3 Spectrum Analyzer Mode
3.10 TOI Measurement
3.10 TOI Measurement
IMPORTANT
This measurement is not supported in VXT models M9410A/11A/15A/16A.
The TOI measurement allows a simple (one-button) measurement of the third-order
intercept of a two-tone signal. It also allows a more accurate (zero-span)
measurement of that signal.
Measurement Commands
These commands are used to initialize the measurement, and to retrieve results.
All returned frequencies are affected by Frequency Offset, and all absolute
amplitudes are affected by Ref Level Offset. Amplitudes are returned in dBm
regardless of the Y Axis Unit.
For more information see "Measurement Details" on page 1757.
For measurement results and views, see "Views" on page 1758.
The general functionality of "CONFigure" on page 2753, "INITiate" on page 2754,
"FETCh" on page 2754, "MEASure" on page 2756, and "READ" on page 2755 are
described in the section SCPI Operation and Results Query in the topic
Programming the Instrument.
:INITiate:TOI
Initiates a trigger cycle for the measurement, but does not return any data
Does not change any measurement settings
:CONFigure:TOI
Selects the measurement with Meas Setup settings in their preset states. This is the
same as "Meas Preset" on page 1831
:CONFigure:TOI:NDEFault
Selects TOI measurement without affecting settings
:CONFigure?
Returns the name of the measurement: TOI
The following queries are used to retrieve data. The type of data returned depends
on the value of n.
Command n Return Value
:FETCh:TOI[n]?
:MEASure:TOI[n]?
:READ:TOI[n]?
0 Returns the trace data, in interleaved X/Y pairs
:FETCh:TOI[n]?
:MEASure:TOI[n]?
:READ:TOI[n]?
1 Returns 6 scalar results, in the following order
Spectrum Analyzer Mode User's &Programmer's Reference 1755
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