328 Keysight N9927-90001 User’s Guide
Reflection Mode (SA Models) - Option 320
Reflection Mode Settings
Reflection Mode Settings
Select Reflection Mode before making any setting in this chapter.
How to select Reflection Mode
—Press Mode
—Then Reflection
Measurement Selection
How to select a Reflection Mode Measurement
Learn more about these two measurements in the Supplemental Online Help:
http://na.support.keysight.com/fieldfox/help/SupHelp/FieldFox.htm
—Press Measure 1
— Then choose one of the following: These softkeys also appear after
Reflection Mode is selected.
— Return Loss
1-port scalar reflection measurement that displays the
amount of incident signal energy MINUS the amount of energy that is
reflected. The higher the trace is on the screen, the more energy
being reflected back to the FieldFox.
— VSWR
(Voltage Standing Wave Ratio – also known as SWR) 1-port
reflection measurement that displays the ratio of the maximum
reflected voltage over the minimum reflected voltage. The higher the
trace is on the screen, the more energy being reflected back to the
FieldFox.
Normalize
Normalization can be used to effectively ‘Zero’ a trace, which removes
frequency response errors introduced by the components of the test setup
before making the measurement. To normalize a reflection measurement, the
DUT is removed and a known device is connected to Port 1. When you choose
Normalize, the displayed trace is stored into memory and then the displayed
data is divided by the memory trace. The displayed data trace now shows the
difference between the stored memory response and the measured response.
You could normalize while measuring the reflection response of any type of
device. For example, the device could be:
— An Open or Short (with maximum reflection)
How to perform Normalization
To Port 1, connect a known device (usually an Open or Short) to which
reflection measurements are to be normalized.
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