
ET User’s Guide
6-29
Calibrating for Increased Measurement Accuracy
Checking the Calibration
5. When the residual errors have drifted beyond what is acceptable, note
the time interval and use that information to determine what is the
best calibration interval for your measurements.
6. Repeat the process above enough times to feel confident that your
calibration interval is correct.
To Perform a Calibration Check
The calibration check feature can be used on any of the transmission or
reflection calibrations available (including the factory default
calibration). See
Table 6-2, “Calibration Check Error Terms.”
Table 6-2
Calibration Check Error Terms
1. O = Open, S = Short, L = Load, T = Thru
2. See
“Error Term Descriptions and Typical Values” on page 6-31
3. Used with multiport test sets.
Measurement
Type
Calibration
Types
Standards
Needed
1
Error Terms
2
Computed
Transmission
Default
Response
Response &
Isolation
Enhanced
Response
Test Set
3
O,S,L,T
O,S,L,T
O,S,L(2),T
O,S,L,T
O,S,L,T
Source Match, Load Match, Transmission Tracking
Source Match, Load Match, Transmission Tracking
Source Match, Load Match, Transmission Tracking,
Isolation
Source Match, Load Match, Transmission Tracking
Source Match, Load Match, Transmission Tracking
Reflection
Default
One-Port
Test Set
O,S,L
O,S,L
O,S,L
Directivity, Source Match, Reflection Tracking
Directivity, Source Match, Reflection Tracking
Directivity, Source Match, Reflection Tracking
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 ...