Keyboard data

hi all,

    I'm doing my thesis on underwater communication using

gnuradio.i would like to know whether we could pass data to a GRC
flowgraph from a keyboard and transmit simultaneously.also when i’m
transmitting some text from a file using gmsk modulation and
i’m receiving the file only when the source file is in repeat
mode.otherwise the destination file seems to be flow graph is;

file source - packet encoder - gmsk modulator - gmsk demodulator -
packetdecoder -file sink.

please any one help me urgently…

anju babu