通信测试仪表 维修 销售 租赁
The PCM signal generator is designed for testing CCITT-recommended 30-channel PCM systems(Recommendation G.732-2048 kbit/s) when the exchange is out of service. Testing is performed at different levels of the exchange hierarchy using different codes. The PCM signal generator supplies frame and multi-frame alignment signals together with signals in the telephone channels. Alarm signals and error signals can be simulated by the instrument.
The PCM signal generator generates the 2048-kbit/s frame and multiframe structure according to CCITT recommendation G.732. The following parameters can be set by the instrument:
The line parameters can be programmed by the user in accordance with individual requirements. The line parameters consist of :
The telephone channel signal can be applied to any of the 30 telephone channels,and the others are set at an ‘idle’condition. The tollowing signals can be applied:
ERROR SIGNAL PARAMETES
The error signal simulates error conditions in the digital signal.The following error signals may be applied:
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