TDV_GENDAC_REFFREQ
mdbl = (2 * freq * (1 << n2)*(n1 + 2)) / TDV_GENDAC_REFFREQ - 4;
fout = (TDV_GENDAC_REFFREQ * (m + 2)) / ((1 << n2) * (n1 + 2));
fout = (TDV_GENDAC_REFFREQ * (best_m + 2)) / ((1 << n2) * (best_n1 + 2));