Improving level performance
R&S
®
SMA100B
252User Manual 1178.3834.02 ─ 09
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 on page 494
:CALCulate[:POWer]:SWEep:FREQuency:MATH<ch>:SUBTract on page 495
:CALCulate[:POWer]:SWEep:POWer:MATH<ch>:STATe on page 496
:CALCulate[:POWer]:SWEep:POWer:MATH<ch>:SUBTract on page 496
:CALCulate[:POWer]:SWEep:TIME:MATH<ch>:STATe on page 499
:CALCulate[:POWer]:SWEep:TIME:MATH<ch>:SUBTract on page 500
Define reference NRP-Z analysis settings
Access:
1. Select "Clk Syn/Power Sens" > "NRP-Z Power Analysis".
2. Select a power sensor at the bottom of the power analysis main screen.
The traces dialog opens.
3. Select a "Trace" tab.
Using power sensors
To Next Page
Loading...
