user manual

4 Chapter 1
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.