
ET User’s Guide
5-5
Optimizing Measurements
Increasing Sweep Speed
To Reduce the Amount of Averaging
If averaging has been turned on (it is off in the factory preset condition),
reducing the averaging factor (or turning it off altogether) will increase
the analyzer's measurement speed. Averaging requires multiple sweeps
which increases measurement time. Turning off averaging and using a
narrower system bandwidth may produce faster results.
1. Press
and enter an averaging factor that is
less than the value displayed on the analyzer screen and press
.
2. If you want to turn the averaging off, press
.
To Reduce the Number of Measurement Points
To reduce the number of measurement points, press
and use the front panel knob, the
keys, or the numeric keypad to enter the reduced number.
Generally, as the number of points is decreased, so is the sweep time.
However, other factors will affect the sweep time such as:
• using frequency bands that contain very low frequencies (below
approximately 20 MHz)
• the number of band crossing points encountered in a sweep (at
approximately 1900 MHz, 2310 MHz, and 2620 MHz) (HP 8714ET
only)
• if the MHz/msec rate is above the maximum rate at which the source
can be swept
The following graph shows an example of the relationship between the
number of points, frequency span, and total cycle time. Total cycle time is
defined as the time from the start of the sweep to the start of the next
sweep. This graph was created with data from a setup on an HP 8714ET
using
conditions, except for number of
points and sweep frequencies, as noted on the graph.
AVG
Average Factor
ENTER
AVG
Average on OFF
MENU
Number of Points
PRESET
Factory Preset
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 ...