
6-2
ET User’s Guide
Calibrating for Increased Measurement Accuracy
Introduction
Introduction
This chapter first explains measurement calibration in the section titled
“Measurement Calibration Overview.”
overview provide instructions for choosing, performing, saving, and
checking measurement calibrations.
Each example measurement in
Chapter 3, “Making Measurements,”
provides an example calibration for the particular type of measurement.
Measurement Calibration Overview
Measurement calibration is a process that improves measurement
accuracy by using error correction arrays to compensate for systematic
measurement errors. Measurement calibration is also called cal,
accuracy enhancement, and error correction. Measurement errors are
classified as random, drift, and systematic errors. Random errors, such
as noise and connector repeatability, are non-repeatable and not
correctable by measurement calibration. Drift errors, such as frequency
and temperature drift, occur after a calibration has been performed and
can only be removed by doing another calibration.
Systematic errors, such as tracking and mismatch, are the most
significant errors in most RF measurements. Fortunately, systematic
errors are repeatable and for the most part correctable, though small
residual errors may remain. In brief, systematic errors are correctable.
Repeatable systematic errors are due to the frequency response of the
receivers, leakage between the signal paths, and signal reflections due to
mismatch in the test setup.
Summary of Contents for HP 8712ET
Page 8: ...viii ET User s Guide ...
Page 17: ...ET User s Guide 1 1 1 Installing the Analyzer ...
Page 34: ...1 18 ET User s Guide Installing the Analyzer Preventive Maintenance ...
Page 35: ...ET User s Guide 2 1 2 Getting Started ...
Page 52: ...2 18 ET User s Guide Getting Started Performing the Operator s Check ...
Page 53: ...ET User s Guide 3 1 3 Making Measurements ...
Page 118: ...3 66 ET User s Guide Making Measurements Measuring Impedance Magnitude ...
Page 119: ...ET User s Guide 4 1 4 Using Instrument Functions ...
Page 143: ...ET User s Guide 4 25 Using Instrument Functions Using Markers Figure 4 15 Delta Marker Mode ...
Page 149: ...ET User s Guide 4 31 Using Instrument Functions Using Limit Testing Figure 4 16 Limit Lines ...
Page 207: ...ET User s Guide 5 1 5 Optimizing Measurements ...
Page 226: ...5 20 ET User s Guide Optimizing Measurements Measuring Devices with Long Electrical Delay ...
Page 227: ...ET User s Guide 6 1 6 Calibrating for Increased Measurement Accuracy ...
Page 266: ...6 40 ET User s Guide Calibrating for Increased Measurement Accuracy Checking the Calibration ...
Page 267: ...ET User s Guide 7 1 7 Front Rear Panel ...
Page 292: ...7 26 ET User s Guide Front Rear Panel Line Module ...
Page 293: ...ET User s Guide 8 1 8 Hardkey Softkey Reference ...
Page 395: ...ET User s Guide 9 1 9 Specifications ...
Page 397: ...ET User s Guide 9 3 Specifications System Performance ...
Page 443: ...ET User s Guide 10 1 10 Safety and Regulatory Information ...
Page 449: ...ET User s Guide 10 7 Safety and Regulatory Information Regulatory Information ...
Page 450: ...10 8 ET User s Guide Safety and Regulatory Information Regulatory Information ...
Page 451: ...ET User s Guide 11 1 11 Factory Preset State and Memory Allocation ...