However, there are also other important criteria which allow to determine which type of an optical cable should be applied in a given case. The most important thing is to choose the right length of the cable for its future use. In the case of cables which use electrical signals as a data carrier, the longer the cable, the lower the data transmission quality. An optical cable always ensures the same signal quality, irrespective of cable length.
However, it is important to note that Toshiba the designer of the TOSLINK standard determined in its official specification that the cable length should not exceed 10m.
If this condition is fulfilled, connection quality depends only on the class and efficiency of devices which broadcast and receive the light signal. The optimal bandwidth is from approximately 9MHz to 11MHz. Manufacturers determine the price of the product based on a material used for its production. Materials which have better properties allow for higher transmission frequencies to be operated by the cable, whereas the use of plastic in the manufacturing of optical cable core will decrease the maximum transmission frequencies.
Such cables will be cheaper and, in theory, their quality will be lower, however they might prove to be a more economic and fully sufficient solution for certain applications for example when target device limitations nullify the importance of transmission frequencies.
It is crucial to take care of the proper plugging of an optical cable, so that it can function smoothly. Optical fibre technology is resistant to external factors, but very sensitive to the manner of use. The core placed in the optical cable is often made of glass or plastic, which is not as resistant to deformation as a coaxial cable. When installing audio equipment with the use of TOSLINK cables, cable deformation must be avoided, as it might cause core damage, which in turn makes the cable entirely useless.
The repair cost of a damaged optical fibre cable can be a dozen times more expensive than buying a new one. Therefore, this type of equipment should be handled with care. The process of connecting cable plugs with device plugs is not complicated. Every plug has hoods which protect connectors against the ingress of dust and dirt — before you begin to connect cables, you should remove them. It is good to remember that even the best audio data transfer will not make the sound quality better if the transmitting device for example a DVD player and receiver a home theatre with speakers are not sufficiently good.
Digital signal is a binary string in which a character string is encoded. Audio digital signal can be transmitted through coaxial or optical cables. The signal in an optical cable is in the form of light waves. In an audio-video player for example DVD , audio signal must be converted to light waves so that a signal which will be transmitted to a home theatre through an optical cable can appear on an optical connector.
After a cable is connected to an optical input of a home theatre, the light waves are converted to a digital form through the device — as a result, it will become an electrical impulse. The quality of the converter determines the quality of a transmitted signal in the same way as the quality of the material of the cable which transmits electrical signals.
Thanks to the application of an optical cable for a home theatre instead of HDMI or RCA , data transmission between the devices will be practically lossless. The price depends on the material, length and internal structure of a cable, as well as the type and quality of the connectors.
A good optical cable costs from several dozen to even several hundred PLN per metre. Before the purchase, it is worth learning more about the detailed specifications of devices which are to be connected and select a proper optical cable for their parameters.
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Saint Kitts and Nevis. Saint Martin. San Marino. Sao Tome and Principe. Saudi Arabia. Sierra Leone. A cable not of copper, but glass! Except, it was almost never glass, and was usually expensive. And while the optical cable was the digital audio transfer method of choice for decades, it has started to disappear. More and more products are dropping the optical connection. The official term for optical audio cable is " Toslink ," short for Toshiba Link. Though glass cables were available, for even more money, most optical cables were made from cheap plastic.
This limited their range to in-room use, primarily. But now more and more gear are dropping optical. The reason for this? Most soundbars still persist with an optical connection, and they are one of the only thing that keeps the format holding on. Of course, on the audio side devices like the Chromecast Audio also use an optical connection and this is as much due to space constraints as anything else. The Chromecast Audio uses the mini-Toslink variant which fits inside a 3.
So where'd it go? Doesn't optical have the potential for significantly more bandwidth than HDMI? Well… no. In theory, optical cables can transmit tremendous amounts of data. But the optical audio connection is far more limited.
Unlike HDMI, which has expanded its capabilities significantly over the short time it's been available , Toslink has remained largely the same. Because there is no specification for the optical connection to handle high-res audio, it can't do it. With no specification, one piece of gear can't talk to another piece of gear.
So yes, in theory optical can do a lot of things, but because everyone jumped onto HDMI, optical was left to languish. Perhaps ironically, many custom installers use optical to transmit HDMI data.
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