3-48 ES User’s Guide
Making Measurements
Measuring S11 Reflection Port 1 using a One-Port Calibration
Measuring S
11
Reflection Port 1 using a
One-Port Calibration
This section uses an example measurement to describe how to calibrate
for and make an S
11
measurement. The same general concepts apply for
an S
22
measurement. This example uses a one-port reflection calibration,
but a two-port calibration, explained earlier in this chapter, could also be
used for this measurement. Although the two-port calibration is the most
accurate form of error correction for a two-port device, it results in a
slower measurement speed. See the table below for a list of all possible
calibration choices for S
11
or S
22
measurements.
TIP An optimum calibration is critical for achieving best measurement
accuracy. Refer to Chapter 6, “Calibrating for Increased Measurement
Accuracy,” for detailed information about all of the various aspects of
calibration.
Table 3-4 Calibration Types for S
11
and S
22
Measurements
In this example, a bandpass filter like the one that was supplied with
your network analyzer is used.
Measurement Type Calibration Choices
S
11
Refl Port 1 or
S
22
Refl Port 2
Default 1-Port
Default 2-Port
User 1-Port
User 2-Port
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