The Verge Chinese Station reported on November 24 To some extent, Apple is the best technology company because it has the ability to "educate users" (the other company may be Dafa). For example, Apple likes to change the popular standard, first cancel the DVD drive, their own 30-pin or Lightning interface, and fans basically do not have much complaints, and readily accepted. However, Apple seems to have overdone it recently. From the 12-inch MacBook only one USB-C, followed by the iPhone 7 series without the 3.5mm headphone jack, then the new MacBook Pro with only 2 Thunderbolt 3/USB-C (13-inch high version and 15 inches 4) Even my own iPhone cannot be charged directly. In fact, the actual use is even more terrible. The two sisters of The Verge performed the experiment under the same scene, and the process has been painful, not to mention the real experience, and you feel it. Scenario 1: Sisters use laptops to charge their mobile phones. The left eyeglasses sister (Sister A) uses the older MacBook Pro and iPhone 6s, the right sexy sister (Sister B) uses the new MacBook Pro and iPhone 7, this scene sister B is still very calm: you see a USB-C to Lightning switch Get it! Scenario 2: Sisters will use the iPhone to charge songs on their laptops. The sister A will use 6s and the old MacBook Pro. Nothing will matter. Just find a 3.5mm headphone plug and start listening; sister B needs to change one at the same time. Adapter with Lightning and 3.5mm interface, so re-plug. It's okay. Scenario 3: Sisters use the card reader to edit the photos. The sister A is still plugged in directly. The sister B is a bit frantic, but still hard: Change the USB-C card reader just fine! Sister A smiles calmly and has finished 5 photos... Scenario 4: Suddenly, the iPhone 7 is still connected to a 3.5mm adapter and the headset is plugged in first. Now, just not rushing for a while, it will be unplugged. You have to plug in the computer again, Nani! There is no place to plug in... Nothing, not an important call, I do not answer. Sister A is still smiling and talking on the phone... Honestly, do you see that the egg hurts? Finally put a picture, if you use the new MacBook Pro, iPhone 7 series, there is a digital camera waiting to import photos, this may be all the adapter you need. Oh yeah, sister B used a low profile, only two Thunderbolt 3/USB-C, so she couldn't plug it all in. Perhaps one day, USB-C will completely replace the USB-A, micro USB, Lightning, etc. interface, but now, I just want to use a data cable to properly charge the phone. (Author: Lauren Goode compilation: Leon) Click to view original link ã€The relevant rights in the Chinese language of The Verge's works in the United States are owned by Tencent Corporation. Without authorization, they may not be reproduced or excerpted. 】 Fiber optic adapters are typically used to connect two fiber optic cables together. They come in versions to connect single fibers together (simplex), two fibers together (duplex), or sometimes four fibers together (quad). Adapters are designed for multimode or single-mode cables. The single-mode adapters provide more precise alignment of the tips of the connectors and can be used to connect multimode cables. The reverse is not suggested as this might cause misalignment of the small single-mode fibers and loss of signal strength (attenuation).
Optical attenuators can take a number of different forms and are typically classified as fixed or variable attenuators. What's more, they can be classified as LC, SC, ST, FC, MU, etc. according to the different types of connectors.
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Optical attenuators are commonly used in fiber-optic communications, either to test power level margins by temporarily adding a calibrated amount of signal loss, or installed permanently to properly match transmitter and receiver levels. Sharp bends stress optic fibers and can cause losses. If a received signal is too strong a temporary fix is to wrap the cable around a pencil until the desired level of attenuation is achieved. However, such arrangements are unreliable, since the stressed fiber tends to break over time.
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