Knowledge

From the three elements of fiber coil diameter and bottom line, coil direction fixation sequence to pallet label, the verifiable practices of fiber coiling in ODF and splice boxes are sorted out to help post-delivery maintenance quickly find the corresponding fiber core.

Select cleaning tools according to the diameter of the ferrule, master the wiping sequence of first dry and then wet and the habit of preventing secondary contamination. Explain the often-ignored link of cleaning the inner hole of the adapter to reduce hidden link failures.

The calculation method of inverting the attenuation value from the target light receiving power and the access locations of the three structures of line jump type, flange type and modular type are given, and tolerance and wavelength flatness are reminded of two easily overlooked details.

This article explains the concept of optical module overload point and typical scenarios of excessive light collection, and provides a three-step process for dealing with light collection overload using an optical power meter for actual measurement, selecting attenuation values, and retesting to avoid wasting budget by continuing to replace modules due to misjudgment.

Explains the mechanism of high jump of insertion loss and deterioration of return loss after mixed insertion of UPC and APC end faces, and provides methods to identify end faces by color and three on-site habits to avoid mixed insertion, which is suitable for comparison and inspection during modification and acceptance.

Insertion loss determines how much light is lost from the link, and return loss determines how much light is reflected back. This article breaks down the qualifying intervals for the two indicators of the adapter, common causes of degradation, and the accounting method for each connection point when converted to the link budget.

From OM1 to OM5, the core diameter, effective mode bandwidth and operating rate of multimode optical fiber are significantly different. This article gives a comparison of typical transmission distances of each level and explains why it is recommended to start with OM3 or OM4 for 10 Gigabit and above.

Reverse connection of the two-core jumper will cause the transceiver to be reversed and the link to be directly blocked. This article explains clearly the difference between A-B and polarity reversal, the applicable scenarios of the three polarity methods of TIA-568, and how to quickly determine the polarity on site.

The measured distribution of jumpers with the same nominal 0.3dB is very different. This article disassembles the insertion loss from ferrule aperture centering, end face grinding and adapter matching, and explains how to use measured data to screen out batches with poor consistency.

Many purchases confuse jumpers, pigtails, and flange adapters. This article clarifies the differences between the three from the structure, termination method, and purpose, and explains which link scenarios single-core and dual-core jumpers are suitable for.