Electrical Equipment, Tools, Meters

Coaxial Cable

Coaxial Cable

Electric Equipment, Tools, Meters

RG58 Coaxial Cable BNC Crimp Crocodile Clip Test Lead    US $.99

Andrew FSJ4 50B Coaxial Heliax Cable 1 2 90 Feet    US $88.00

3 EZ FORM CABLE 7 MATCHED RF COAXIAL CABLES SMA EXC    US $2.85

NEW Belden 9203 coaxial cable RG 58U Coax 20 AWG 450    US $199.99

3 Micro Coax UFB197C Teflon Coaxial Cable 85 SMA    US $19.99

3 RF Coaxial Jumper Cable 5 N m Thermax MS2 320    US $30.00

COAXIAL CABLE STRIPPERS 5 EA NEW IDEAL 45 163    US $7.50

RG58 Coaxial Cable BNC Crimp Crocodile Clip Test Lead    US $4.99

Belden 9880 10 base 5 IEEE coaxial cable 200 ft yellow    US $40.00

RG58 Coaxial Cable BNC Crimp Crocodile Clip Test Lead    US $3.99

Coaxial Cable BNC Male to Crocodile Clip Test LeadsBLC    US $1.99

BNC Male to BNC Male Coaxial Jumper RG58 Test CableBBA    US $1.99

GARDNER BENDERGB COAXIAL CABLE STRIPPERSE 98RGBNEW    US $4.25

25 TYPE N COAXIAL JUMPER CABLES 12 INCHRF    US $27.50

Coaxial Cable Banana to Crocodile Clip Test LeadBC    US $1.99

CABLE GENERATOR PHONE TONE PROBE TRACER COAXIAL TRACKER    US $28.88

IBM Computer Cable LEONI Mini Coaxial 20 pr snake loom    US $9.99

Antenna ERRT RF Coaxial Cable Included    US $5.99

Coaxial Cable BNC M to Crocodile Clip Test LeadBLC    US $9.99

POCKET TONER CABLE TRACKER TOOL TESTER TV RG6 COAXIAL    US $11.90

100x BNC Male to BNC Male Coaxial Jumper RG58 CableBBA    US $225.00

6 BUNDLES BELDEN 9259 FLEXIBLE RG59 U COAXIAL CABLE    US $14.99

Pasternack RG393 U 7 Strand Coaxial Cable 50 Length    US $149.99

Pasternack RG393 U 7 Strand Coaxial Cable 20 Length    US $59.99

BNC Male to BNC Male Coaxial Jumper RG58 CableBBA    US $6.99

NEW BOX THOMAS BETTS COAXIAL CABLE SNS 11 FITTING    US $25.00

Thermax M17 60 RG 142 Coaxial Cable 50 RG142 Coax Wire    US $149.99

New Thermax M17 60 RG 142 Coaxial Cable 120 RG142 Coax    US $399.99

3 Dual Sets of 3 feet BNC Coaxial Cables 6X3 Bonus    US $.99

10Coaxial Cable Banana to Crocodile Clip Test LeadsBC    US $48.00

1000 ft RG59 Coaxial Siamese CCTV Cable Video Power    US $155.00

204 350 RG6 58 59 COAXIAL CABLE CUTTER STRIPPER CRIMPER    US $12.14

75 ohm Coaxial Cable Simulator Mountain Engineering    US $20.00

LK UNOPENED PACKAGE COAXIAL CABLE RG 59 FITTINGS    US $5.00

20 RG142 RG 142 Coaxial Cable Harbour Industries    US $26.90

RFS Ground Kit for 1 5 8 Coaxial Cable NEW    US $19.99

200 GARDNER BENDER MASONARY RG6 COAXIAL CABLE STAPLES    US $3.59

10pcs RG58 Coaxial Cable BNC Crocodile Clip Test Lead    US $58.99

300 GARDNER BENDER WOOD RG6 RG59 COAXIAL CABLE STAPLES    US $6.59

HP Agilent 8120 8862 Cable Assembly Coaxial Type N    US $80.00

HP Agilent 8182 0027 Cable Assembly Coaxial Type N    US $80.00

ECS 50 OHM COAXIAL CABLE TNC MALE 135 FT NEW SEALED    US $19.99

Gardner Bender 1 4 Wood Coaxial Cable Staples Black    US $6.95

4 HP AGILENT 8120 4782 RF Coaxial Cable S Parameter Set    US $300.00

200 GARDNER BENDER WOOD COAXIAL CABLE STAPLES NEW    US $3.59

1 pcs 6M Antenna RP SMA Coaxial Cable for WiFi Router B    US $7.99

HP Agilent 11605A Rigid Flexible Coaxial Cable Arm    US $195.00

Pasternack Coaxial SMA Cable Assembly Exc Cond    US $4.99

08 03376 13 N Male Male Coaxial Cable Pigtail RG 58    US $12.95

PCS D8D8 521 34 75 OHM Coaxial Cable    US $40.00

HP ET 51478 2 50 OHM Coaxial Cable    US $40.00

COLEMAN 991049 RG 58A U COAXIAL CABLE 1000 FT NEW    US $208.00

COLEMAN 991049 RG 58A U COAXIAL CABLE 500 FT NEW    US $108.00

COLEMAN 991049 RG 58A U COAXIAL CABLE 250 FT NEW    US $52.00

A transmission medium is required to carry information from a source to a destination. The information is usually a signal that has to travel a long distance. For this, the transmission media can be wired or wireless. In wired transmission, the signal travels along the cable from one device to another. But in wireless transmission the electromagnetic waves are transmitted without using a physical conductor. There are three types of cables such as.

1-    Twisted pair cable

2-    Coaxial cable

3-    Fiber optic cable

Twisted-Pair Cable

