Rohde & Schwarz FSW13, Руководство пользователя

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Measurements
R&S
®
FSW
282 User Manual 1173.9411.02 ─ 19
The remote commands required to perform these tasks are described in chap-
ter 11.5.11, "Measuring the Third Order Intercept Point" , on page 799.
Marker 1/2/3/4 ............................................................................................................. 282
Search Signals ............................................................................................................ 282
Marker 1/2/3/4
Indicates the detected characteristic values as determined by the TOI measurement
(see
chapter 5.11.3, "TOI Results" , on page 280).
The marker positions can be edited; the TOI is then recalculated according to the new
marker values.
To reset all marker positions automatically, use the Search Signals function.
Remote command:
CALCulate<n>:
​
MARKer<m>:
​
X
​
on page 932
CALCulate<n>:
​
DELTamarker<m>:
​
X
​
on page 931
CALCulate<n>:
​
DELTamarker<m>:
​
X:
​
RELative?
​
on page 942
Search Signals
Performs a new search on the input signals and recalculates the TOI according to the
measured values.
Remote command:
CALCulate:
​
MARKer:
​
FUNCtion:
​
TOI:
​
SEARchsignal ONCE
​
on page 800
5.11.5 How to Determine the Third Order Intercept
The precise TOI for the R&S FSW in relation to the input signals is provided in the data
sheet.
1. Apply a two-tone signal with equal carrier levels to the R&S FSW input.
2. On the R&S
FSW, press the MEAS key.
3. Select the "Third Order Intercept" measurement function from the "Select Measure-
ment" dialog box.
The calculated TOI is indicated in the marker information. The markers required for
calculation are displayed in the marker table.
4. If the signal changes significantly during or after the TOI measurement, use the
"Search Signals" function to start a new signal search automatically and restart the
calculation of the TOI.
Third Order Intercept (TOI) Measurement