
ET User’s Guide
6-21
Calibrating for Increased Measurement Accuracy
Calibration Kits
These effects are impossible to eliminate, but the
calculation built into the analyzer includes an
open-circuit capacitance model. This capacitance model
is a third-order polynomial as a function of frequency,
where the polynomial coefficients are user-definable.
The capacitance model equation is: C(f) = (C
0
) + (C
1
*f)
+ (C
2
*f
2
) + (C
3
*f
3
) where f is the measurement
frequency.
The terms in the equation are defined when specifying
the open as follows:
• C
0
is used to enter the C
0
term, which is the
constant term of the third-order polynomial and is
expressed in Farads.
• C
1
is used to enter the C
1
term, expressed in F/Hz
(Farads/Hz).
• C
2
is used to enter the C
2
term, expressed in F/Hz
2
.
• C
3
is used to enter the C
3
term, expressed in F/Hz
3
.
For further information on calibration kits and determining standard
characteristics, refer to HP Product Note 8510-5A (HP Publication
No. 5956-4352). To view this product note on the Web, go to
http://www.tmo.hp.com and select “Application Note Library.”
Step 2: Create a
User-Defined
Calibration Kit
A user-defined calibration kit can be created by either of these two
methods:
• Method A: use the softkeys under the Modify Kit menu.
This method provides a convenient and quick way to modify
calibration kit standards. Use this method during the development of
new calibration kit standards.
• Method B: use an ASCII file.
This method provides a way to manage calibration kit descriptions in
separate files. Use this method to keep permanently filed descriptions
of your calibration kits.
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 ...