케이블링 산업 현황
4 쌍 PoE로 업그레이드: 알아두어야 할 사항
수년 동안 VoIP 전화나 보안 카메라 같은 다양한 장치를 위해 이더넷 전원 장치(PoE)를 지원하는 배선 시설을 구축해 왔습니다. So far, up to 30 Watts is all you’ve been requested to support, but with the plethora of devices now able to take advantage of higher levels of PoE—like the latest 802.11ac Wi-Fi access points, digital displays and even desktop computers—your customers are starting to ask for four-pair PoE.
2018년 5월 2일
제가 2-코드 테스트 방법을 사용할 수 없는 이유는 무엇입니까?
Like the TIA and ISO, Fluke Networks promotes the use of the 1-cord method to set reference for fiber loss measurements. The 1-cord method is where a launch cord is attached to a light source and the other end to a power meter. A reference is then set (the power measured is defined as 0 dB). Next, the launch cord is disconnected from the power meter, but not the light source. Then the far end of the launch cord is attached to the cabling under test and a receive cord between the far end of the cabling under test and the power meter.
2018년 4월 25일
케이블 테스트 101: 하지만 표준은 0.75dB입니다!
We’ve covered fiber insertion loss testing in depth in many blogs, so by now you should know that it is the loss of signal that happens in a channel due to the length of the cable and any connectors, splices or splitters.
And hopefully you also know that estimating your loss budget involves adding up the loss of all of these components to make sure you’re within the loss limits specified by IEEE standards for the application you plan to run.
2018년 4월 18일
모두 캘리브레이션해서 좋은 시간을 가집시다!
Just like those who drive around long after the engine service indicator lights up on the dashboard, there are folks out there who have likely been putting off getting their t
ester calibrated despite the email or LinkWare™ Live notification from Fluke Networks.
2018년 4월 4일
너무 빠른 작별 인사? 모두 상대적 ...
You might remember that just about three years ago, the DTX CableAnalyzer™ was officially retired. Since its discontinuation, Fluke Networks has continued to offer technical support, repair and calibration for this tester that was once touted as the ultimate time saver and brought testing to a whole new level when it was introduced in 2004.
2018년 3월 28일
101 시리즈: LEDs vs. VCSELs
Since today’s high-speed fiber networks use 850-nm vertical-cavity surface-emitting laser (VCSELs) transceivers, some may be confused about why light emitting diode (LED) light sources are used for testing. Understanding the differences between these two sources will certainly shed some light.
2018년 3월 21일
101 시리즈: 모달 대역폭이란 무엇입니까?
Often when we hear the term “bandwidth” we think of how much data can be sent over a fiber link. But when we look at fiber specifications, we typically see a specification for modal bandwidth, or effective modal bandwidth (EMB). This key characteristic of multimode fiber refers to how much data a specific fiber can transmit at a given wavelength, and it is dependent on another characteristic—differential mode delay.
2018년 3월 7일
OTDR: 궁극적인 문제 해결사
So you’ve finished your fiber cable installation and are now on to the task of certifying the cable plant using an optical loss test set (OLTS) – it’s the tool you need for Tier 1 certification and the
most accurate for measuring loss to ensure application support.
2018년 2월 28일
귀하의 광케이블 종단면은 만족스럽습니까?
While it seems we can never hammer home enough the need to properly clean and inspect fiber end-faces since contamination remains the number one cause of fiber link failures, have you ever thought about what exactly you are cleaning and inspecting?
2018년 2월 21일
BICSI 요약: 3가지 주요 질문
It’s always interesting at trade shows to learn what’s on the minds of end users, designers and technicians alike when it comes to testing. And this year’s BICSI Winter Conference was no different.
2018년 2월 14일
