This object represents the point in the system where the data signal is looped back. none(0) - no loopback codec(1) - loopback at the Encoder/Decoder module. This exercises the framer, and codec modules framer(2) - loopback at the 'framer' module. fir(3) - loopback at the 'Finite Impulse Response' module. This exercises the framer, codec, and FIR modules. if(4) - loopback at the 'Internal Frequency' module using both the main and the diversity receive paths. This exercises the framer, codec, FIR, and IF modules. rf(5) - loopback at the main RF unit via the main receive path in the IF module. This exercises the framer, codec, FIR, IF, and RF modules. rfDiversity(6) - loopback at the main RF unit but route it through the diversity receive path in the IF module. This exercises the framer, codec, FIR, IF, and RF modules. ifMain(7) - loopack at the IF module using only the Main receive path. This exercises the framer, codec, FIR, and IF modules. ifDiversity(8) - loopack at the IF module using only the diversity receive path. This exercises the framer, codec, FIR, and IF modules.