A twisted pair cable consists of two copper conductors, each one with its own plastic insulation and twisted together. One wire carries the signal and other is used as ground reference. The advantage of twisting is that both wires are equally affected by external influences. So the unwanted signals are canceled out as the receiver calculates the difference between signals in two wires.

This cable is of two types such as.
1- UTP (unshielded twisted pair)
2- STP (shielded twisted pair)

STP cable has one extra metal shield covering the insulated twisted pair conductors. But this is absent in UTP cables. The most common UTP connector is RJ45.

The unshielded twisted pair cable is classified into seven categories based on cable quality. Category 1 of cables is used in telephone lines with data rate around 0.1 Mbps. Whereas Category 5 used in LANs having 100 Mbps data rate.

Performance of twisted-pair cable is measured by comparing attenuation versus frequency. Attenuation increases with frequency above 100 kHz.
These cables are used in telephone lines to provide voice and data channels. DSL lines and Local area networks also use twisted pair cables.

Coaxial Cable
Coaxial cable (coax) carries high frequency signals than twisted-pair cables. Coax has a central core conductor of solid wire enclosed in an insulator, which is covered by an outer conductor of metal foil. This outer conductor completes the circuit. Outer conductor is also enclosed in an insulator, and the whole cable is protected by a plastic cover.

These cables are categorized by RG (radio government) ratings. RG-59 used for Cable TV, RG-58 for thin Ethernet and RG-11 for thick Ethernet. The connector used in these cables is called BNC connector; it is used to connect the end of the cable to a device. 
Though the coaxial cable has higher bandwidth, but its attenuation is much higher compare to twisted-pair cables. It is widely used in digital telephone networks where a single cable can carry data up to 600 Mbps. Cable TV networks use RG-59 coaxial cable. Traditional Ethernet LANs also use this cable.

Fiber-Optic Cable
A fiber optic cable transmits signals in the form of light. Optical fiber use reflection to guide light through a channel. It consists of two main parts: core and cladding. Core is denser compare to cladding and is made up of plastic or glass. Cladding acts as a protective cover to core. The difference in density of core and cladding is such that a beam of light moving through the core is reflected off the cladding, instead of being refracted into it.

Two modes of propagation of light are possible in optical fiber such as: multimode and single mode. Multimode fiber allows multiple beams from a light source move through the core. In multimode step-index fiber, the core density remains constant from the center to the edges. But in multimode graded-index fiber, core density gradually decreases from the center of the core to its edge. Graded-index fiber creates less distortion in the signal compare to step-index.

There are two types of connectors for fiber optic cables. The SC connector is used for cable TV, and ST connector used for connecting cable to networking devices. Attenuation in fiber optic cable is very low compare to other two types of cable. It provides very high bandwidth and immunity to electromagnetic interference. Light weight and greater immunity to tapping makes it more preferable cable.

Fiber optic cable is often used in backbone networks because of its wide bandwidth and cost effectiveness. Local area networks such as 100Base-FX network and 100Base-X use this cable. Also it is used by cable TV companies.

http://engineering360.blogspot.com/2009/10/types-of-data-transmission-cables.html

About the Author:

I am a freelance blogger. I publish articles on subjects like education,computers, technology, Internet, SEO, blogging and online jobs. you can visit my site at http://www.engineering360.blogspot.com/

Article Source: ArticlesBase.com - Types of Data Transmission Cables

City Telecom seeks TV licence
(Telecompaper) Hong Kong-based telecommunications services provider City Telecom is seeking a television licence. The company has submitted a licence application for a 'Domestic Free Television Programme Service' in Hong Kong. City Telecom plans to transmit television signals via the fibre network of wholly-owned subsidiary HKBN and interconnect to the existing common in-building coaxial cable ...