Second Radio Maximum locked MCS rate. For hw 802.11n: 1..7 for SS and 9..15 for DS MCS is used. For hw 802.11ac: Next formula is used NSS (For SS - 1, For DS - 2 ) * 10 + MCS 20 for 'SS MCS 0 - BPSK 1/2', 21 for 'SS MCS 1 - QPSK 1/2', 22 for 'SS MCS 2 - QPSK 3/4', 23 for 'SS MCS 3 - 16-QAM 1/2', 24 for 'SS MCS 4 - 16-QAM 3/4', 25 for 'SS MCS 5 - 64-QAM 2/3', 26 for 'SS MCS 6 - 64-QAM 3/4', 27 for 'SS MCS 7 - 64-QAM 5/6', 28 for 'SS MCS 8 - 256-QAM 3/4', 29 for 'SS MCS 9 - 256-QAM 5/6', 30 for 'DS MCS 0 - BPSK 1/2', 31 for 'DS MCS 1 - QPSK 1/2', 32 for 'DS MCS 2 - QPSK 3/4', 33 for 'DS MCS 3 - 16-QAM 1/2', 34 for 'DS MCS 4 - 16-QAM 3/4', 35 for 'DS MCS 5 - 64-QAM 2/3', 36 for 'DS MCS 6 - 64-QAM 3/4', 37 for 'DS MCS 7 - 64-QAM 5/6', 38 for 'DS MCS 8 - 256-QAM 3/4', 39 for 'DS MCS 9 - 256-QAM 5/6', For hw 802.11ax: 192 for 'SS MCS 0 - BPSK 1/2', 193 for 'SS MCS 1 - QPSK 1/2', 194 for 'SS MCS 2 - QPSK 3/4', 195 for 'SS MCS 3 - 16-QAM 1/2', 196 for 'SS MCS 4 - 16-QAM 3/4', 197 for 'SS MCS 5 - 64-QAM 2/3', 198 for 'SS MCS 6 - 64-QAM 3/4', 199 for 'SS MCS 7 - 64-QAM 5/6', 200 for 'SS MCS 8 - 256-QAM 3/4', 201 for 'SS MCS 9 - 256-QAM 5/6', 202 for 'SS MCS 10- 1024-QAM 3/4', 203 for 'SS MCS 11- 1024-QAM 5/6', 204 for 'SS MCS 12- 4096-QAM 3/4', 205 for 'SS MCS 13- 4096-QAM 5/6', 208 for 'DS MCS 0 - BPSK 1/2', 209 for 'DS MCS 1 - QPSK 1/2', 210 for 'DS MCS 2 - QPSK 3/4', 211 for 'DS MCS 3 - 16-QAM 1/2', 212 for 'DS MCS 4 - 16-QAM 3/4', 213 for 'DS MCS 5 - 64-QAM 2/3', 214 for 'DS MCS 6 - 64-QAM 3/4', 215 for 'DS MCS 7 - 64-QAM 5/6', 216 for 'DS MCS 8 - 256-QAM 3/4', 217 for 'DS MCS 9 - 256-QAM 5/6', 218 for 'DS MCS 10- 1024-QAM 3/4', 219 for 'DS MCS 11- 1024-QAM 5/6', 220 for 'DS MCS 12- 4096-QAM 3/4', 221 for 'DS MCS 13- 4096-QAM 5/6', Default allocation: AP, SM.