COUPLING ATTENUATION TEST

STANDARD：IEC 62153-4-9:2018+AMD1:2020 1. Strip the 4.5cm jacket at the left end of the cable sample to expose the shielding layer of the cable, be careful not to damage the shielding layer. 2. Strip the jacket (clamping area) 10cm to 14cm away from the leftmost end of the cable sample to expose the shielding layer of the cable. Be careful not to damage the shielding layer. 3、Separate the pairs and strip the insulation of a single conductor by 4mmUse a multimeter to check whether the outer surface of the shielding layer is conductive 4. Strip the jacket (signal lead-out area) 336cm to 340cm away from the left end of the cable to expose the shielding layer of the cable. 5. Wrap the copper wire tightly on the conductive surface of the signal lead-out area, and reserve a length of about 1.5cm. 6、Strip the 6.5cm jacket at the right end of the cable sample to expose the shielding layer of the cable. 7、Separate the pairs and strip the insulation of a single conductor by 4mm 8、Pass the left end of the cable sample through the RF signal absorber first, and penetrate the test tube body along the open tube coupling tube body toward the main test tube body. 9. Put the rest of cables into the metal shielding box. 10电缆末端的线对，分别接平衡信号匹配模块的负载 11 The pairs at the end of the cable are respectively connected to the load of the balanced signal matching module. 11、Choose a suitable size semi-circular pressing block, clamp the cable clamping area on the clamper of the main test tube, press the cable to be tested, and fix it with the butterfly knob. 12、 Turn over the shielding layers at both ends of the cable to ensure that the conductive side is below the wire pair. Connect the line to be tested to the "test wire pair" position of the balanced signal output module, and connect the remaining wire to the matching load 13、Weld the copper wire on the inner conductor of the N-type adapter of the switch coupler. 14、The network analyzer has two ports PORT1 and PORT2. The two ports lead out two measurement lines respectively. Connect the measurement line from the PORT1 port to the interface of the signal output module of the test system that has been prepared above, and the measurement line from PORT2 is connected to the Interface connection of open tube coupler 16. After everything is connected, open the test software to start the test. Open "CTS Communication Cable Module Test System", after completing all the settings in the "Customized Test Task——Coupling Attenuation Test" dialog box, click "Test" to start the test. 17.After the test is completed, it could be seen the test curve which is smooth green curve is the test value curve 18.Complete the test after measuring four pairs of wires in sequence