+ enum { REALVAL, REGVAL };
+ const long CN_lookup[31][2] = {
+ {20,8900}, {25,8680}, {30,8420}, {35,8217}, {40,7897},
+ {50,7333}, {60,6747}, {70,6162}, {80,5580}, {90,5029},
+ {100,4529}, {110,4080}, {120,3685}, {130,3316}, {140,2982},
+ {150,2688}, {160,2418}, {170,2188}, {180,1982}, {190,1802},
+ {200,1663}, {210,1520}, {220,1400}, {230,1295}, {240,1201},
+ {250,1123}, {260,1058}, {270,1004}, {280,957}, {290,920},
+ {300,890}
+ };
+ int add=strchr(m_description, '.') ? 0xA250 : 0xA100;
+ long regval = 0xFFFF - ((snr / 3) + add), // revert some dvb api calulations to get the real register value
+ Imin=0,
+ Imax=30,
+ i;
+ if(INRANGE(CN_lookup[Imin][REGVAL],regval,CN_lookup[Imax][REGVAL]))