Page 128 - Electronic Mechanic - TP - Volume - 2

ELECTRONICS MECHANIC - CITS

EXERCISE 151: Test the healthiness cables and connectors

Objectives

At the end of this exercise you shall be able to
• to test of healthiness of cables and assemble them
• to test of healthiness connectors and assemble.

Requirements

Tools/Materials
• Multimeteter - 1 No. • BNC connectors - as reqd.
• Cable tester - 1 No. • Coaxial cable stripper - 1 No.
• Video balun - 1 No. • Coaxial cable cutter - 1 No.
• Power supply - 1 No. • Coaxial cable crimpers - 1 No.

Procedure

Theory
Before testing the CCTV cable, it is essential to know the different types of tests you can perform. Some of the
common tests include:
Continuity test: It determines the connection from end-to-end along the length of the cable.
Cable length test: It measures the distance between the two ends of the CCTV cable.
Signal test: It checks the signal quality between the CCTV camera and the recording device.

Voltage test: It checks if the CCTV cameras are receiving the right voltage to function correctly.
Continuity Test
To perform continuity testing, follow the steps below:
Place one end of the CCTV cable in the multimeter probe’s positive port and the other end in the negative port.
Turn on the multimeter and set it to continuity test mode.
If the multimeter beeps, it means the CCTV cable is okay, and if it doesn’t beep, it indicates that there is an issue
with the continuity of the cable.
Cable Length Test
Use a cable tester to measure the CCTV cable length accurately.

Ensure that the length of the cable is less than the recommended limit.
If the cable length is excessive, there may be issues with the signal transmission.
Signal Test
To perform the signal test, ensure you have a video balun, power supply, BNC connectors and crimpers, as well
as the CCTV cameras and the recording device. Follow the steps below:
Attach BNC connectors to both ends of the CCTV cable and crimp them using crimpers.
Attach video balun to one end of the CCTV cable and connect it to the CCTV camera.

Connect the other end of the CCTV cable to the recording device through the video balun and power supply.
Turn on the CCTV camera and verify if the recording device is receiving the footage.
If the recording device is receiving the footage, the signal test is successful.

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