Rohde & Schwarz R&S FSP Series, Operating Manual

Page: 458 / 796

R&S FSP Remote Control – Description of Commands
CALCulate Subsystem
6.64 Operating Manual 1164.4556.12 - 06
CALCulate<1|2>:MARKer<1...4>:FUNCtion:TOI:MARKer CALCulate | SEARch
This command controls the positioning of the intercept markers 3 and 4 for TOI measurement, based
on the two carrier signals.
• CALCulate:
Calculates the intermodulation product frequencies.
• SEARch:
Performs a local peak search near the expected intermodulation product frequencies.
Example:
"CALC:MARK:FUNC:TOI:MARK SEAR"
' selects TOI marker search mode
Characteristics: *RST value: CALC
SCPI: device-specific
Mode: A
CALCulate<1|2>:MARKer<1...4>:FUNCtion:TOI:RESult?
This command queries the third-order intercept point measurement in the indicated measurement
window.
A complete sweep with synchronization to sweep end must be performed between switching on the
function and querying the measured value to obtain a valid query result. This is only possible in single-
sweep mode.
The numeric suffix <1...4> of :MARKer is irrelevant of this command.
Example:
"INIT:CONT OFF"
'Switches to single-sweep mode.
"CALC:MARK:FUNC:TOI ON"
'Switches the intercept measurement in screen A.
"INIT;*WAI"
'Starts a sweep and waits for the end.
"CALC:MARK:FUNC:TOI:RES?"
'Outputs the measured value of screen A.
Characteristics: *RST value: -
SCPI: device-specific
Mode: A
This command is only a query and therefore has no *RST value.
CALCulate<1|2>:MARKer<1...4>:FUNCtion:TOI[:STATe] ON | OFF
This command initiates the measurement of the third-order intercept point.
A two-tone signal with equal carrier levels is expected at the RF input of the instrument. Marker 1 and
marker 2 (both normal markers) are set to the maximum of the two signals. Delta marker 3 and delta
marker 4 are positioned to the intermodulation products. The delta markers can be modified separately
afterwards with the commands
CALCulate:DELTamarker3:X
and
CALCulate:DELTamarker4:
X
.
The third-order intercept is calculated from the level spacing between the normal markers and the delta
markers.
The numeric suffix <1...4> of :MARKer is irrelevant for this command.