| 摘要 |
FIELD: devices for communications, transmission of digital signals between channel and group formation equipment on one side and transceivers of satellite relay transmission systems, equipment of user-side line of cable digital and fiber-optical transmission lines on another side. SUBSTANCE: device has encoder and decoder which are connected to communication line, input converter which is inserted between communication line and encoder. Input converter has flip-flop, power amplifiers, transformer with middle tap. Another claim of invention describes device design in which converter in addition has detector of clock frequency, and clock oscillator, which is connected to second inputs of comparison circuit, which first inputs are connected to outputs of flip-flop. Output converter has transformer with middle tap, delay line and adder. Another claim of invention describes device design in which converter in addition has input amplifier and clock frequency detector. Device provides possibility to increase level of output signal by 9 dB. Device may be used in design of new devices as well as in mass produced devices without need for redesign. EFFECT: length of communication line is almost doubled, number of retransmitters is decreased. |
