Cable Testing Tools – Locate faulty N-connectors and/or faulty cables

toneG and toneR_1300


The Problem:

During the installation of a repeater system in a building, it is very easy to insert a N-connector badly onto one , or many of your coaxial cables. Putting N-connectors onto coaxial cable requires skill and it is easy to get it wrong.

A faulty N-Connector can attenuate the signal by 20dB!

If the centre pin of the connector is too far inside the housing, then it will not form a contact with the centre core of the cable and will attenuate the signal badly.

too far inside

A faulty cable can occur if the cable gets kinked or crushed in any way. Again, this fault will manifest itself in attenuated signal (sometimes only in certain bands).

Your installations may have faulty connectors/cables and you may not know about it. Your client may have a repeater system that is not performing at its best.

The correct solution to avoid this situation is to test your cables.

The tone generator and tone receiver tools, TONE-R and TONE-G

The tone generator is a small box that generators a tone exactly at 950MHz. It is battery powered. You connect it to one end of the cable you wish to test, and switch it on.

It will send a 950MHz tone down the cable.

Then, attach the tone receiver at the other end of this cable. Switch it on and read the LCD display.

On the LCD, enter the type of cable(SD240, SD400 or SD600),  (SD400 is the default)

It will inform you the length of the cable and the dB loss over the cable. You can then decide if this is correct or not.

If you know the length of cable is around 20 meters, and the tool tells you it is 100 meters, you know there is an issue.

Every cable should be tested. This way you can be confident that there are no faults with any of your cables in the building.