Portion of the CD₃OH microwave spectrum dominated by one v_t = 0 Q-branch and two R-branches from the v_t = 1, 2 excited torsional states in the 388.75−389.55 GHz range. The observed spectrum is shown in the lower panel and the calculated one in the upper panel. The experimental frequencies and the intensity pattern are rather well reproduced by our model for the spectral features dominating this frequency range, although for some v_t = 2 E type transitions (see e.g., K = 4, J = 10 ← 9 transition near 388 859 MHz), there are noticeable shifts in frequency with respect to our predictions. The J and selected K quantum numbers are given at the top and the bottom of the upper panel for the dominant spectral branches. We note that for A type transitions of the R branches the K quantum number stands for a degenerate pair of K± transitions in all cases except K = 0,1,2,2- in the v_t = 1 state and K = 0 in the v_t = 2 state.