[Discuss-gnuradio] file transmission with GRC question

[William Cox]

Howdy,

I'm playing around with GRC and trying to transmit a file between two computers (based on Alex Csete's video streaming GRC code).

Transmitter:

USRP1 + LFTX

GRC:

File Source -> Packet Encoder -> GMSK -> Const. Multiply -> USRP sink

Receiver:

USRP1 + LFRX

GRC:

USRP Source -> LPF -> GMSK Demod -> Packet Decoder -> File Sink

I can run the programs (Rx first, then Tx) and I receive the file, but *slightly* smaller than the transmitted file.

The file being transmitted is 2 MB of /dev/urandom and the received file is 8.192e3 bits smaller than the transmitted file.

Any ideas as to where those bits went? Were they lost during synchronization? 

Thanks.

-William