YBA250 Antenna and Transmission Line Analyzer User Manual

Calibration and Normalization
Normalizing the YBA250
Normalization generates measurement correction data to compensate
for signal source variations, test cable and attenuator losses, and
cable/attenuator reflections, for two-port measurements. Normalization
data (Default or User) must be loaded before you can perform
accurate two-port insertion gain or loss measurements.
There are two types of normalization: Default and User. The Default
normalization data set covers the entire YBA250 frequency range
(30 MHz to 2500 MHz) and all signal source levels (+3dBm to
-60dBm). This provides a general baseline measurement reference
across all frequencies and signal levels. Default normalization
provides good measurement accuracy across all frequencies any time
a User normalization is not available or is not valid.
The User normalization data set covers a specified frequency range
and output power level, based on the instrument settings when the
User normalization data was created. A User normalization provides
the most accurate measurements.
Both Default and User normalizations generate correction data using
precision cables and attenuators connected between the YBA250 and
the YBT250 modules. The normalization data, plus instrument state
information (such as date/time and internal module temperature), is
saved to non-volatile memory.
The Normalization Window Elements
The Normalization window is where you select which type of
normalization to use (Default or User), create a new Default or User
normalization, save normalization data to a file, or load a saved
normalization set.
To display the two-port Normalization window, tap the Normalization...
button while in the Insertion Gain/Loss window. Figure 2-15
shows the Normalization window. Table 2-13 describes the contents
of the Normalization window.
2-40 YBA250 Antenna and Transmission Line Analyzer User Manual