
4-10
ES User’s Guide
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 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 ...