
ET User’s Guide
6-13
Calibrating for Increased Measurement Accuracy
Calibration Choices
This method of calibration is only necessary when trying to achieve
maximum dynamic range (>100 dB). A response and isolation calibration
prompts you to connect loads to both ports and then to connect a through
cable. These standards are measured across the frequency band you have
defined, using the number of points you have defined. These
measurements are used to remove systematic errors caused by frequency
response and crosstalk.
This method of calibration is superior to the standard response
calibration. This calibration prompts you to connect four measurement
standards: an open, a short, a load, and a through cable. The analyzer
measures each standard across the frequency band you have defined,
using the number of points you have defined. The measurements of these
standards are used to remove systematic errors caused by frequency
response and source match.
Transmission Calibration Interpolation
Widening the frequency span after performing any of these calibrations
will invalidate them, and restore the default calibration. You may
narrow the span and the analyzer will interpolate between calibration
points for the narrower span.
Note that after you have calibrated, a "C" appears in the upper right
hand corner of the display. This "C" indicates that a user-defined cal is in
use. If you change to a narrower span, note that the "C" changes to "C?",
indicating the analyzer is now interpolating between calibrated
measurement points. The "C?" notation also appears when other system
parameters, such as power, number of points, or sweep time, have
changed.
Response & Isolation
Enhanced Response
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 ...