
ES User’s Guide
4-13
Using Instrument Functions
Using Markers
To Search for
Notch Values
NOTE
The notch search function is intended for transmission or power
measurements in log mag format only.
1. To follow along with this example, you will need to connect a notch
filter to the analyzer in place of the bandpass filter shown in
2. Press
.
3. The notch search feature analyzes a notch filter and calculates the
bandwidth, center frequency, and Q (see note below) for the specified
notch level. (The default notch search level is
−
6 dB.) The resulting
information is displayed in the upper-right corner of the network
analyzer screen. The notch feature puts marker 1 in delta marker
mode. (Delta marker mode is explained later in this chapter.)
NOTE
Q stands for "quality factor," 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.
Each marker's dedicated use is listed in the following table.
shows a
−
6 dB notch marker search on measurement channel 1.
Dedicated Use of Markers in Notch Search Mode
a. The center frequency is defined by the analyzer as the midpoint between the left
and right notch points.
b. Where n is the target value, and the
−
n dB point is relative to the maximum
response (marker 1).
MARKER
All Off Marker Search Notch
Dedicated Use
Measurement Channel 1
Measurement Channel 2
maximum power value
marker 1
marker 2
center frequency of stop band
a
marker 3
marker 4
notch
−
n dB point
b
(left)
marker 5
marker 7
notch
−
marker 6
marker 8
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 ...