I would like to ask how the video surveillance camera is powered?
You are right, video surveillance cameras used to make a signal with a coaxial line, and then another line when the power supply, but the two lines can also be a line to achieve. That is to use control Because the control line is a double core, with a shield, we can put the video ground, and the power of the negative line, together, sharing a line, that is, the control line of the shield, and then Inside the two core, one when the video signal is positive, one when the power is positive. This can, but if the distance is very long, it is recommended not to do so, because of this, the signal shielding will be a little interference.
??Wiring, or to use two lines of good, if their own home, then, with a control line does not matter, but to the customer with the words, or two good, so look more professional, the probability of the problem comparison Smaller.
???You can use a centralized power supply, so easy to manage. You can go to the market to buy an equivalent voltage, but the power is much larger power module, and then put all the cameras Of the power lines are connected, (positive to the lower, negative to the negative, must not be reversed) and then unified connected to the power module.
