A remote transmission device for controlling user equipment by adopting circuit-parameter differentiation techniques

摘要

In a transmission apparatus for the service management circuit parameters are diversified into two parallel output channels with different responses to frequency variations. In particular, the practical output is being examined with two amplifiers have different circuit parameters. This is to produce different quality coefficients and from which a signal generator installed so that the service being managed is transmitted over the line, for example an electric, telephone line or other transmission channels, as a fixed steady frequency signal. When a bit of information is to be transmitted, there is a slight variation to the signal frequency transmitted. The output that is generated is analyzed with a microprocessor technic at the output of a summary circuit, that sums up the output signals of the two amplifiers. The microprocessor is then able to decide, analyzing the sum of the signal modulation, the presence of a transmitted bit, that is subsequently detected by the impulse detector attached to the output of the microprocessor