
6-6
ET User’s Guide
Calibrating for Increased Measurement Accuracy
Default versus User-Defined Calibration
Default versus User-Defined Calibration
The analyzer features factory-installed default calibrations that use
vector error correction, so that measurements can be made on many
devices without performing a user-defined calibration. These default
calibrations are quick and convenient, but not as accurate as
user-defined calibrations. This section shows you how to determine if
your test setup is compatible with a default calibration or requires a
user-defined calibration.
When to Use a Default Calibration
• Your test doesn't require the best accuracy possible.
• Your test device is connected directly to the analyzer’s reflection port
with no adapters or intervening cables.
If your test setup meets these conditions, you can use the default
calibration rather than perform a user-defined calibration. However,
without a user-defined calibration, the analyzer is not guaranteed to
meet its published measurement port specifications.
When to Perform a User-Defined Calibration
• You want the best accuracy possible.
• You are adapting to a different connector type or impedance.
• You are connecting a cable between the test device and the analyzer’s
reflection port.
• You are measuring across a narrow frequency span or using an
electrically long device.
• You are connecting any attenuator or other such device on the input
or output of the test device.
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 ...