Page 67 - Access Catalog 10

REFERENCE
605 Plug / 610 Socket Colour Sequence
Coaxial Cable
Coaxial cable (or “coax) is the most common cable used for transmitting video signals. The name “coaxial” refers to the common axis of the two conductors.
Construction
A coaxial cable has a solid copper or copper-clad-steel centre conductor surrounded by a non-conductive dielectric insulating material. The dielectric is surrounded by foil shield/s and/or copper braid/s which form the outer conductor and also shield against electromagnetic interference (EMI). The outer conductor/shield is encased in a PVC jacket.
Most coaxial cables for video applications have a nominal impedance of 75 ohms. Their differing electrical and physical characteristics make it important to select the correct type of cable to suit the application.
Types of coaxial cables
The three most commonly used coaxial cable types for video applications are RG59/U, RG6/U and RG11/U. The “RG” number originated from the “registration number” allocated by the US military to each type of cable. The “/U” indicates that the dielectric is unbonded to the centre conductor.
RG59/U is available with either solid copper or copper- clad-steel centre conductor. It’s suitable for basic analogue TV antenna feeds in residential applications and for basic CCTV systems over short cable runs. The copper-clad-steel type has high tensile strength and should be used when terminating the cable with F-Type connectors.
RG6/U Dual-shield Used for security systems, for analogue TV antenna cabling and for CCTV. It features a copper-clad-steel inner conductor. Tri-shield and quad-shield versions of RG6/U provide additional EMI shielding for digital applications.
RG6/U Quad-shield is the minimum requirement under the latest Australian Standard for digital TV antenna cabling and for all TV antenna cabling for apartments/units (MATV). It is also used for the distribution of Cable TV (CATV) and Satellite TV (SATV) in residential or commercial premises. It features a copper-clad-steel inner conductor. Dual-shield and tri-shield versions of RG6/U do not provide adequate EMI shielding for these applications.
RG11/U Quad-shield is used for the same applications as RG6/U for either backbone cabling or for long distribution runs. It features a copper-clad-steel inner conductor.
Coaxial Connectors
BNC connectors are bayonet type connectors, commonly used in CCTV systems. They are the most suitable connector for use with RG59/U cable.
F-Type connectors are used for CATV, SATV and Digital TV in conjunction with either RG6/U or RG11/U cables. The copper-clad-steel inner conductor of the cable forms the inner “pin” of the connector. Although “twist-on” type connectors are available, they do not produce a reliable connection in comparison to a crimp-type connector that has been terminated with a good-quality ratchet crimping tool.
PAL (Belling Lee) connectors are a push-on connector that has been traditionally used for TV antenna wall plates and connections. With the exception of TV/VCR hook-ups, PAL connectors are being replaced by F-Type connectors as required for CATV, SATV and DTV.
Adaptors. Where BNC connectors are required with RG6/U coaxial cable, it is recommended that an F-Type plug be crimped to the RG6/U and an F-Type to BNC adaptor used.
Optical Fibre Cable Categories
ISO/IEC 11801
MODE
CORE/CLADDING
DEFAULT JACKET COLOUR
NOTES
ETHERNET
OM1 MULTIMODE OM3 MULTIMODE OS1 SINGLEMODE
Multimode
62.5/125 μm 50/125 μm 9/125 μm
ORANGE AQUA YELLOW
LED
LASER OPTIMISED
1 Gigabit Ethernet
10 Gigabit Ethernet 300M
OM2
MULTIMODE
50/125 μm
ORANGE
LED
1 Gigabit Ethernet
OM4
MULTIMODE
50/125 μm
0 Gigabit Ethernet 550M
OS2
SINGLEMODE
Multimode fibre optic cable can be used for most general fibre applications. Use multimode fibre for bringing fibre to the desktop, adding segments to an existing network or in smaller applications such as alarm systems.
62.5-micron cable (Orange OM1) vs 50-micron (Aqua OM3 10-Gigabit)
Multimode cable comes with two different core sizes, 50 micron or 62.5 micron. Although 50-micron fibre features a smaller core, which is the light-carrying portion of the fibre, both 62.5-micron and 50-micron cables feature the same glass cladding diameter of 125 microns and both types can be deployed within the same network. However, 50-micron cable is recommended for premises backbone, horizontal and intra-building connections and should be considered for new construction and installations. Both types can use either LED or laser light sources. The main difference between 50-micron and 62.5-micron cable is in the bandwidth. 50-micron cable allows three times the bandwidth of 62.5-micron cable. Other differences are distance and speed. 50-micron cable provides longer link lengths and/or higher speeds.
Singlemode
9/125-micron (Yellow OS1)
Singlemode fibre optic cable features a 9-micron glass core which allows only one pathway of light. Singlemode works with only a single wavelength of light passing through its core by realigning the light towards the centre of the core instead of simply bouncing it off the edge of the core as with Multimode.
Singlemode is typically used for long-haul network connections exceeding a few kilometres. For example, carriers use it for connections between exchanges.
Duplex
Duplex cable consists of two fibres, usually in a figure-8 (siamese) configuration and is available in either Multimode or Singlemode fibre types. Duplex is used for applications that require simultaneous, bi-directional data. Typical applications include fibre switches, patch panels and servers.
Simplex
Simplex fibre optic cable consists of a single fibre and is available in either Singlemode and Multimode types. It is used for applications that only require one-way data transfer.
Connector Types
The most commonly used connectors are SC and LC.
SC Square Connector MT-RJ Duplex form factor FC Ferrule Connector
TYPE
DESCRIPTION
ST
Straight Tip (Bayonet)
LC
Lucent Connector “SFP” (Duplex)
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REFERENCE