:MEASure:EYE:PAM:RMS

Command Syntax

:MEASure:EYE:PAM:RMS

Query Syntax

:MEASure:EYE:PAM:RMS?

Description

Starts the PAM Level RMS measurement, which measures the "thickness" of a selected level of a PAM eye diagram. On NRZ signals, the thickness of both level zero and one are measured. Select the actual level to be measured using the :MEASure:EYE:PAM:RMS:LEVel child command. To measure all the levels on a signal, you must send this command once for each level as there is no command for simultaneously measuring all levels. The query form of the command returns the measured value.

Use the :MEASure:EYE:PAM:RMS:SOURce command to specify the real-time eye diagram on which to make the measurement.

Related Commands

Command	Equivalent Setting in PAM-N Analysis Setup Dialog Box	Description
:MEASure:PAM:EYE:ESTiming	Receiver Sample Timing	Configures the timing for sampling the signal data for all PAM measurements. Depending on measurement conditions, this command may not affect the measurement.
:MEASure:PAM:EYE:ELMethod	Eye Center Location	Selects the basis for determining the location of an eye's center on the waveform: at maximum eye width or maximum eye height. Depending on measurement conditions, this command may not affect the measurement.
:MEASure:PAM:EYE:PPERcent	Eye Level Width	Defines the timespan (in percentage of symbol width) over which an eye's amplitude level is measured.
:MEASure:PAM:EYE:TIME:LTDefinition	Time of Level	Specifies the method used to locate the time at which to measure an eye's level.
:MEASure:PAM:AMPLitude:UNITs	Amplitude Units	Sets the amplitude units for measurement: volts, Watts, or percent.

Example Command Sequence

:CHANnel1:SIGNal:TYPE PAM4  //  Specify signal type, if needed.
:SYSTem:AUToscale
:MEASure:EYE:PAM:RMS:SOURce ECHannel1
:MEASure:EYE:PAM:RMS:LEVel LEVel2  //  Select logic level to be measured.
:MEASure:EYE:PAM:RMS  //  Measure and return value.
:MEASure:EYE:PAM:RMS?