103 SNA5000A Vector Network Analyzer User Manual
and the directivity is not the measurement parameter of the vector network analyzer, then the
formula editor can be used to complete the measurement, and the result is the sum and
difference of the traces in logarithmic amplitude format, that is S12 + S23 - S13. Because the
formula editor operates on linear complex data, the actual required formula is S12 * S23 / S13.
Finally, the vertical axis format is set to logarithmic amplitude for display. The operation
steps of the equation editor are as follows:
1. Click
Math
→
Analysis→Equation Editor
enter the equation editor interface.
Figure 4-4 Formula editor interface
2. In the formula edit box, enter functions, operators, and data to form the formula.
3. After setting the formula, click OK to exit the formula editing interface and click
the
Equation
status to On to take effect.
Introduction to formula editor interface:
⚫
Enable
: Select the box to enable the currently entered formula, and clear the box to
disable the currently edited formula. If the data traces used are from other
channels instead of formula traces, these channels must have the same
number of data points to be valid channels.
⚫
Functions and Constants
: It stores some commonly used functions and constants,
as well as other functions set by the system.
⚫
Parameter
: Select the items that need to be measured only from the working
channel.
⚫
History Equation
: Used to save previously-stored formulas.
⚫
Store Equation
: Store the current input formula to facilitate subsequent use.
Summary of Contents for SNA5000A Series
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