
ET User’s Guide
4-9
Using Instrument Functions
Using Markers
To Search for
Target Values
1. Press
.
2. Press
to choose the target level and enter the target
value. (The default value is
−
3 dB.)
3. Press
and notice the marker moves to the first
occurrence of the target value to the right. The target value is in
reference to 0 dB.
4. Press
and notice the marker moves to the first
occurrence of the target value to the left.
5. Each time you press
or
, the marker
moves to the next occurrence of the target level. If no occurrence is
found, the message, "
Target not found.
" appears momentarily on
the display.
To Search for
Bandwidth Values
NOTE
The bandwidth search function is intended for transmission or power
measurements in log mag format only.
1. Press
.
The bandwidth search feature analyzes a bandpass filter and
calculates the bandwidth, center frequency, and Q (see note below) for
the specified bandwidth level. (The default bandwidth search level is
−
3 dB.) The bandwidth information is displayed in the upper-right
corner of the network analyzer screen. The bandwidth feature puts
marker 1 in delta marker mode. (Delta marker mode is explained
later in this chapter.)
NOTE
Center frequency is defined as the halfway point between the left and
right bandwidth cutoff points.
Loss is the amplitude of the center frequency marker.
Q stands for "quality factor," and is defined as the ratio of a circuit's
resonant frequency to its bandwidth. Your analyzer calculates Q as the
center frequency divided by the bandwidth.
Prior Menu Prior Menu All Off 1: Marker Search
Target Search
Target Value
Search Right
Search Left
Search Right
Search Left
MARKER
Marker Search Bandwidth
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 ...