
6-4
ET User’s Guide
Calibrating for Increased Measurement Accuracy
Measurement Calibration Overview
The analyzer has several methods of measuring and compensating for
these test system errors. Each method removes one or more of the
systematic errors using an equation called an error model. Measurement
of high quality standards (short, open, load, and through, for example)
allows the network analyzer to solve for the error terms in the error
model. The accuracy of the calibrated measurements is dependent on the
quality of the standards used for calibrating. Since Hewlett-Packard
calibration standards are very precise, great accuracy is achieved.
When you perform a calibration, the analyzer calculates the difference
between measurement data of known calibration standards and ideal
measurement data to create error correction arrays. The network
analyzer uses these error-correction arrays to correct subsequent
measurement data.
To see all of the calibration choices available for measurements, refer to
Table 6-1, “Calibration Choices,” on page 6-8
To perform a quality calibration:
• Use the highest quality standards available and take care of them.
• When performing a one-port reflection calibration or an enhanced
response calibration, be sure to select the correct cal kit by pressing
.
• Make consistent connections of the standards and DUTs (if possible,
use a torque wrench when using 3.5 mm connectors).
• Minimize temperature variations.
• Use high-quality cables (semi-rigid cables, for example).
• Minimize movement of cables.
CAL
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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 ...