What is wired broadband, maybe some users are not very familiar with it. Below, let's first briefly understand the difference between cable broadband and everyone familiar with ADSL.
Cable Broadband (Cable Modem) and ADSL are broadband technologies that provide Internet access. The main difference between the two technologies is the transmission medium and modulation method. Cable Modem is transmitted through a cable TV cable, and ADSL is transmitted through a telephone line. In terms of the theoretical value and expandability of the bandwidth, Cable technology is dozens of times higher than ADSL, so Cable Modem has excellent broadband advantages.
Many users are curious, why can cable broadband not only transmit TV signals, but also provide Internet services, why does the two not affect each other? Next, the author will reveal this mystery for you.
When users use Cable Modem to transmit data, they use a certain channel in the existing cable line. At present, coaxial cables are mostly used, and the entire cable can be divided into three broadband. Used for cable modem digital signal upload, digital signal download and TV program analog number download respectively. The bandwidth of the general coaxial cable is 5-750MHz, the digital signal upload is 5-42MHz, the analog signal download is 50-550MHz, and the digital signal download is 550-750MHz. In this way, digital data and analog data will not conflict with each other, and of course can be transmitted at the same time. This is why users can watch TV programs normally while surfing the Internet through cable broadband.
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