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N7800A Calibration and Adjustment Software for Self-Maintainers

Data Sheets

Get Licensed Access to Run the Same Software Used in Keysight Service Centers

Keysight Technologies, Inc. strives to provide the best service available for a broad range of instruments, but you may be a customer who balances cost, quality, and cycle time requirements by performing your own calibrations whenever possible. If you have the necessary equipment, facility, manpower, and skill, you could benefit from having robust automated routines to facilitate the calibration task.

If you perform calibration for instruments owned by your company and do not offer calibration as a commercial service, you may be eligible for licensed access to Keysight calibration software.

N7800A calibration and adjustment software offers you the following:

  • Licensed access: to the same OEM calibration software used in Keysight Service Centers
  • Compliance to: ISO/IEC 17025:2005, ANSI Z540-1:R2002, ANSI Z540.3-2006
  • OEM performance tests: for all data sheet specifications and installed options
  • Automated adjustments: whenever measured performance is outside acceptance limits
  • Measurement uncertainty analyses: in accordance with the ISO Guide for Expression of Uncertainty of Measurements
  • Reduced cost and risk: of managing new capital instrument purchases because Keysight supports a broad set of standards

Overview

Performance tests

During the new product introduction phase, Keysight research and development and manufacturing engineers characterize the actual performance of pilot production runs. Support engineers and metrologists work to ensure the performance tests have sufficiently low measurement uncertainty and adequate margin to warrant instrument performance to factory specifications. This combined attention to an ISO GUM based measurement equation1, and detailed knowledge of the instrument block diagram, results in a sequence of original equipment manufacturer (OEM) performance tests for use in service centers. Every warranted (also known as “hard”) specification has a corresponding performance test over the range of specified conditions (frequency range, level, etc.). In short, performance tests measure the actual performance of every hard specification, for every option.

Automated adjustments, if needed

The days of screwdriver “tweaks” are long gone. Many of the performance advantages offered by Keysight instruments rely on the ability to fine-tune the hardware under microprocessor control. Amplifier gains, filter corners, DC offsets, and other functions can be adjusted according to measurement environment and component aging. These adjustments require complex iterative external measurements and calculations to characterize the instrument while changing internal DAC settings. Intimate knowledge of the architecture and detailed circuitry are required, so such adjustment capability is available only in the Keysight N7800A platform software.

Keysight Service Center records indicate that roughly 10% of customers’ instruments fail at least one specification during initial performance testing, but can be brought into compliance simply through automatic adjustments, eliminating the need for a “hardware repair”. Only Keysight N7800A calibration software includes adjustments to reduce costly repair charges and untimely delays.

Post-repair adjustments

When an instrument is broken and PC boards or other major components are replaced, post-repair adjustments are required before performance tests can be re-run to ensure it performs within specifications. For example, Figure 2 and 3 show the post-repair adjustments and performance tests you would need to run on an E4438C signal generator after replacing one or more boards. Keysight N7800A software streamlines this process by automating these post-repair procedures.

Support for a broad set of lab standards

Keysight strives to reduce your cost of operating a state-of-the-art calibration center by supporting the broadest practical range of lab standards. Should you find that you do not already have one of the many alternative lab standards listed in our documentation, and need to purchase new equipment, our metrologists maintain a convenient list of Recommended (and Alternative) Lab Standards and Special Cal Options, which lists the standards (instruments) and options that provide the broadest coverage across all N7800A applications. You may, of course, choose to purchase only those options required for the products you intend to test, by examining the detailed Help Text for those specific N7800A applications.

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