1, the classification and main functions of the home audio: home audio is usually divided into pure audio and home theater audio two categories. Pure audio is also called HI-FI audio, which consists of pure power amplifier (only two channels output), speakers and disc players, generally used to listen to music and songs. Home theater audio is also called AV stereo, which can play music and songs in two channels, and can also play six-channel home theater discs. "Hot enthusiasts" generally play pure audio, and mainly listen to Western classical music.
2, the relationship between fiber optic cable, coaxial cable and decoder and power amplifier: the disc player itself can "read code" and "decode", but in order to reduce costs, its decoding function is generally very basic. In order to improve the "decoding" level and make the sound more awkward, people have invented an independent decoder and a power amplifier with decoding function, so there is a connection between the disc player and the decoder, between the disc player and the decoding amplifier. The "bridge" - fiber optic cable and coaxial cable, they transmit the digital audio signal "read" from the disc player to an independent decoder or a power amplifier with decoding function to "decode" into an audio signal. This type of transmission is often used in mid- to high-end audio.
3, audio cable, video cable, coaxial cable can not be mixed: from the appearance, the video cable, audio cable and coaxial cable are composed of the wire body and the two ends of the terminal, and all rely on the inner metal wire core to transmit signals . Therefore, some people mix and match the three for greedy convenience or low requirements. This also turns on the signal, but the sound quality and picture quality are definitely impaired. The Yinyewang AV line adopts different structures and materials according to the characteristics and uses of the three in production, ensuring the true restoration of music and images.
4. Compare the conditions of the two AV cables with the same function:
1 The price and grade of both must be close;
2 must use the same set of sound, the same piece of music, the same volume, the same listening environment;
The sound and audition discs used in the 3 must be medium to high-end, and the low-end files themselves will emit noise, which is difficult to compare.
How to choose a reasonable AV cable for the sound?
The AV line acts as a "bridge" for transmitting signals in the sound. According to the grade of the audio, the AV cable of the same grade is selected, so that the sound effect of the sound can be better played. Generally speaking, in the mid-to-high-end audio combination, the AV line accounts for 20% of the investment ratio is reasonable. Even for general audio, we can't use too low-end AV cable, because it will not only attenuate the signal, but also the transmitted signal is susceptible to external electromagnetic interference, which eventually leads to distortion of the sound. The practice of spending money on buying audio and not being willing to pay for AV cable is actually no different from driving a Mercedes-Benz to a petrol station and adding 90# gasoline. On the surface, it saves money, but it eventually leads to bad results.
AV cable should be paid attention to during use
1: Lines with different functions cannot be mixed at will, for example, audio lines cannot be used to replace coaxial lines;
2: The AV cable should not be bent as much as possible, and it is better to stay away from the power supply;
3: The AV cable should be as short as possible on the premise that it is sufficient, and the extra length will only increase the signal loss;
4: The size of the speaker cable should be selected according to the size of the audio power. Too small, the signal transmission is stagnation, the speaker can't make a good sound; too much, the signal loss increases, the burden of the power amplifier increases, and the speaker can't make a good sound.
5: The AV cable must be fastened to the outside. If the contact is bad (such as collapse, etc.), it will cause the sound of the sound, and serious components will burn out.
6: After the AV cable is used for a certain period of time, the metal terminals and the metal core may be oxidized (ie, “agedâ€), which will affect the sound effect and should be replaced according to the actual situation. The Silver Leaf King AV cable uses 24K gold-plated terminals to effectively eliminate and alleviate the "aging".
Incremental Encoder is commonly used, and Absolute Encoder is used if there are strict requirements on position and zero position. Servo system should be analyzed in detail, depending on the application situation. Commonly used incremental encoder for speed measurement, which can be used for infinite accumulation measurement; Absolute encoder is used for position measurement, and the position is unique (single or multiple turns). Finally, it depends on the application situation and the purpose and requirements to be realized.
Incremental Linear Encoders,Linear Optical Encoder,Linear Position Encoder,Encoder Bearing Tester
Yuheng Optics Co., Ltd.(Changchun) , https://www.yhencoder.com