This attribute, when set to 'true', causes the CM to begin a Spectrum Analysis measurement with the parameters defined by the docsIf3CmSpectrumAnalysisCtrlCmd set of attributes. In order to set this object to 'true', the Enable must already be set to 'true'. When the measurement is completed successfully, a file is generated and is made available for transfer and the MeasStatus attribute is set to 'sampleReady'. The file will contain one complete snapshot of the spectrum data. Setting this object to a value of 'false' instructs the CM to stop the measurement. Interaction with other table rows: - This object is subject to the rules specified by the 'docsPnmCmCtlStatus' object. Therefore this object returns 'inconsistentValue' if set to 'true' while the value of 'docsPnmCmCtlStatus' is any value other than 'ready'. - This object returns 'inconsistentValue' if set to 'true' while the CM is unable to perform a spectrum measurement for any reason. Examples might include DOCSIS Light Sleep (DLS) mode or battery-backup mode. - A default value for 'docsIf31CmSpectrumAnalysisCtrlCmdFileName' is defined; thus, this object may be set to 'true' without explicitly setting this value. - Setting this object to a value of 'true' will change the value of the 'docsIf31CmSpectrumAnalysisCtrlCmdMeasStatus' to 'busy'. After completion, 'docsIf31CmSpectrumAnalysisCtrlCmdMeasStatus' will be changed to reflect the status of the test. -This object will return a value of 'true' if it is actively taking a measurement; otherwise it returns 'false'.