The mixed signal is coupled through a demultiplexer to respective inputs of first, second, third and fourth low pass filters, {HEAD ~ each} of which has {TAIL ~ a cut} off frequency which is one half of the decoder passband 
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The mixed signal is coupled through a demultiplexer to respective inputs of first , second , third and fourth low pass filters , { HEAD ~ each } of which has { TAIL ~ a cut } off frequency which is one half of the decoder passband
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH