Hi, All.
I would like to know about following. If you know please help me!!!
Question:
500m common communication cable (TPP 10x2x0.5) is connected directly to the amplifier filter etc (charge amp) without any external power supply. If there is some external forces about 6-20Kg on the cable, amp senses that intrusion occurs on the cable. But I dont understand how to sense cable signal. I think, op-amp senses the difference of the cable capacitance. But there is no any power supply in cable. Is it right?
I would like to know about following. If you know please help me!!!
Question:
500m common communication cable (TPP 10x2x0.5) is connected directly to the amplifier filter etc (charge amp) without any external power supply. If there is some external forces about 6-20Kg on the cable, amp senses that intrusion occurs on the cable. But I dont understand how to sense cable signal. I think, op-amp senses the difference of the cable capacitance. But there is no any power supply in cable. Is it right?