Page 131 - Electronic Mechanic - TP - Volume - 2

ELECTRONICS MECHANIC - CITS

This tracing and beeping will work even if the other end of the coaxial cable is attached to a wall outlet.
Test coax cable with a multimeter
The best way to check for continuity when testing coaxial cables is by using a digital multimeter. Testing for
continuity on coaxial cables can be done in the following steps:

Test your coaxial cable for proper connection by disconnecting it from all attachments. This includes disconnecting
the cord from the TV, camera, or other cables near where the cord is plugged in.

When you attach the tip of your coaxial cable to an external source, touch one probe of the multimeter to where
it meets a metallic part. Touch the other probe of the multimeter to where it meets the center wire or core. You’re
looking for a readout close to zero ohms/

Get a reading greater than zero? Then, your coax cable needs to be fixed - or replaced. This reading is telling you
that something has interrupted the signal from ever making it there in time..
You could measure how much resistance the circuit has with an ohmmeter.

Connect the ohmmeter to the cable. If it’s working, there should be a low-to-moderate resistance reading of
75-100ohms.
If the reading is outside of this range, it may be time to replace your cables.

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CITS : E & H - Electronics Mechanic - Exercise 151