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Chapter 7
Fixture Simulator
Example of Using Fixture Simulator
Example of Using Fixture Simulator
In this section, the fixture simulation function is explained based on an evaluation example
for a DUT (balanced SAW filter) with a balanced port.
Measurement circuit example for a DUT with balanced port
Figure 7-20 shows an example of a measurement circuit used to evaluate a balanced SAW
filter. DUT port 1 is an unbalanced port connected to source impedance Rs and input
matching circuit L1. DUT port 2 is a balanced port connected to an output matching circuit
(C1, C2, and L2) and load resistance RL.
Figure 7-20
Measurement circuit of balance SAW filter
Evaluation using an actual test fixture
Generally, a test fixture as shown in Figure 7-21 is fabricated for evaluating the
characteristics of a DUT in a measurement circuit by using a network analyzer.
In typical use, a network analyzer performs measurements at a 50
Ω
port reference
impedance and in a single-ended (unbalanced) state. Therefore, DUT port 1 can be
connected directly to the test port of the network analyzer.
On the other hand, DUT port 2 is a balanced port that cannot be connected directly to the
test port of the network analyzer. Usually, a balun (BALance-UNbalance transformer) is
used to convert the DUT’s balanced port to an unbalanced port and to connect the
converted port to the test port of the network analyzer. Matching circuits are mounted in
the test fixture as shown in Figure 7-21.
Summary of Contents for E5070B
Page 6: ......
Page 30: ...24 Contents ...
Page 34: ...28 Chapter1 Precautions Before contacting us ...
Page 286: ...280 Chapter6 Data Analysis Using the Equation Editor ...
Page 430: ...424 Chapter12 Optimizing Measurements Performing a Segment by Segment Sweep segment sweep ...
Page 538: ...532 Chapter15 Measurement Examples Executing Power Calibration ...
Page 634: ...628 AppendixB Troubleshooting Warning Message ...
Page 732: ...726 AppendixD Softkey Functions Trigger Menu ...
Page 740: ...734 AppendixE General Principles of Operation Data Processing ...
Page 760: ...754 AppendixF Replacing the 8753ES with the E5070B E5071B Comparing Functions ...
