Fluke: Residential Cable Testing System

One hundred years ago, you won't hear anyone laying telephone lines at home. Fifty years later, the telephone line was laid out very common, but it was never heard of anyone who installed the TV cable at home. Today, all residential buildings have installed telephone lines and cable TV cables in advance. What will happen in the future? The future trend is structured cabling for home computer networks. In the near future, all electronic devices in the home, such as computers, printers, scanners, and faxes, will be interconnected through a high-speed connector. Residential owners hope to provide cable outlets for computer networks, cable TVs, and common telephone lines. Some standards for residential Cable requirements already exist. We usually call it small Home Office SmallOffice Home Office) cabling. In the United States, TIA570A is applicable to residential and lighting cable standards.

The installation and debugging personnel who install new cables need to learn new technologies and information, because the installation of data cables is similar, and the installation of telephone cables is different in operation. In fact, the use of telephone cables is changing. Many new systems use four pairs of unshielded twisted pair wires that are the same as those of digital networks. The residential data communication cable is a typical 4-to 100 Ω cat5e or cat5e twisted pair cable. It can be connected to the indoor wall outlet from the disconnects mounted from the network interface device outside the data access point. The owner may choose to connect with a hub or directly connect to an Internet access device, which increases the complexity of the residential network.

When wiring a house, you must be careful to keep the twisted distance of the twisted pair wire and fix it on the data connector to minimize the crosstalk of the cable. To avoid cable deformation, do not drag the cable over the corner, which will lead to excessive signal attenuation. If possible, the cable should stay away from the AC power cord to avoid noise interference.

Authentication and verification

In commercial cabling, it is necessary to test structured cabling and establish certification standards. Commercial systems have higher requirements for cable installation and have a large number of standards for installation and testing. The authenticated network is the standard network.

What does this sentence mean?

Certification means to make a measurement and compare it with existing standards to determine whether it is qualified. For example, using a DSP series such as Fluke network or OMNI series instrument to measure the bandwidth of MHz of cat5e twisted pair wires before obtaining results, and compare it with the previously created complex formula.

In contrast, most residential cable systems require verification tests. Verify or test the basic continuity and correct terminal, instead of measuring the information capacity that the link can carry. The reason is simple, because the home network link is often shorter than the commercial line. It is precisely because of the short, so they have almost no signal attenuation. The signal is obviously strong, so the damage caused by near-end crosstalk, remote crosstalk, or ripple loss is much less.

Line Sequence

For verification of residential cables, the most important measurement or diagnosis is the line sequence, which determines the correct connection between the points at both ends of the link ). At home, cables may be broken or short-circuited by nails or stapler nails, which may be improperly terminated or cross-connected, and may be damaged by other construction projects. A good line sequencer can quickly find problems such as short circuits, open circuits, and cross connections. The correct cables and common errors are listed in. The result of a typical field tester is displayed.

Diagnosis

What will happen when an error is found?

First, to quickly fix it, you want to confirm the problem, which means that the diagnostic function of the cable tester is helpful. For example, the wire sequencer tells you that the second wire is open or has an incorrect connection. So where is the disconnection? Is it at the local connection? Or outside 10 feet? Not 30 feet? Not 50 feet? Or at the other end of the connection line? It takes a long time to locate a fault with your eyes. What if a large number of cables are hidden in the wall? This is why the TDRTime Domain Reflect function of time Domain reflection is used. This is a very convenient function of the field measuring instrument. A tdr is like a cable radar that determines where an open or short circuit is located. In the previous example, the TDR function tells you that the second wire is broken at 35 feet points, maybe 58 feet long. So what is the situation at the far end of the cable? Is it open? Is it short circuit? Is it connected to a hub? When a problem occurs, the measuring instrument's detection capability on the other end can also save time. The cable length indicated by the wire Measuring Instrument Display and persistent connection to the far end are displayed, connected to an unactivated hub. If the hub is activated, the connection speed is 10/100.

Unshielded twisted pair wires and copper axis Cables

In residential applications, it is useful to support measurement of the length of twisted pair wires and coaxial cables. Using a signal tester, you can eliminate problems with telephone, data cable, and cable TV. The length value can be used in cable installation documentation and expense files.

Another popular debugging tool is the audio detector. This tool is often used in pairs. The sound meter generates a specific signal on the connection cable, and when the detector has a plug tip close to the cable to "listen", it will hear a certain tone. The closer it is to the cable, the larger the sound is to be detected. This technique is required when you want to use a set of wires to center a wire or a cable hidden in a wall. In order to get the other end, you can match the audio generator and generate a signal. Then you scan the detector to the end area of the tested cable to listen for different tones.

Home Network installation is increasing in the speed of communication, which will be very common within five to ten years. This means there is a lot of profit for residential cabling services. In short, the data cable is not the one that requires no management after installation. Simply testing and verifying the correctness and professionalism of the installed cables will increase your user satisfaction and expand your business.

: The installer uses the tester to test the wiring of the residential network.

: Common wiring errors

: Line sequence Display of field Tester

: Field tester validation length and end equipment

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Webpage: www.flukenetworks.com.cn