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Your Guide
To the forms
of PC Networking
PC networking is no longer just confined to
the office; there is now a growing trend for
networking at home |
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PC Networking
More and more families have two or more
PCs, all wanting to share internet access etc;
networking is the perfect way to achieve this.
There are three forms of networking: wired,
wireless and networking over the mains.
Wired Networking:
If your are comfortable in your DIY and drilling
capability, then this is the most reliable form of
networking. It consists of network cards and network cables that you run through walls and ceilings to each PC in the house.
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| Pros - |
• Guaranteed connection due to
using wires
• Reliable data transfer |
| Cons - |
• Wires can be tricky to place
• Set up time can be lengthy
• Having loose wires could be a
safety hazard and closing doors
could ‘pinch’ and break the
connection
• Expanding the network is
difficult or costly |
| Expert's tip - |
• Always buy more cable ends than
you need. They will not all be fitted
perfectly first time! |
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Wireless Networking:
This is the most convenient form of networking –
no mess, no fuss, no drilling. You can take a wireless
ADSL modem, plug it in to a microfilter and then in to a
telephone socket. Now any PCin your house with a
wireless adaptor can access the internet. |
Networking over the Mains:
This is a combination of the features of wired and wireless and uses the mains wires to transmit the signals. It works by converting the Ethernet to mains and vice versa. Each device, such as a router or PC must be linked via an Ethernet cable to the HomePlug adaptor, which is plugged in to a wall socket. You just
plug a router in one room and get broadband to another room in the house with an Ethernet adaptor in the socket. |
| Pros - |
• Most of the benefits of wireless plus:
• Convenient set up – limited software needed
• Does not have the signal problems wireless
does
• The simplest network to expand; just buy
an adaptor and Ethernet cable for the new
device
• Excellent for multi-story houses where wiring
could be messy and wireless may be out of
range for some PCs |
| Cons - |
• Usually more expensive than the other options
• Not as reliable as wired network
due to its limited range |
| Expert's tip - |
• Usually needs to be on the same ring
main |
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| Pros - |
• Quick set up
• No need to trail cables across the house
• Can get across ADSL lack-of-signal
problems (when people have a computer upstairs and no telephone point)
• Can add more devices to the network with minimal effort
• You can sit in your garden and browse the web |
| Cons - |
• If not set up correctly (password protected) anybody can tap in to your internet and unprotected computers
• Data rates can often fluctuate or disconnect, so it is not ideal for gaming
• Can be complicated to set up for the beginner
• Signal strength is reduced by walls etc |
| Expert's tip - |
• The signal can be affected by water tanks and pipes |
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| Jargon buster |
| 802.11(letter) - |
It means wireless network (they are
standards laid out by the IEEE e.g.
802.11g with a data rate between 25 and
54 Mbps |
| 802.11g+ - |
An enhanced version of g which offers slightly
better range and speed
(up to 140Mbps max) |
| 10/100 - |
Transfer speeds of 10Mbps or 100Mbps
(10 is the old standard, 100 is now the norm) |
| CAT5 - |
With regards cabling: 10/100 Mbps speed |
| CAT6 - |
With regards cabling: 10/100/1000 Mbps speed |
| Gigabit or 10/100/1000 – |
1000 Mbps (can still be
used for home use) |
| LAN - |
Local Area Network (Home/Office Network) |
| Mbps - |
Mega bits per second
(NOT MB Megabytes like in hard drives) |
| MIMO - |
Multi In Multi Out – uses more aerials for
increased range and speed |
| NIC - |
Network Interface Card |
| RJ11 4/6- Pin connector - |
used for ADSL telephone
cable – found on modems
or modem routers |
| RJ45 8-pin - |
Ethernet connection
(standard networking connection) |
| STP - |
Shielded Twisted Pair (cable) |
| UTP - |
Unshielded Twisted Pair (cable) |
| WAN - |
Wide Area Network (Internet) |
| WEP - |
Wireless Encryption Protocol
(password protection for WLAN) |
| WLAN - |
Wireless LAN |
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| What does all this equipment do? |
| Access Point |
Fundamentally converts a wired network
to wireless |
| Hub/Switch |
Used so that multiple computers can talk
to each other
Will not share broadband |
| Microfilter |
Connects an ADSL modem to a phone
socket |
| Modem Router |
Most ADSL suppliers provide a USB
modem meaning they will not fit into a
router
You can buy ADSL modems and routers
in one box |
| NIC |
Gives your computer an Ethernet socket
to use network cables |
| Router |
All the functions of a hub/switch
Will share broadband
Will split the internet down
The majority have a switch built in
Routers should have a RJ45 socket to
accept the broadband modem |
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| Cable is provided by TV companies via and RF aerial
cable. You can receive TV, telephone and internet through
this channel. ADSL is exclusively through a telephone line. |
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Your Guide
To setting up your
own CCTV system
Security solutions to protect you and your
family in your own home
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Your Guide
To setting up your own CCTV system
Security solutions to protect you and your family in your own home |
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What is Do-it-Yourself CCTV security?
