| 摘要 |
<p>PURPOSE:To inform failures, by immediately generating the call out signal at the reception side, through the provision of the reception section having the call out signal generator at the master and slave unit, when the carrier from the transmission side is not received. CONSTITUTION:The carrier generating units 6X and 6Y transmit the carrier to the receiving end with normal operation, the transmission sections 2X, 2Y modulate 7X, 7Y the carrier with audio signal to perform transmission, and the reception sections 2X, 3Y receive the carrier. When the carrier from the transmission side is not received, call out signal is transmitted with the call out signals generator 13X, 13Y, the reception section 3X, 3Y having the units 13X, 13Y, are provided with the master X and slave unit Y to perform communication between the master X and slave unit Y. Thus, even if the carrier is stopped with failure, the call out signal is immediately generated at the reception side to inform the failure.</p> |
