Chapter 7 Transmission Operation
Setting up the trace
9102 Handheld Spectrum Analyzer Software version 5.31
131
Adding trace B to trace
A
If you have used two different trace views, you can also show the sum
of
trace A and trace B by adding the two traces as follows:
1 In the Trace menu select the softkey
Trace Function followed by the
softkey
Add A+B–>A.
2 Select
on to add B to trace A. On the left-hand side of the result
area the term “Add“ will now be displayed to indicate that a mathe-
matical function is being performed.
3 The result is displayed in trace A.
Trace Offset As soon as you use one of the two mathematical functions, Subtract
A+B
A or Add A + B A, the Trace Offset function is activated.
You can use this function to adjust the trace display, if the mathematical
calculation performed causes the resulting trace to move outside the
display area. In order to bring the trace back into view, use the Trace
Offset softkey to modify the offset value until the trace moves back into
the display area.
Defining the number of
measurements for
averaging
When the trace mode is set to averaging, it may be useful to adjust the
number of measurements over which the 9102 averages the results.
The average count value that can be defined in the Trace menus
applies to both traces alike.
The 9102 uses a recursive algorithm in which a new result is added to
the older averages with a weighting factor; the description below indi-
cates how to change this weighting factor.
1 Select the Trace menu (select
Trace > Trace A or Trace B from the
main menu).
2 Push the
Average Count softkey.
The Average input field opens.
3 Enter the number of measurements over which to average the
results, in the range from 2 to 128.
4Press E
NTER.
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