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18% of people have been the victim of crime in the last 12 months. DIY or 'plug 'n' play' CCTV (Closed-Circuit Television) security
empowers users to take control of their home and business, simply and affordably protecting their family and assets. |
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Why 'do it myself'?
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Traditionally, security companies have been relied upon to install and monitor systems for homes and businesses.
For a fraction of the cost of professional surveillance, DIY CCTV security puts the user in control and offers ease of
use, convenience and a range of simple solutions. |
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What could I use DIY CCTV security solutions for?
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| Research shows the most common reasons for using CCTV in the home and business are: |
| Safety |
To safeguard and monitor loved ones |
| Cost saving |
As an investment to protect valuable property, without the expense of professional monitoring |
| Deterrent |
To deter thieves, graffiti and prevent unwanted behaviour |
| Convenience |
To create a 'smart home' integrating cameras with your TV, PC and more |
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Which solution is right for me?
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Do you want to monitor your home, office, family, retail store, warehouse or building site?
Do you need day filming, night vision or both, sound, high-resolution, mono, colour, water-proofing, wired or wireless from your camera?
Do you want to view the one, two or more cameras?
Do you want to connect through a TV, monitor or handheld viewer or record through a digital video recorder (DVR) or VCR? |
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| Types of CCTV Cameras: |
How do I record video
from cameras? |
New digital video recording (DVR) technology enables users to
simultaneously monitor and record numerous cameras at one
time with motion detection triggers. The video is saved on to a
hard drive and can be played back on the DVR or transferred to
alternative media. |
| How can I monitor remotely? |
Many DVRs now include software and an Ethernet port to
enable viewing on remote PCs with broadband internet
connections. Video is sent to the host PC via the DVR, PCI card
or USB; the remote PC, with the appropriate software, is then
able to access video streamed over the internet or network
connection. More sophisticated systems email and SMS alerts in
event of the camera's detecting motion. |
Can other devices interfere with
wireless CCTV? |
Yes, some common causes of interference are wireless LAN
equipment, cordless 2.4GHz telephones and microwave ovens
(whilst they are actually cooking). Using a camera that has four
switchable channels will allow you to change to a channel that
is further away from the interference source to minimise the
potential for interference. |
What are the legalities of CCTV
monitoring? |
Before using any camera for any purpose, it is the buyer's
responsibility to be aware of all applicable laws and regulations
that prohibit or limit the use of cameras and to comply with the
applicable laws and regulations. |
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How do I connect a camera to my TV? |
| Wireless Cameras |
Wireless camera receivers come with an AV (audio and
video) cable that plugs in to the video 'in' and audio 'in'
connectors on a TV or VCR. These plugs are commonly
referred to as phono plugs; similar to the connectors used by
game consoles and DVD players
If you plug the wireless camera's receiver in to a VCR to
record the footage, you will need to select the channel on the
TV normally used for films from your VCR. You will need to
select the AV channel to record on VCR. To view this, select
the channel on the TV normally used for films from your VCR.
Plugging the receiver directly in to a TV will allow you to view
the image on the appropriate AV channel, but you will not be
able to record them.
