, not clipped).

125

Page 124 Page 126
Page 125
Image 125
Agilent Technologies 6812B, 6834B, 6814B, 6843A, 6813B Current Limit, Selecting a Phase, Programming the Output Phase, 125
Page 124 Page 126

6812B, 6811B, 6813B, 6834B, 6843A 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