Agilent Technologies 87075C manual Reduce the Effects of Test-System Drift with SelfCal

Introduction and Installation

Introduction to the Multiport Test Set

Reduce the Effects of Test-System Drift with SelfCal

SelfCal is an internally automated calibration technique that uses solid-state switches to measure calibration standards located inside the test set. SelfCal executes automatically in just a few seconds (at an interval you define), so the impact to your test process is minimal. Use SelfCal to:

•re-calibrate your multiport test system, returning it to the same measurement accuracy achieved immediately after performing a Test Set Cal

•reduce the effects of test-system drift, improving overall measurement accuracy between Test Set Cals

Since SelfCal does not correct for drift associated with interconnect elements between the test set and your DUT, it is essential to use high-quality test cables, adapters, and fixtures to ensure the best measurement accuracy.

Decrease Calibration Times and Increase Production Throughput

With SelfCal, a Test Set Cal needs to be performed about once per month, if within the specified temperature range. This is unlike other test systems that typically require calibration once or twice a day. Using Test Set Cal and SelfCal, you can:

•easily reduce your overall calibration times by a factor of twenty or more

•increase the amount of time a test station can be used for measuring devices—typically, by three days per month.

Improve Measurement Accuracy with Two-Port Calibration

When using a multiport test set with an E5061A/E5062A with the option 275 S-parameter test set, Test Set Cal and SelfCal support full two-port calibrations. Two-port error correction greatly improves the effective load match of the test system, providing excellent measurement accuracy.

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