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| Wired Cameras |
Wired cameras use phono plugs to connect to the AV 'in'
sockets. You simply connect this to your TV to start
monitoring your DIY security solution. |
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Commonly used CCTV Security Terms |
| CCD |
Charge Coupled Devices. A high quality image sensor commonly
found in portable camcorders and similar video equipment |
| CMOS |
Complementary Metal Oxide Semiconductor. A medium quality
image sensor used in digital cameras and many low-powered
image devices such as USB webcams |
| Infrared (IR) |
Infrared night vision allows cameras to 'see in the dark; or in low-light conditions, using IR LEDs (Infrared Light Emitting Diodes) as illumination for a camera. |
| TVL |
Television Lines. The resolution of a video device; a higher number signifies higher resolution and increased picture quality . 380 TVL is medium resolution; 480 TVL or greater is high resolution |
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Your Guide
Components that
make up a PC
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Your guide to the
Components that make up a PC |
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| What makes up a PC? |
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| Processors |
| The processor is one of the major components that determine a computer's performance. |
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| What difference do the different processor speeds make? |
The speed is measured in Gigahertz (GHz). Generally the better processor, the faster your computer will run: an Athlon 3200 will
not have the same power as a Athlon 3500. This is the speed of the computer brain. |
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| What are the advantages of dual-core processors? |
A dual-core CPU combines two independent processors and their respective caches and cache controllers on to a single silicon
chip or intergrated circuit allowing you to run more applications simultaneously compared to a single core processor. |
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| What is MHz FSB for processors? |
The units used to measure the frequency of electric vibrations per second, typically this is used as a measure of a processor's
Front Side Bus (FSB). Eg.533MHz FSB. In computers, the front side bus or system bus is the physical bi-directional data bus that
carries all electronic signal information between the central processing unit (CPU) and other devices within the system such as
Random Access Memory (RAM), AGP video cards, PCI expansion cards, hard disks, the memory containing the system BIOS etc. |
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| What is cache? |
Cache is a computer's short-term memory and is measured in Kilobytes (kB) and Megabytes (MB). Recently modified documents are
stored in the computer system's cache allowing you to access them quicker. The more cache in a computer's processor, the better
the computer will perform. |
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| Motherboards |
| The motherboard of a computer is the primary circuit board where all the internal components of a computer are connected. |
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| Memory |
Memory is measured in Megabytes (MB) and Gigabytes (GB). The more memory you have in your computer, the quicker the
processing of documents, downloads and programs. |
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| RAM |
RAM (Random Access Memory) is where the computer system
stores software applications and data that are being used. DDR
or Double Data Rate effectively almost doubles the stated data
transmission rate. Like DDR, DDR2 is a form of RAM. DDR2 is
the next evolutionary step in the DDR infrastructure. |
| Power supplies units (PSUs) |
You need to ensure your power supply can provide enough
power for your PC, so as general rule; the more wattage, the
better. If you want to run dual graphics cards, you will need
two graphics power connectors that most PSUs don't have;
certainly on the lower wattages. Modern PSUs have a hugh
amount of connectors, so to help out, we've complied this
handy guide to steer you through the power cable minefield: |
4-Pin ATX 12V - This small connector is usually located next
to the Central Processing Unit socket and provides the CPU
with an extra dose of current at 12V. |
8-Pin EPS 12V - Not surprisingly, dual-core CPU and dual-
CPU motherboards require twice as much power as single-
processor designs. This connector is essentially two 4-pin
ATX 12V connectors linked together. |
24-Pin ATX - Modern motherboards consume more power
than their predecessors, so the 24-pin ATX connector
replaced the 20-pin. |
Molex - The 'handyman' of PSU connectors, used to provide
power to everything from hard disks to graphics cards. If your
PSU doesn't have enough Molex connectors, it won't perform. |
PCI-E - This 6-pin connector was recently introduced to
provide extra power for graphics cards. If you want to build
an SLI PC then make sure your PSU has two PCI-E connectors. |
S-ATA - This is not the strongest of connectors. It powers
S-ATA and S-ATA II hard disks and optical drives. |
Hard Drive - The hard drive (hard disk) of a computer
provides you with space to store your programs and personal
files and is measured in Gigabytes (GB). Although the size of
hard drives in today's computers are generally larger than you
will require; you can never be too sure, so the larger the better.
