
5-12
ES User’s Guide
Optimizing Measurements
Reducing Trace Noise
Reducing Trace Noise
To help reduce the effect of noise on the data trace, you can use three
analyzer functions to activate measurement averaging, reduce system
bandwidth, and eliminate spurious responses.
To Activate Averaging for Reducing Trace
Noise
The analyzer uses a weighted running average for averaging. The noise
is reduced with each new sweep as the effective averaging factor
increments.
1. Press
.
2. Enter a value followed by
.
3. Press
.
Averaging is explained more fully in the previous section.
To Change System Bandwidth for Reducing
Trace Noise
By reducing the system bandwidth, you reduce the noise that is
measured during the sweep. However, the decreased bandwidth may
slow down the sweep. While averaging requires multiple sweeps to
reduce noise, narrowing the system bandwidth reduces the noise on each
sweep. See the previous section for a more detailed explanation of system
bandwidth.
Press
or
.
Narrower system bandwidths cause longer sweep times. When in auto
sweep time mode, the analyzer uses the fastest sweep time possible for
any selected system bandwidth. Auto sweep time mode is the default
analyzer setting.
AVG
Average Factor
ENTER
Average on OFF
AVG
System Bandwidth Narrow 250 Hz
Fine 15 Hz
Summary of Contents for HP 8712ES
Page 8: ...viii ES User s Guide ...
Page 17: ...ES User s Guide 1 1 1 Installing the Analyzer ...
Page 34: ...1 18 ES User s Guide Installing the Analyzer Preventive Maintenance ...
Page 35: ...ES User s Guide 2 1 2 Getting Started ...
Page 52: ...2 18 ES User s Guide Getting Started Performing the Operator s Check ...
Page 53: ...ES User s Guide 3 1 3 Making Measurements ...
Page 135: ...ES User s Guide 4 1 4 Using Instrument Functions ...
Page 159: ...ES User s Guide 4 25 Using Instrument Functions Using Markers Figure 4 15 Delta Marker Mode ...
Page 165: ...ES User s Guide 4 31 Using Instrument Functions Using Limit Testing Figure 4 16 Limit Lines ...
Page 224: ...4 90 ES User s Guide Using Instrument Functions Using an External VGA Monitor ...
Page 225: ...ES User s Guide 5 1 5 Optimizing Measurements ...
Page 246: ...5 22 ES User s Guide Optimizing Measurements Measuring Devices with Long Electrical Delay ...
Page 247: ...ES User s Guide 6 1 6 Calibrating for Increased Measurement Accuracy ...
Page 281: ...ES User s Guide 7 1 7 Front Rear Panel ...
Page 306: ...7 26 ES User s Guide Front Rear Panel Line Module ...
Page 307: ...ES User s Guide 8 1 8 Hardkey Softkey Reference ...
Page 410: ...8 104 ES User s Guide Hardkey Softkey Reference Z ...
Page 411: ...ES User s Guide 9 1 9 Specifications ...
Page 469: ...ES User s Guide 10 1 10 Safety and Regulatory Information ...
Page 475: ...ES User s Guide 10 7 Safety and Regulatory Information Regulatory Information ...
Page 476: ...10 8 ES User s Guide Safety and Regulatory Information Regulatory Information ...
Page 477: ...ES User s Guide 11 1 11 Factory Preset State and Memory Allocation ...