Testing, structured cabling, certification, test results, Nottingham, leicester, Derby,

Testing


A Fluke Certified Test technician is responsible for all data cable testing. Because of today’s fast transmission speeds it is critical that all components are thoroughly tested. Every cable and connector that we install is tested using a Fluke DTX tester and a report is provided verifying compliance to the Category 5 and Category 6 standards. We also offer a test only service for customers who install their own data cables but want test certification.

A Fluke Certified Test technician is responsible for all data cable testing. Because of today’s fast transmission speeds it is critical that all components are thoroughly tested.

Every cable and connector that we install is tested using a Fluke DTX tester and a report is provided verifying compliance to the Category 5 and Category 6 standards. We also offer a test only service for customers who install their own data cables but want test certification.


Wire Map The wire map test ensures that the pins are connected properly and in the correct sequence. The wire map also checks for shorts, continuity, crossed pairs, reversed pairs and split pairs. Length The length of a cable is one of the more obvious causes of attenuation because the longer it is, the more resistance it has, and therefore less of the signal will get through. The tester limit is set to 90m allowing for 10m of patch leads at the user outlet and patching cabinet.

Wire Map

The wire map test ensures that the pins are connected properly and in the correct sequence.

The wire map also checks for shorts, continuity, crossed pairs, reversed pairs and split pairs.

Length

The length of a cable is one of the more obvious causes of attenuation because the longer it is, the more resistance it has, and therefore less of the signal will get through. The tester limit is set to 90m allowing for 10m of patch leads at the user outlet and patching cabinet.


Attenuation Attenuation is the decrease in signal strength along the cable, too much attenuation can cause the signal to be lost or distorted. Cable length is the major factor for attenuation measurement. The Fluke tester sends a calibrated signal to the remote end and measures the loss in decibels (db).

Attenuation
Attenuation is the decrease in signal strength along the cable, too much attenuation can cause the signal to be lost or distorted. Cable length is the major factor for attenuation measurement.

The Fluke tester sends a calibrated signal to the remote end and measures the loss in decibels (db).


Cross talk NEXT / FEXT Cross talk refers to the interference from wire to wire. for example you may remember hearing a faint telephone conversation whilst you are using your own landline. When a signal travels down a conductor, an electric field is created, which interferes with any wires close by. The electric field is increased with higher frequency and data speed. The Cross talk ratio is higher along parallel cables, the twist ratio in data cables are therefore important for cancelling out the interference from other pairs within the cable. It is also crucial to maintain a minimum untwist whilst making the connections at the patch panels or jacks. Near end cross talk (NEXT) is the measurement of interference between pairs up to 30 metres from the signal source. Far end cross talk (FEXT) is the measurement at the receiving end. The cross talk across the cable length is measured by subtracting the Attenuation value from the FEXT value this measurement is referred to as ELFEXT.

Cross talk NEXT / FEXT

Cross talk refers to the interference from wire to wire. for example you may remember hearing a faint telephone conversation whilst you are using your own landline.

When a signal travels down a conductor, an electric field is created, which interferes with any wires close by. The electric field is increased with higher frequency and data speed.

The Cross talk ratio is higher along parallel cables, the twist ratio in data cables are therefore important for cancelling out the interference from other pairs within the cable. It is also crucial to maintain a minimum untwist whilst making the connections at the patch panels or jacks.

Near end cross talk (NEXT) is the measurement of interference between pairs up to 30 metres from the signal source. Far end cross talk (FEXT) is the measurement at the receiving end.

The cross talk across the cable length is measured by subtracting the Attenuation value from the FEXT value this measurement is referred to as ELFEXT.


Delay Skew To minimise cross talk the pairs within a cable are twisted differently and therefore the length of theconductors are not the same. Because of the difference in length the signal sent across each pair will arrive at the receiving end at a different time, Delay Skew is the difference between the fastest and slowest pairs.Skew should be as low as possible and must be within 50 nanoseconds for Cat5e and Cat6 cables. Noise The electrical interference on the wire not part of the sender’s original signal is classed as noise.Interference can come from many sources (mains cables, fluorescent lights and air conditioners)

Delay Skew

To minimise cross talk the pairs within a cable are twisted differently and therefore the length of theconductors are not the same. Because of the difference in length the signal sent across each pair will arrive at the receiving end at a different time, Delay Skew is the difference between the fastest and slowest pairs.Skew should be as low as possible and must be within 50 nanoseconds for Cat5e and Cat6 cables.

Noise

The electrical interference on the wire not part of the sender’s original signal is classed as noise.Interference can come from many sources (mains cables, fluorescent lights and air conditioners)


Return Loss Return loss refers to the Impedance it is a measure of reflections due to variations in the cable construction and the terminations at the patch panel and jack. The cumulative amount is known as the Return Loss. Too much return loss causes transmission errors.

Return Loss

Return loss refers to the Impedance it is a measure of reflections due to variations in the cable construction and the terminations at the patch panel and jack. The cumulative amount is known as the Return Loss. Too much return loss causes transmission errors.


We do provide a test only service but would advise that the following have been adhered to. Enough spare cable should reconnections be necessary Maintain the minimum twist up to the point of termination. Cut the cable sheath off at least as possible as this will maintain the twists. Use an understandable labelling system.

We do provide a test only service but would advise that the following have been adhered to.

Enough spare cable should reconnections be necessary
Maintain the minimum twist up to the point of termination.
Cut the cable sheath off at least as possible as this will maintain the twists.
Use an understandable labelling system.


FREEPHONE 0800 9550944

FREEPHONE 0800 9550944