A gigabyte (GB) is a data storage capacity measure that equals
approximately 1000MB or 1 billion bytes. |
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Optical Drive - Most disk drives available today have the
ability to read and write DVDs (Digital Versatile Discs) and
provide a far greater storage capacity (around 5GB compared
to 700MB on a CD). This in turn means that you can store more
multimedia files such as films, music and photos on one single
disc. |
Graphics Card - Graphics cards are responsible for the
quality of images displayed on your monitor. A good graphics
card is needed for graphics intensive tasks such as computer
gaming. |
| There are five types of card: |
PCI - allows you to upgrade your computer quickly and easily.
Mainly used for adding soundcards, modems, TV cards etc. |
AGP - Replaced the PCI. Much better performance and
therefore much better for gaming. |
PCI-E - (PCI Express) The latest graphics cards: as future
proof as an IT component can be. You need a PCI-E slot on
your motherboard to use one. |
SLI and Crossfire - NVidia's SLI and ATI's Crossfire
technology represent a major revolution in 3D gaming and
rendering. Both SLI and CrossFire combine two graphics cards
to produce nearly twice as much 3D processing power than
just a single card. |
| The Anatomy of a PC Motherboard |
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| Sound card - Together with the speakers, a sound card determines a computer’s ability to reproduce sound for watching DVD movies, listening to music and realistic game sound effects. Most computers come with a built-in sound card, a separate sound card that can be fitted into a computer’s expansion slot offers better sound quality and added features for recording and creating digital music and sounds. |
TV Cards - A TV tuner allows you to watch free-to-view analogue/digital (depending on the PC) television on your computer.
It also allows you to record television on to your hard disk. |
| Operating systems (O/S) |
Windows - Windows XP Media Center provides the advanced computing power of Windows XP Home and also allows you to
watch DVDs, record TV (if the PC has a TV tuner), listen to music, share your digital photos and more; all through simple, easy to use menus. The new Vista range represents the next generation and a different style of Windows operating system. |
Linux - A similar O/S to Windows, based on a graphical user interface. The major difference is that Linux is largely free to
download over the internet. You may have to pay for support services. |
| PCI expansion slots |
PCI - (Peripheral Component Interconnect) expansion slots allow your computer to be compatible with future technology or
additional hardware such as memory. Most computers now have several PCI slots allowing you to easily upgrade your computer. |
| PCI-X! - Not used for graphics but uses up less space and power than the normal PCI. Used for modems, TV Cards and soundcards. |
| USB Connections - Universal Serial Bus connections allow you to Plug ‘n’ Play’ peripherals, such as a printer without needing to shut down the computer. The more USBs, the better: USB 2.0 is much faster than USB 1.0 at speeds up to 480MB/s. |
| PC Case |
| ATX – Standard form factor for putting a motherboard in. |
| Micro ATX – Smaller than ATX. You may need to buy a micro ATX motherboard to fit. |
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What does that mean?
AGP – Advanced Graphics Port
ATX - Advanced Technology eXtended
BIOS - Basic Input / Output System
Clock speeds – Number of clock cycles –the speed of processing of your chip
CPU – Central Processing Unit
DDR – Double Data Rate
DVI - Digital Visual Interface
FDD – Floppy Disc Drive
HDD - Hard Disk Drive
Heatsink Fans – Cools the chip. A good fan cools better and increases the chip’s performance
Modder – Someone who ‘styles’ their PC
Overclocking – Increasing the voltage to get more processing power. Shortens the life of your PC
PSU – Power Supply Unit
PATA - Parallel Advanced Technology Attachment
PCI - Peripheral Component Interconnect
PCI-E - PCI Express was formerly known as Arapaho or 3GIO for 3rd Generation I/O
RAM - Random Access Memory
SATA - Serial Advanced Technology Attachment
SLI - Scalable Link Interface
VGA - Video Graphics Array |
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Your Guide
To Solar Power |
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Solar Power...
