| 摘要 |
A number of amplitude converters (1) in a telecommunication system are supervised during the normal operation of the system by means of three comparison arrangements (4, 6, 9). The first and the second of the comparison arrangements has its inputs (5 and 7) connected to the inputs and the outputs, respectively, of two of the converters. The third comparison arrangement (9) has its inputs (8) connected to the outputs of the first and the second comparison arrangement and generates an alarm signal if the first comparison arrangement (4) signals a relation between two supervised in-signals, which deviates acceptably from a comparison result set value, and if the second comparison arrangement (6) signals a relation between the two out-signals which deviates unacceptably from a set value. The maximally accepted deviation from the set value of the second comparison arrangement is chosen taken into account the operation tolerance limits of the converters and to the maximally accepted deviation of the first comparison arrangement which is determined so that a smooth supervision is obtained. |
