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Common spare switching system

阅读:822发布:2023-04-19

专利汇可以提供Common spare switching system专利检索,专利查询,专利分析的服务。并且PURPOSE: To prevent mis-alarm from a phase modulation panel even when a spare line sends a frequency modulation signal by providing a pseudo signal generating means and a detection means of a pseudo signal in a relay station of a microwave communication line.
CONSTITUTION: When a frequency modulation signal is sent through a spare line, a pseudo signal formed by a pattern generator 1f and a base band processing panel 1g
2 is inserted to a phase modulator 1c by a switch 1i. The pseudo signal is modulated by the phase modulation panel 1c and sent to a phase demodulation panel 1b by signal switches 1h
2 , 1h
1 . The signal demodulated by a phase demodulation panel 1b passes through the base band processing panel 1g
1 again by the signal switch 1i, and the pseudo signal is detected by a pattern detector 1e. Even when the spare line sends the frequency modulation signal, since the pseudo signal is inserted in the phase modulation panel, no mis-alarm is caused from the phase MODEM panel.
COPYRIGHT: (C)1987,JPO&Japio,下面是Common spare switching system专利的具体信息内容。

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