The earth receives more solar energy in one hour than
the entire planet consumes in a year!
Solar energy is now an established power source used
for numerous commercial and domestic applications. It
is renewable, sustainable and non-polluting. It is also
highly cost-effective.
Solar power is not just for committed environmentalists
or people with large sums of money; we can all do our
bit to help the environment by making just a few
small changes.
What is solar power?
• It is a way of converting sunlight into a useful energy source such as heat or electricity, via a small solar panel, that 'collects' the light and stores it for later use
• It works on light, not heat
How does solar power work?
• A solar cell (or photovoltaic cell) generates electricity
directly from visible light; converting the sunlight directly
into electricity
• Solar panels may be used singly or wired together into an
array to provide larger amounts of power
• The number and size of panels needed is determined by the
available light and the amount of energy required
• The amount of power generated by solar cells is determined
by the weather and time of day. In the majority of cases,
some form of energy storage will be necessary
What are the types of solar cells?
There are three basic types of solar cell:
• Monocrystalline cells - cut from a single large crystal of silicon
• Polycrystalline cells - made from a number of crystals
• Amorphous solar cells - most often seen in small solar
panels, such as those in calculators
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How is the power stored?
• Smaller appliances such as solar lights and solar mobile
phone chargers store the energy collected in rechargeable
batteries, enabling them to work during darkness
• Self-contained systems, where no connection to the mains
grid is available, charge a lead-acid battery
• For solar applications, a battery needs to be capable of
being discharged hundreds or even thousands of times.
This type of battery is known as a deep-cycle battery
How is the power controlled?
• Often more energy is collected than actually needed so
most panels are fitted with a voltage regulator to control
the flow of energy and prevent battery damage due to
overcharging or over discharging
• The voltage regulator prevents damage to the battery by
diverting power away once it is fully charged, or switching
off any DC appliances when the battery voltage falls
dangerously low
• Only a very small solar panel does not require a regulator |
How much power do I need?
• The smallest systems may only require 12 volts, but in
bigger systems, 230 volts will probably be needed
• An invertor is used to transform the low voltage DC
generated by the solar panels into mains voltage AC,
which can be used to power larger AC appliances, such
as televisions
What are the advantages of using
solar energy?
• Inexhaustible fuel source - fossil fuel and electricity are
limited
• No power costs - for smaller items such as solar lights,
radios, battery chargers etc
• Initial set up costs for large installations (roof solar
panels) can be offset with grants and payback within
seven years. After that, you get free power
• Portable - where mains power does not exist, for
example in remote or rural areas, it will often be cheaper
to install a solar PV system rather than paying for a
mains connection
• Environmentally friendly - no air or noise pollution
• Long-lasting - life-spans of the systems are also high,
lasting at least 15 - 20 years
• Versatile - can be used for powering items as diverse as
solar cars and satellites
• Aesthetic - solar panels are usually between 25mm and
50mm thick so they can clad a roof or wall without
taking anything away from the building’s appearance |
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What products can I buy?
• Solar battery chargers (for rechargeable batteries, AA,
AAA)
• Freeloader and Scotty to power and charge small devices
(mobile phones, MP3 players etc)
• Solar briefcase generator
• Solar panels
• Charge controllers
• Solar batteries
• Solar lights (garden and shed light, portable light)
• Solar radio, solar garden thermometer
• Solar accessories (panel stands, panel bags, panel
mounts)
• Solar trickle chargers
• Educational Solar Kits |
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Your Guide
To using digital
wireless video senders
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What is the point of an
Audio/Video sender?
An audio video (AV) sender solves a problem that is
becoming more and more common amongst home
owners: having a DVD, satellite or cable TV
in one room in your home and wanting to watch the
programme elsewhere in the house; but without
having to lay messy cables. For example:
• You want to link your brand new
DVD player to your hifi on the other
side of the room
• Your son/daughter wants to watch a
Freeview programme on television
in their bedroom
• You don’t want to drill holes or leave
trails of cables in the lounge
• You want to link a security video camera
to a video recorder in another room
AV senders can distribute all your audio and video
equipment signals anywhere in the home.
