
ET User’s Guide
5-11
Optimizing Measurements
Increasing Network Analyzer Dynamic Range
Changing
Measurement
Averaging
In averaging mode, the analyzer measures each frequency point once per
sweep and averages the current and previous trace up to the averaging
factor specified by the user. The instrument computes each data point
based on an exponential average of consecutive sweeps weighted by the
user-specified averaging factor.
As the averaging factor is increased:
• signal-to-noise ratio increases,
• time for each individual sweep remains the same, but
• total measurement time increases.
Averaging is better than system bandwidth reduction at minimizing very
low frequency noise.
1. Press
and enter an averaging factor that
is less than the value displayed on the analyzer screen, followed by
.
2. Press
.
NOTE
When averaging is on, there is an indicator in the lower right corner of
the analyzer's display. The display is in the form
Avg x,y
where "x" is
the averaging factor for measurement channel 1, and "y" is the averaging
factor for measurement channel 2. If only one measurement channel is
on, the averaging indicator only displays that channel's averaging factor.
AVG
Average Factor
ENTER
Average on OFF
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 ...