Instrument Function
R&S
®
SMF100A
216
Operating Manual 1167.2319.02 ─ 12
The reference curve consists of a certain number of coordinate points, calculated by
the number of steps + 1. The first coordinate point starts at Min, and Max is the last.
"Step", "Min" and "Max" are determined in the configuration dialog, see
Tip:
You can assign the X and Y coordinates of the markers automatically in marker
view. By selecting "Fill Point", the function automatically reads the X and Y coordinates
from the trace data and derives the intersection point of the selected marker and the
trace curve.
Mathematics - Trace Power Analysis
Activates the mathematic function.
The function enables you to determine the deviation of two test series, either of mea-
surement traces, or also of traces that contain math results or stored reference curves.
That means you can also assign a math result to an operand for further calculation.
Various nested computation steps are possible.
The math operation follows the formula:
T<ch>
result
= T<ch>
Operand1
- T<ch>
Operand2
How to proceed:
Determine T<ch>
Operand1
in the entry field next to "Tx", and then select T<ch>
Operand2
in
the second entry field right to it.
The result ("T<ch>
result
") is assigned to the above selected "Trace". If switched on, the
graph shows the resulting curve.
Note:
Depending on the type of trace, the instrument automatically sets the appropriate unit
on the y-axis:
●
"dBm" if it shows only measurement traces.
●
"dB" for purely mathematical curves.
●
"dB/dBm" ratio scale for mixed display, that means measurements and mathemati-
cal curves.
Example:
Example of a nested calculation.
●
T1 shows the result of the subtraction of the trace ("Trace 1"), and the reference
curve.
●
Trace2 subtracts Ref from T1.
That illustrates the nested calculation, since T1 covers already a math operation.
Note:
"(Ind.)" denotes the currently selected trace.
Remote command:
:CALCulate[:POWer]:SWEep:FREQuency:MATH<ch>:STATe
:CALCulate[:POWer]:SWEep:FREQuency:MATH<ch>:SUBTract
RF Level