How does it work?
The AV sender transmits the signal from your DVD
player, video, hifi, camcorder, digital Freeview box or
satellite system; to wherever you want to enjoy it;
be that the bedroom, kitchen, or even outside.
There is no wiring required; the signals simply go
through most walls, ceilings and doors. They even
give you the ability to change channels from the
remote location via a remote control. |
How easy is this to set up?
Very easy. Simply connect your equipment to the
transmitter using a SCART lead. This sends the audio
or video signal directly to the receiver using a wideband
FM signal. You then connect the equipment you would
like to receive the audio or video signal to the receiver
using a SCART lead.
Signals pass through walls, floors and ceilings thanks
to the fact that the system uses wideband FM
transmissions. This also minimises interference from
other wireless AV transmitters.
The rest is as simple as ‘plug ‘n’ play’ installation and
takes just a matter of minutes. The antennas are
integrated into the units and connections to source
equipment and TVs are made using familiar SCART
cables.
Where other cables are used, they are all colour-coded,
just match them i.e. red to red and you are ready to use
your unit. |
Frequently Asked Questions
Can I watch a DVD in one room whilst
another TV shows satellite?
Yes, but this will require a second AV sender attached
to the source device and the second TV
Do I have to go back to the main source
to change channels?
No. You can use the original remote control, as most
audio/video senders have a remote control extender.
A cord with an infrared eye and a jack plug is provided
to send the remote control signal back to the
originating source. Please note: there are a few
anomalies with certain cable and satellite units,
particularly NTL, Telewest and Sky, but Maplin has a
large range of video senders to fulfill your requirements.
Can I use/send images from my security
camera to my TV?
Yes, you can send almost any video source to a TV. |
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What if my TV does not have a SCART socket?
Maplin sells a special video sender (which is known
as an RF modulator) which can connect to a TV
without a SCART plug through the aerial socket. It
provides additional channels without affecting existing
ones.
What if I want to play a DVD in the bedroom
and also watch TV in the kitchen?
You can do this with one of our 2 or 4-input
audio/video senders. These units allow you to plug
either two or four different units in
to the sender and receive either of these devices
on a separate TV.
Can I play a video in two bedrooms and still watch
the TV in the living room?
Yes, most of the units we sell have an additional
receiver unit allowing you to have a receiver in one
bedroom and one in the other, meaning the same
video can be viewed in both rooms.
How far can I transmit signals?
Maplin has two long-distance units: one that transmits
over 1000 metres with no obstructions, and one that
will transmit 5000 metres with no obstructions. These
units are specially designed for outdoor use with
waterproof housings and a special antenna to send
the signal over a long distance.
Will my neighbour’s video sender signals conflict
with mine?
All Maplin video senders can operate on three or four
different frequencies. This allows you to switch
the frequency if there is any interference from a
similar unit nearby. |
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Your Guide
To making FREE*
calls using the
internet
If you already have a broadband internet connection, you could be saving substantial amounts of money when making phone calls. |
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What is VoIP?
VoIP or Voice over the Internet Protocol is a
technology for transmitting conversations
over the internet. Using programs such as
Skype™, MSN® Messenger or Yahoo® Messenger, voice data is sent over the
internet rather than by traditional dedicated
telephone circuits.
Why use VoIP?
A big advantage of VoIP is that you only pay for the
access to the internet and not the phone call to
people using the same software. It’s the same
principle of not buying a stamp to send an email.
Some VoIP services will also allow you to make
and receive calls to landlines.
How much does VoIP cost?
If you already have a broadband internet
connection, VoIP calls, video calls and file transfer
between people using the same software is free;
you can’t however call between different programs.
Some programs offer a call out or SMS service to
landlines and mobiles all over the world at very
cheap prices on a pay-as-you-go arrangement.
Some also offer a call in and voice mail service for
a fixed annual cost.
Why should I use it?
