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Agilent Technologies 669xA Checksum Errors, Runtime Error Messages, Error Display Failed Test

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

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Table 3-3. Power-On Selftest Errors

Error

Display

Failed Test

No.

 

 

El

FP RAM

Front Panel RAM

E2

FP ROM

Front Panel ROM checksum

E3

EE CHKSUM

EEPROM

E4

PRI XRAM

Primary external RAM

E5

PRI IRAM

Primary internal RAM

E6

PRI ROM

Primary ROM checksum

E7

GPIB

GPIB R/W to serial poll

Error

Display

Failed Test

No.

 

 

E8

SEC RAM

Secondary RAM

E9

SEC ROM

Secondary ROM checksum

E10

SEC 5V

Secondary 5 V ADC reading

Ell

TEMP

Secondary ambient

 

DACS

thermistor reading

E12

Secondary VDAC/IDAC

 

 

readback

Checksum Errors.

If the display shows EE CHKSUM, the power supply has detected an EEPROM checksum error. A checksum error can occur due to the following conditions:

■Excessive number of write cycles to an EEPROM (see "Nonvolatile Memory Write Cycles" in "Supplemental Characteristics" tables). This condition, which would appear only after extended use, is not recoverable and requires service.

■Loss of ac input power during a checksum calculation. This condition, which is very unlikely, is recoverable.

You may be able to recover from a checksum error by writing to the EEPROM while the power supply is in the calibration mode. To do this, proceed as follows:

1.Enable the calibration mode by pressing .

2.PASWD will appear on the display.

3.Press the number keys corresponding to the password, followed by . The Cal annunciator will go on.

Note

On new equipment, the calibration password corresponds to the four-digit model number (such as

 

). See "Appendix A - Calibration" for more information about the calibration password.

4.Save any operating state (for example, press ).

5.Turn the power off and then back on.

A normal display free of error messages should appear. If not, the power supply requires service.

Runtime Error Messages

Under unusual operating conditions, the VOLT or AMPS display may show +OL or -OL.This indicates that the output voltage or current is beyond the range of the meter readback circuit. Table 3-4 shows other error messages that may appear at runtime.

 

Table 3-4. Runtime Errors

 

Display

Meaning

 

Display

Meaning

EE WRITE ERR

EEPROM status timeout

 

UART FRAMING

UART byte framing error

SBUB FULL

Message too long for buffer

 

UART OVERRUN

Overfilled UART receive buffer

SERIAL DOWN

Failed communication with

 

UART PARITY

UART byte parity error panel

STK OVERFLOW

front panel

 

 

 

Front panel stack overflow

 

 

 

58 Turn-On Checkout

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Agilent Technologies 669xA, 665xA Checksum Errors, Runtime Error Messages, Power-On Selftest Errors Display Failed Test
Page 57 Page 59

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.