समाक्षीय केबल उपेक्षित हुन छैन

 

 

 

CoaxialCसक्षम ("coax" for short) has long been used to transmit data and video signals. It is one of the first media to support 10BASE2 and 10BASE5 Ethernet, which can achieve 10 Mb/s up to 185 meters or 500 meters, respectively. s transmission. The term "coaxial" means that the central conductor of the cसक्षम and its shield have the same axis or center point. Some coaxial cसक्षमs may have multiple shielding layers, such as a four-shielded coaxial cसक्षम, which contains two layers of shielding, and each layer of shielding is composed of aluminum foil wrapped with wire mesh. The shielding characteristics of coaxial cसक्षम make it have strong anti-electromagnetic interference ability and can transmit high-frequency signals over long distances.

 

Although we usually think that coaxial cसक्षम is only used in broadband video and cसक्षम television (CAटिभी) home applications, in the business enterprise environment, from closed circuit television (CCटिभी), audio and video to RF antennas, and even some network connections, you can find Its figure. Therefore, it is very necessary to understand this cसक्षम medium and how to test it.

 

मुख्य प्रकार

 

There are many different types of coaxial cसक्षमs that support a wide range of professional applications, such as satellite communications, industrial, military, and marine applications. The three most common types of non-industrial Coaxial cसक्षमsछन्RG6, RG11रRG59, जसकोRG6सबै भन्दा सामान्य रूपमा प्रयोग गरीन्छCCटिभी Cसक्षमरCAटिभी Cसक्षम in corporate environments. The center conductor of RG11 is thicker than RG6, which means that its insertion loss is lower and the signal transmission distance is longer. However, thicker RG11 cसक्षमs are more costly and very difficult to bend, which makes them unsuitसक्षम for deployment in indoor applications, but more suitसक्षम for long-distance outdoor installations or straight backbone links. RG59 is more flexible than RG6, but its loss is higher. It is rarely used in other applications except for low-bandwidth, low-frequency analog video applications (rear-view cameras in automobiles) with short distances and limited wiring space.

 

 

केन्द्रीय कार्यालयमा प्रयोग हुने डिजिटल सिग्नल ((DS3) संकेत (जसलाई T3 लाईन पनि भनिन्छ) प्रसारण सेवाले पनि प्रयोग गर्दछCoaxial cसक्षमsincluding 75 सहितΩ 735 type and 734 type. The 735 type cसक्षम has a coverage distance of 69 meters, while the 734 type cसक्षम has a coverage distance of 137 meters. RG6 cसक्षम can also be used to transmit DS3 signals, but the coverage distance is shorter.