This paper considers a model  describing the dynamics of a  Transmitter-receiver
system in communication  engineering. The bifurcation  structure is analyzed  to
define the nature of  the bifurcations exhibited by  the system. One does  found
both the complex dynamical behavior of the system and its extreme sensitivity to
tiny  changes  in  the  model  parameters.  Crisis,  Period-doubling  and   Hopf
bifurcation are  also found.  An analog  simulation of  the Transmitter-receiver
system is  carried out.  Some experimental  phase portraits  are obtained.  Both
regular and chaotic modulations of the incoming message are done experimentally.
A comparison of  the results obtained  from experimental and  numerical analysis
shows a very good agreement.