For RJ45&BNC Test by cables of the Same BNC Axes: 1.Put one end of the cable into both main tester and BNC socket,and put the other into the remote tester. 2.Switchin the power,which works if the light is on. 3.BNC light will not be on when the cable is connected.Any flash of the light means an improper cable is connected. 4.Press the button on the left of the main tester.If the light is green,the cable works;if not(means red or any othercolor of light),the cable is out of work. Test by Twin-twisted Cables: 1.Put one end of the cable into the main tester. 2.Switch on the power,which works if the light flashed. 3.Once switched on,LEDS of the remote tester will scan the cable accordingly.If the cables are good,the corresponding LEDS will turn green sequently.If the cables are outof work,the LEDS will first turn green then red or other others,or the LEDS will not be on or be on disorderly. 4.If the cables are shielded,shieldingis tested when GND is turned on.If shielding is normal,the corresponding LEDS and GND will turn green.If not ,the LEDS will first become green then ted or will not be on at all. Attention: 1.251451 Twin-end:can test cables of the same BNC axes and double-twisted cables. 2.251452 Single-end:the two ends of one cable can be connected to the main tester for test for test if remote tester is not applied. 3.252452 Synchro:when test is done by both main tester,only connectin or open circuit can be seen from the main tester while opposite connection or short circuit is displayed by the remote tester.Red light means opposite connection and non-light means open circuit.Whentest is done by main tester exclusively,only connectin of the cables can be seen while opposite connection cannot.