Chapter 15 499
Measurement Examples
Evaluating a Duplexer
15. Measurement Examples
Figure 15-14 Measurement result (segment display: order base)
9. Analyze the Parameters
The parameters for the duplexer are determined.
Step 1. Determine the insertion loss and 3-dB bandwidth for Tx.
Setup Description Key Operation
Marker coupling: OFF
- Couple (Turn it OFF)
Activating Trace 1
Marker 1: ON
Search/Tracking: ON
- Tracking (Turn it ON)
Moving the marker to the trace maximum Max
Bandwidth search: ON Bandwidth (Turn it ON.)
In the example shown in Figure 15-15, insertion loss (loss) is 1.243 dB, and the 3-dB
bandwidth (BW) is 85.53 MHz.
Step 2. Determine the insertion loss and 3-dB bandwidth for the Rx.
Setup Description Key Operation
Activating Trace 2
Marker 1: ON
Search/Tracking: ON
- Tracking (Turn it ON.)
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