| 摘要 |
PURPOSE: A signal generating device for testing an IPC(Inter-Processor Communication) path in an exchange is provided to generate a signal for testing faults of an exchange IPC path, and to reproduce the situation of external noise inputted to an IPC path, the interference between signals passing the IPC path, a reflected wavelength of the IPC path. CONSTITUTION: A clock generator(100) comprises a clock divider(101), coupling resistances(R101,R102,R103) and a clock buffer(102), and generates a clock corresponding to external noise. A control signal generator(110) comprises a pull-up resistance(R112) and switches(S111,S112,113,S114), and generates a control signal for controlling an output of a differential driving circuit. Coupling resistances(R104-R111) inputs a noise signal driven in differential to an IPC(Inter-Processor Communication) cable.
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