Using a Framer and a Correlator?

I’m adapting the Digital Bert example to pass data in a loopback. I’m
trying to set a framer and a correlator to take a text file and break it
up
in packets and then transmit it to the other side and write it to a text
file. The following are the blocks of my flow graph. Any suggestions
or
thoughts?

FileSource(text file)->simpleFramer->Scrambler->ChunksToSym->RRC
filter->constellationDecoder->descramble->simpleCorrelator->FileSink(text
file)

The following is known to work:

RandomSource->Scrambler->C2S->RRC
filter->constellationDecoder->descramble->simpleCorrelator-|

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|_____>|

|
| Error Rate ~ 0%

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