This attribute defines which of the OPT tests are to be run by the CM. The tests are encoded as individual bits according to rxMerSubCarrierStats(0) RxMER Statistics per Subcarrier rxMerSubCarrierThreshComp(1) RxMER per Subcarrier Threshold Comparison for Candidate Profile snrMarginCandidateProfile(2) SNR Margin for Candidate Profile codewordStats(3) Codeword Statistics for Candidate Profile codewordThreshComp(4) Codeword Threshold Comparison for Candidate Profile ncpFieldStats(5) NCP Field statistics ncpCrcThreshComp(6) NCP CRC Threshold Comparison reserved(7) Reserved other(8) Placeholder for vendor extensions When a given bit is set then that test will be performed by the CM. Note that the tests rxMerSubCarrierThreshComp(1), snrMarginCandidateProfile(2) require entries in the OptMerThreshold object for these tests to be performed. This attribute corresponds to TLV 1 in the OPT Request message.