VoIP is useful to everyone, but it really comes into
its own if you talk frequently to the same people:
students away at university, businesses and their
suppliers or customers and parents of teenagers
who seem to be constantly on the phone to their
friends could all benefit greatly from using VoIP. |
What do I need?
To use VoIP, you will need a PC or laptop with a
broadband internet connection, a VoIP program and
some type of audio hardware to talk and listen through.
Most VoIP programs are available for Windows and
Linux
What about the software?
Several VoIP programs can be downloaded for free
and many people have two or even three VoIP
programs installed on their PC. Among the most
popular are Skype™ - available from www.skype.com,
MSN® Messenger (www.messenger.msn.co.uk),
Yahoo® Messenger (www.messenger.yahoo.com) and
VoipCheap (www.voipcheap.co.uk). |
And the hardware?
The hardware for using VoIP could be as simple as
the speakers and a microphone that plugs into your
PC or a headset with a microphone, if you require a
little privacy. Alternatively, for the traditional telephone
experience, you could use a telephone handset that
plugs into your PC’s USB port. Some of these are able
to control the VoIP program through the
handset. Cordless phones are also available.
Many Bluetooth® mobile phone headsets, combined
with a compatible USB Bluetooth® adaptor, are also
suitable and provide a wireless handsfree alternative.
There are also adaptors available that enable you
to connect your regular phone to your PC and your
landline at the same time. Some of these will also
allow you to forward VoIP calls to another number via
your landline if you wish. |
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| Using a VoIP Handset |
Using a Normal
Landline Telephone |
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What equipment
do I need?
Soundcard Handset - A telephone handset that replaces
your speaker and microphone by plugging into the mic and
speaker ports on your PC’s soundcard. It is inexpensive and
easy to set up, requiring no additional configuration or
software to operate.
USB Handset - The most popular solution. The handset
acts as a PC soundcard when it is plugged in. Some are
supplied with software which enables you to control the
Skype™ program through the handset. Some also have a
display which can show information from your contacts list etc.
Analogue Telephone Adaptor (ATA) - A box that
connects to your PC via USB allowing you to connect a
regular landline telephone to your PC for use with VoIP.
Most will also allow you to connect your phone to the
landline at the same time and some redirect VoIP calls via
the landline to another phone. Others will also allow you to
control Skype™ through the phone.
DECT cordless VoIP handsets - Similar to USB
handsets; the base station of the phone connects to your PC
via USB, but with the advantage of not being tied to the PC
while using VoIP.
Some VoIP DECT phones are designed to be connected to
the landline at the same time and can make and receive
calls from both VoIP and landlines. Many are able to control
the Skype™ program from the handset. |
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Your Guide
To using Digital
Satellite TV
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Your guide
to using Digital Satellite TV |
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| Why would I need digital satellite? |
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Sometimes a satellite system is the only way to receive TV signals; especially in certain areas in the UK. The advent of digital TV and particularly high definition (HDTV) broadcasts means that satellite provides great home
entertainment.
Systems available through Maplin are designed to enable you to make a one-off purchase without any costly monthly subscriptions. You can then open up a world of free-to-air channels.
So, if you have an existing satellite system and are thinking of upgrading your dish or receiver, or you are new to digital satellite TV we have systems and components to fit all budgets. |
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| How do I set up a satellite dish? |
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Setting up a satellite system in your home is relatively straight forward and any DIYer can do it. Firstly, you have to ensure that the fixing to which the satellite dish is affixed is secure. Secondly, the dish has to be aligned perfectly otherwise you will
not get a signal. To give you an idea it is like pointing a gun at a motor car 22000 miles away, but with a small amount of trial and error. This isn’t as complicated as it sounds; Maplin provides the help and gadgets to make it easy!
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1) To receive satellite signals, the satellite dish has to be in
the direct line of sight of the satellite. Trees or buildings
will interfere with the signal.
2) Work out where you are going to place your dish: it has
to be in a south-facing position and be able to move
across the sky horizontally.
