Distress call transmitter module and encoding method thereof

The invention relates to a distress call transmitter module and an encoding method thereof, and can solve problems of serious influences of severe environment and poor quality performance in the prior art. The key points of the technical are as follows: the distress call transmitter module comprises a voltage stabilizing circuit, a transmitter antenna, a connection port, a frequency adjusting circuit, a radio frequency amplifying circuit, a feedback control circuit and a lowpass filtering circuit, wherein the input end of the frequency adjusting circuit is connected with a processor module through the connection port, the output end of the frequency adjusting circuit is connected with the input end of the radio frequency amplifying circuit, and the output end of the radio frequency amplifying circuit is connected with the transmitter antenna through the lowpass filtering circuit; and the input end of the feedback control circuit is connected with the processor module through the connection port, the feedback input end of the feedback control circuit is connected with the lowpass filtering circuit, and the control output end of the feedback control circuit is connected with the control end of the radio frequency amplifying circuit. A chart plotter product with the distress call transmitter module can meet performance and quality requirements of a C class standard, and is small in size, portable and simple and easy to operate and use.