Unregulated Operation

If the power supply goes into a mode of operation that is neither CV nor CC, the Unr annunciator will light. An unregulated condition limits the output current to a value that is safe for the power supply. Some unregulated states occur so briefly that they do not turn on the Unr annunciator, but they may set the UNR status bit during remote operation (see the power supply “Programming Guide”). One condition that can cause a noticeable unregulated state is low ac line voltage.

Saving and Recalling Operating States

You can save programming time by storing up to 5 (up to 4 with Series 668xA supplies) operating states in nonvolatile memory. The front panel programming parameters that are saved are:

■Output voltage, Output current, OVP voltage.

■ OCP state (on or off), Output state (enabled or disabled).

Note	More power supply parameters are saved in remote operation. See the power supply “Programming Guide”.

As an example, set up the following state:

■Voltage = 4 V Current = 5 A OVP voltage = 4.5 V.

■ OCP = on (OCP annunciator on) Output = off (Dis annunciator on).

Save the above state to location 1 by pressing . Now set up the following state:

■ Voltage = 4.5 V Current = 2.5 A

■OCP = off (OCP annunciator off)

OVP voltage = 5 V.

Output = on (Dis annunciator off).

Save the above state to location 2 by pressing .

Restore the first state by pressing and verify the parameters. Restore the second state by pressing

. Note how the power supply is automatically programmed each time.

Turn-On Conditions

Whenever you apply power to a new power supply it automatically turns on in a safe reset state with the following parameters:

off

minimum*

maximum

off

*Minimum is the *RST value specified in Table 3-1 in the Programming Guide.

It is recommended that you leave the turn-on conditions as programmed. However, you may change them if you wish. To do this, proceed as follows:

1.Set up the power supply to the state you want when it is turned on.

2.Store that state to location 0.

3.Turn off the power supply.

4.Hold in the key and turn the power supply back on. The display indicates RCL 0 PWR-ONto verify that the power

supply has configured its turn-on state to that stored in location 0.

5. From now on the supply will always turn on to the state defined in location 0.

92 Front Panel Operation

668xA, 669xA, 667xA, 664xA, 665xA specifications

Agilent Technologies has long been a pioneer in the production of high-performance electronic test and measurement instruments, particularly in the field of power sources. Among its notable offerings are the Agilent 667xA, 669xA, 665xA, 664xA, and 668xA series of power supplies. These instruments are designed to provide stable, reliable power for a variety of applications, including electronic testing, industrial processes, and research laboratories.

The Agilent 667xA series is characterized by its programmability and advanced measurement functions. These power supplies support a wide range of output voltages and currents, allowing for flexible configurations that cater to different testing needs. The built-in measurement capabilities enable users to monitor the voltage, current, and power with high precision, which is essential for ensuring optimal performance in electronic applications.

The Agilent 669xA series stands out with its high-power outputs, making it suitable for demanding applications. These power supplies deliver high voltage and current levels, making them ideal for testing high-performance devices, such as power amplifiers and motor drives. Additionally, the 669xA series includes features such as overvoltage protection and complex output sequencing to enhance the safety and reliability of the testing process.

The Agilent 665xA and 664xA series focus on delivering high accuracy and excellent regulation. These models are particularly known for their low noise operation, which is critical for sensitive applications where precision is paramount. The integrated programming capabilities allow users to automate testing sequences, thus improving efficiency in research and development settings.

The 668xA series features advanced digital signal processing that enhances the precision and stability of the output. Users benefit from features like remote sensing and monitoring, allowing feedback adjustments that maintain output accuracy despite cable losses. Furthermore, the 668xA models can integrate seamlessly with various test environments thanks to their LAN, GPIB, and USB connectivity options.

Overall, the Agilent 667xA, 669xA, 665xA, 664xA, and 668xA power supplies provide a comprehensive range of solutions for diverse electronic testing needs. With their advanced features, superb measurement capabilities, and robust performance, these instruments empower engineers and researchers to conduct their work with confidence, precision, and efficiency.

Agilent Technologies 667xA, 665xA Unregulated Operation, Saving and Recalling Operating States

Models: 668xA 669xA 667xA 664xA 665xA