3) Bolt two securing bolts on the wall and affix the dish
4) It is better to set the angle and elevation first. Typically
in the UK, this angle varies from 20 degrees in the North
to 30 degrees in the South. (A more accurate elevation
calculation is available on our website)
5) Now you need to position the dish on the horizontal
plane (see below diagram): the Astra satellite is 28.2
degrees east of South. A Maplin compass will quickly
allow you to set the angle at which the signal hits the
dish.
6) Fine tuning is all that is needed to pick up your
satellite signal. We have the tools which can help you:
Sat Finder (BZ68) or Sat Beeper (A97FG) Using a meter
will allow you to align the dish more accurately to the
point at which a slight flex of the dish in any direction
shows a reduction in signal.
7) You are now ready to tune in your receiver and use the
on-screen signal strength meter to get it just
perfect.
8) Now sit back and relax, you are ready to enjoy the
largest range of TV stations available. |
How do I set up a twin
satellite system? |
To get even more TV and radio channels, you can receive
signals from two satellites through one dish.
What is commonly known as a dual-focus system can be
achieved by simply fitting a monoblock low noise block
converter (LNB) – essentially two LNBs in one with a fixed
spacing between them that fits in your dish's LNB clamp.
The most common use of this type of system is to receive
the ASTRA satellite at nineteen degrees and the HOTBIRD
satellite at thirteen degrees for those interested in foreign
channels. A monoblock LNB has a spacing of six degrees
so allowing both satellites to be received. Generally an
80cm dish is required to achieve this.
Just line up the LNB on the main satellite you require,
another satellite will already be lined up due to the preset
spacing of the LNB. The switching between the two
satellites is done by the (Digital Satellite Equipment
Control) commands in your receiver's software (All Maplin
satellite systems are equipped with DiSEqC™)
A multi-LNB holder allows the user to put two LNBs (two
singles, two twins etc.) up to thirteen degrees apart ie. for
Astra 19, Hotbird and a third satellite; effectively creating a
‘super dish’. It can hold up to two different LNBs giving it
the ability to receive satellite signal from three different
satellites. |
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What about motorised systems?
To use a motorised satellite system, you need a dish of 80cm minimum, a motormount and a receiver.
With motorised systems, your dish can move from east to west to track the satellites, positioning along what is know
as the ‘Clarke belt’. When the whole of the dish is facing the satellite it is positioned at firstly 19 degrees, then secondly
13 degrees for example.
The unit that turns the dish is called a DiSEqC™ motormount and utilises a datastream passed up the LNB lead to the
mount; this means that only one co-axial cable is needed for installation.
When correctly installed, your satellite system will be able to receive a multitude of TV and radio channels from around
the world. |
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Go on to the website to see a full list of
channels available
Coax or coaxial cable - used by all satellite TV systems
DiSEeqC - Digital Satellite Equipment Control system, which is a communication bus between satellite receivers and
peripheral equipment
Dish - used to collect signals from a satellite in orbit and focus them to the front of the dish where an LNB collects
them and passes the signals on to the receiver
Feed Horn - collects the signals at the focus of the satellite dish and channels them to the LNB
LNB - Low Noise Block device located on the front arm of the dish that receives the bounced satellite signals from the
dish reflector. Amplifies the weak signal and lowers the signal frequency to a frequency capable of travelling down a coax
cable
Monobloc - two LNBs fixed together to provide a signal for two satellites six degrees apart. Only one satellite signal can
be received at a time. Not to be confused with a twin-LNB
Receiver - the unit which takes signals from a satellite dish and converts them to TV pictures
Splitter - distributes a television signal carried on a cable in two or more paths, sending it to a number of receivers
Twin LNB – has two coax connections allowing you to receive two signals independently. Using a twin-tuner, you can record
on one satellite whilst watching another |
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Your Guide
To protecting yourself
against ID theft
the crime may be painless but the outcome certainly isn’t!
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Your guide
To protecting yourself
against ID theft
the crime may be painless but the outcome certainly isn’t! |
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Identity theft...
is not just something that happens to ‘other people’; the chances of it happening to you are very real. It is
one of the fastest growing white collar crimes in the UK, affecting to over 100,000 people and costing the
economy £1.7 billion a year.
Criminals no longe | | | | |