
ET User’s Guide
5-15
Optimizing Measurements
Reducing Mismatch Errors
Reducing Mismatch Errors
Mismatch errors are due to the fact that the analyzer’s port impedances
are not exactly 50 ohms or 75 ohms across the frequency range.Source
match errors are produced on the source (analyzer RF OUT) side of the
DUT; load match errors on the load (analyzer RF IN) side. If the DUT is
not connected directly to the port, the mismatch errors due to cables,
adapters, etc. are considered part of the source or load match errors.
Source match and load match error terms can be reduced by using the
methods described in this section.
Reducing Mismatch Errors in a Reflection
Measurement
The best way to reduce mismatch errors in a reflection measurement of a
two-port device is to perform a reflection calibration directly at the point
that will connect to the DUT, using the exact frequency parameters that
you will be using for the measurement. The accuracy of a one-port
calibration for a two-port device can be increased dramatically by
terminating the output port of the device with a high quality Z
0
termination (a load from a calibration kit, for example) instead of
connecting it to the analyzer.
1. Set up your reflection measurement and frequency parameters.
2. Press
.
3. Follow the instructions on the display.
See
for more information on calibration choices for reflection
measurements.
CAL
1-Port
Содержание HP 8712ET
Страница 8: ...viii ET User s Guide ...
Страница 17: ...ET User s Guide 1 1 1 Installing the Analyzer ...
Страница 34: ...1 18 ET User s Guide Installing the Analyzer Preventive Maintenance ...
Страница 35: ...ET User s Guide 2 1 2 Getting Started ...
Страница 52: ...2 18 ET User s Guide Getting Started Performing the Operator s Check ...
Страница 53: ...ET User s Guide 3 1 3 Making Measurements ...
Страница 58: ...3 6 ET User s Guide Making Measurements Measuring Devices with Your Network Analyzer Figure 3 3 Block Diagram ...
Страница 118: ...3 66 ET User s Guide Making Measurements Measuring Impedance Magnitude ...
Страница 119: ...ET User s Guide 4 1 4 Using Instrument Functions ...
Страница 129: ...ET User s Guide 4 11 Using Instrument Functions Using Markers Figure 4 6 6 dB Bandwidth Marker Search ...
Страница 131: ...ET User s Guide 4 13 Using Instrument Functions Using Markers Figure 4 7 6 dB Notch Marker Search ...
Страница 134: ...4 16 ET User s Guide Using Instrument Functions Using Markers Figure 4 10 Multi Peak Search Mode ...
Страница 135: ...ET User s Guide 4 17 Using Instrument Functions Using Markers Figure 4 11 Multi Notch Search Mode ...
Страница 137: ...ET User s Guide 4 19 Using Instrument Functions Using Markers Figure 4 12 Marker Statistics Function ...
Страница 139: ...ET User s Guide 4 21 Using Instrument Functions Using Markers Figure 4 13 Marker Flatness Function ...
Страница 141: ...ET User s Guide 4 23 Using Instrument Functions Using Markers Figure 4 14 RF Filter Statistics Function ...
Страница 143: ...ET User s Guide 4 25 Using Instrument Functions Using Markers Figure 4 15 Delta Marker Mode ...
Страница 149: ...ET User s Guide 4 31 Using Instrument Functions Using Limit Testing Figure 4 16 Limit Lines ...
Страница 167: ...ET User s Guide 4 49 Using Instrument Functions Customizing the Display Figure 4 22 The Display Annotation ...
Страница 171: ...ET User s Guide 4 53 Using Instrument Functions Customizing the Display Figure 4 23 Normal Display ...
Страница 172: ...4 54 ET User s Guide Using Instrument Functions Customizing the Display Figure 4 24 Expanded Display ...
Страница 207: ...ET User s Guide 5 1 5 Optimizing Measurements ...
Страница 226: ...5 20 ET User s Guide Optimizing Measurements Measuring Devices with Long Electrical Delay ...
Страница 227: ...ET User s Guide 6 1 6 Calibrating for Increased Measurement Accuracy ...
Страница 235: ...ET User s Guide 6 9 Calibrating for Increased Measurement Accuracy Calibration Choices Figure 6 4 Calibration Choices ...
Страница 266: ...6 40 ET User s Guide Calibrating for Increased Measurement Accuracy Checking the Calibration ...
Страница 267: ...ET User s Guide 7 1 7 Front Rear Panel ...
Страница 269: ...ET User s Guide 7 3 Front Rear Panel Connectors Connectors Figure 7 1 Analyzer Connectors Front Panel ...
Страница 289: ...ET User s Guide 7 23 Front Rear Panel Line Module Figure 7 12 Power Cable and Line Mains Plug Part Numbers ...
Страница 292: ...7 26 ET User s Guide Front Rear Panel Line Module ...
Страница 293: ...ET User s Guide 8 1 8 Hardkey Softkey Reference ...
Страница 395: ...ET User s Guide 9 1 9 Specifications ...
Страница 397: ...ET User s Guide 9 3 Specifications System Performance ...
Страница 443: ...ET User s Guide 10 1 10 Safety and Regulatory Information ...
Страница 449: ...ET User s Guide 10 7 Safety and Regulatory Information Regulatory Information ...
Страница 450: ...10 8 ET User s Guide Safety and Regulatory Information Regulatory Information ...
Страница 451: ...ET User s Guide 11 1 11 Factory Preset State and Memory Allocation ...