What are the three phases of testing?
Phase 1- inspection and visual verification
Phase two- testing using the various equipment needed for the cable
Phase 3- documentation
What needs to be inspected during the first phase of testing
Cable infrastructure( the placement and termination)
Earthing
Eqiupment and patch cords
Proper labeling of all components
Safety
Compliance with code
What are all test results provided in?
The format identified in the SoW; where no result format exists, a format should be offered by the ICT systems installer for customer approval
What phase is the most neglected?
Phase 3- documentation
What does VIRT stand for?
Verifying the problem
Isolating the source of the problem
Repairing the problem
Testing the repaired system to make sure it works properly
What can a multi meter be used to measure
Ac/dc voltage, current and resistance
What does a toner do?
It provides the ability to identify a specific cable by generating a tone on one end and using a wand on the other to find the cable
What do wire map testers usually test for?
They test for opens, shorts, crossed pairs, and miswires in in either a 4 or 25 pair cables
What is a cable end locator kit?
A kit of mod plugs that can be identified by the test equipment
What does a qualification test set test for?
Cable speeds
What specifications are field testers supposed to meet
The respective accuracy specifications for NEXT and insertion loss measurements up to the specific cable bandwidth of the specific category and class type
Name the TIA category, ISO/IEC class and the bandwidth range for tester level 2g
Tia category- 8
IEC/ISO class- 1
Bandwidth range- 1600-2000 MHz
Name some important things the field tester should be able to measure
-wire map
-insertion loss
- length
-NEXT loss measured from local end and from far end
- PSNEXT loss measured from far end and local end
- ACR-F
- PSACR-F
-return loss from local and far end
- propagation delay
- delay skew
What can the time domain reflectometer ( TDR) identify and locate
Cable defects, splices, connectors, and the location at which impedance changes occur along the link under test
What does the TDR also display( this is the one highlighted under the other examples in the book)
Impedance changes caused by kinks or splices and the impedance change from the opening at the end of the cable
What does the telephone test set( butt set) do?
Stimulate the users analog telephone equipment
Identify analog circuits
Diagnose and trouble shoot analog circuits
To ensure proper field testing set up what must be done?
You should confirm the test set is within cable calibration
What is a good rule of thumb to keep your tester calibrated?
To perform the field calibration at least once a day or before beginning a new series of tests
What is a simple way to verify your tester is providing reliable results
Constructing a sample length of a predetermined cable using length markings on the cable as an exact reference
What are the possible results from a tester
PASS, *PASS, FAIL, and *FAIL
when the test result of a parameter is closer to the test limit than the measurement accuracy it’s marked with an Asterisk
Do connectors have a limit on the amount of reliable connect and disconnect cycles it can have
Yes
What is very IMPORTANT to do to make sure your tester works properly
Upgrade to the latest firmware and maintain the current documentation of the test sets to ensure operational procedures are up to date
What levels are adapters available in?
Level 2e, level 3, level 3e, and level 4 test sets and TDRs that will allow for both continuity testing and length measurements of coax cable
What does trouble shooting a customers problem in a copper cabling system involve
-verifying the problem
-isolating the source of the problem
- repairing the problem
- testing the repaired system to make sure it works
And documenting findings for each step and taking corrective actions
