Industries We Serve
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Data and Network
When it comes to data network products, there are different types of
testers for different types of technologies, and different tests that
can troubleshoot different issues. Quality Defender offers you inspection
solutions on RJ45 Ethernet cables, patch panels, server cabinets which
deliver you peace of mind if you are unsure what quality status of the
products that are to be shipped to your warehouses.
We offer you on-site inspections with below tests provided your supplier has the adequate and well calibrated testers available for testing the key quality points:
Pinout/Continuity: Testing for continuity or resistance continuity refers to the continuous path for current flow in a closed circuit. A continuity tester will also allow you to test if electrical currents can flow between two points.
Resistance Tester: This is the measurement of a conductor's opposition to an electron current, which is measured in ohms. When there is resistance present, the current capacity will decrease as the length of a wire increases. This means that the longer the cable, the less current capacity it has. Most professional testers have the ability to measure ohms and can read resistance.
Insertion Loss: This is otherwise known as power loss in a return signal when a device is inserted down an optical fiber line. When a transmitted signal is reflected by link components, this causes insertion loss.
NEXT: This acronym stands for "near-end crosstalk", which is a failure or interference between two wires inside a cable. This can occur when the wires in a twisted pair cable get crossed. Disturbance is the measurement of interference caused by one twisted pair when wired pairs get crossed. Testing for NEXT can be tricky when some pairs inside the cable pass, and others fail, causing you to have to test each wire individually.
PS NEXT: "Power-sum near-end crosstalk is a measurement and extension of NEXT as it applies at the ends of four-wire twisted pair cable.
ACR-F: "Attenuation to crosstalk ratio - far end" Ensures a twisted pair cable receives a signal at the receiving end of the cable, to make sure there is no other interference from other cable pairs. ACR-F is measured by network testers in decibels. A network tester can calculate the signal power transmitted into one end of a link of a twisted pair.
PS ACR-F: "Power Sum Attenuation-to-Crosstalk-Far End": The difference between PSNEXT and attenuation on the farthest end of the cable. PS ACR-F calculates the power sum of an individual pair ACR-F.
ACR-N: "Attenuation to Crosstalk Ratio -Near End": This is the measurement which will tell when signal transmissions are stronger than the interference that is caused by crosstalk at the end of the cable.
PS ACR-N: This stands for Power Sum Attenuation-to Crosstalk-Near End and describes the power sum that is the accumulation of attenuation within four wires.
Return Loss: This occurs when a cable gets small internal signal clogs caused by reflections that are sent back to the transmitter while en route to the receiver. Return loss normally occurs in cables that have subpar terminations due to shoddy crimping. On top of causing a poor signal transmission, if the amount of return loss in a cable is too high, this can cause the cable to receive a failing grade when tested. Return loss tests are measured in decibels. The equation for return loss for Cat 5e cable channel is: RL = 10 log10(Pout/Pin) The frequency (in MHz) 1< f <20 equals category 5e (dB) 17. 20
When you receive interference and an unwanted signal within your cable, you have what is referred to as crosstalk. These ailments go hand-in-hand with what is known as packet loss, which can mutilate data and break up signal strength. These two issues can wreak havoc with your network, but luckily can be tested with a network tester that has test management software installed.
Continuity and Current Testers
If you need to test voltage, current or continuity, you can do so with an electrical tester. This type of tester allows you to test cables using volts, current, or ohms while checking for circuit shorts within the cable. Testers can automatically measure AC/DC volts and current digitally, often within a matter of seconds.
Tone Generator Testers
Tone generators usually come with an amplifier probe and can test the continuity of a cable using audio by sending a tone down a group of wires while the amplifier receives that tone and singles out faulty wires within twisted pairs. Tone generators can check for active ports, check for issues on the far ends of cables and can even reallocate unused ports.