Doing It Yourself TV Cabling
ANTENNA CHECK LIST
Is your antenna system in good condition?
Ensure all the cross pieces on your antenna are intact and not corroded. Make sure any plastic junction boxes on the antenna are not cracked - these units are easily effected by moisture.
Also check the antenna lead and antenna connections at either end for cracks in the plastic covering. Antenna connections are the most likely places for damage to occur, and are simple to replace. Again, moisture can effect connections, and effect signal quality.
Do you have the correct antenna?
Outdoor roof-mounted TV antennas receive a stronger signal and therefore provide better reception than indoor antennas. Electrical wiring, wall insulation and even people moving around a room can cause interference to the signal received by indoor antennas.
If you have moved your antenna from another area, a new TV channel has commenced broadcasting or an existing channel has changed, then you may need to modify your antenna system.
Choosing the correct outdoor antenna depends on the channels available in your area. TV channels operates on either Very High Frequency (VHF) or Ultra High Frequency (UHF) bands. VHF channels range from 0 to 12 and UHF channels are numbered 28 to 69. A local antenna installer will be able to recommend the best antenna for your area.
Signal strength is another factor in choosing the optimum antenna for your area - viewers close to a TV station or transmitter will require a different system than those living on the edges of the transmitters broadcast area.
Is your antenna correctly positioned?
Your antenna should be pointed directly towards the nearest transmitter. It is important the antenna is pointed at the correct signal source. In some areas there may be a main transmitter which feeds TV signals to a number of smaller ‘translator’ transmitters which rebroadcast the signal. A local antenna installer can advise the best target for your antenna.
Trees, buildings and hills in the direct path of your antenna may weaken the signal and cause reception problems. If you can’t see the transmitter, experiment by pointing the antenna in different directions. More consistent UHF signals can sometimes be obtained by pointing a UHF antenna above nearby trees and shrubs rather than directly at them.
Your antenna should be installed with the cross pieces vertical or horizontal, to match the signals you wish to receive. Some television stations transmit signals horizontally, others transmit signals vertically.
Are the correct antenna lead connections installed?
There are two common types of antenna lead and each requires its own particular connections, both at the antenna and at the TV receiver. Check your TV manual to ensure the right ones have been used.
Do you live in a unit, hotel or caravan park?
If you live in a block of units, hotel or caravan you may have a more complex ‘master’ antenna system, where the signal is distributed from a shared antenna system. Usually you will be provided with a wall mounted antenna socket. If this is the case and you are experiencing reception difficulties, particularly on more than one channel, consider contacting the Body Corporate or landlord to arrange for an antenna specialist to check.
(Source ABC TV Australia.)
Doing It Yourself TV Cabling
DOING IT YOURSELF (DIY) TV CABLING
INFORMATION FOR CONSUMERS PURCHASING COMPONENTSFOR USE IN DIY INSTALLATIONS
Installation Requirements and Recommendations with Specifications of Components Used
(CABLES, CONNECTORS, OUTLETS AND SPLITTERS)
Doing It Yourself - Things To Consider
Advantages & Disadvantages of DIY
While doing it yourself might seem a good proposition from the point of viewof savings in total costs involved, the degree to which this can be achieved can vary greatly depending on a number of factors.
Firstly, if the installation site from the point of view of TV reception is difficult,it is unlikely you will be able to achieve a satisfactory result, even if your installation techniques are correct.
Secondly, if your installation efforts are incorrect (poor connections due tolack of the required tools, etc) even the best components will perform unsatisfactorily.
Thirdly, the process of installation will invariably involve the use of ladders,walking on and climbing onto roofs and into ceilings, and crawling under buildings. Also the use of power tools may be required.
Unless you have previous experience of the correct techniques required, and have the recommended safety equipment at hand, doing it yourself can easily lead to damage to property and serious personal injury. So start by assessing the above factors and, if the DIY way is practical in all aspects, ensure you use the recommended components and follow the correct techniques given in this guide to ensure the best outcome for your labours.
Doing It Yourself - General
The information provided below is a guide for the selection of components such as coaxial cable, connectors, outlets and splitters. This will provide the necessaryperformance for both new digital and existing (analogue) TV reception.
These requirements are the minimum as specified by Australian Standard AS1367-2000 for the distribution of TV signals.
Doing It Yourself TV Cabling Page 2
While the strength and quality of received TV channels will vary from site to site, andbetween channels at the same site, the selection of components in line with these recommendations ensure that signals reaching TV receivers do so with the least loss and distortion.
Minimising loss and distortion is achieved by using components which
ocause the least loss to signals passing through them
ocause the least distortion to signals by being suitable for installation on the required cable & connectors and ensuring they are correctly installed
oprovide good screening from external interference
Good screening is important with all components particularly with cable.
Because of the particular susceptibility of digital TV to impulse noise, and in order to provide the most beneficial conditions for digital TV reception, quad shielded cable is recommended, especially in areas close to transmitters of any power or to other strong sources of interference.
This is also important with Outlet-to-TV and with VCR-to-TV connecting leads (fly leads).
Connectors should be the correct type to match the cable. Universal connectors are
available that fit the majority of quad shielded RG6 cables.
Cable needs to be prepared using the correct stripping tools, and connectors need to be installed by being hex crimped to cable ends with the correct crimping tools.
Do not use screw-on F type connectors, only crimp-on types.
Using incorrect methods or tools will result in poor connections, leading tointermittent or continuous faults.
Where splitters are used, any unused ports should be terminated with a 75˝ F typeterminator to ensure correct matching.
When connecting cable to outlets, splitters, etc, F connectors need to be tightenedappropriately using the correct size spanner, so that they cannot be undone without the aid of a tool (i.e. not finger tight) as over time vibrations will cause loosening of connections.
Similarly DO NOT over tighten connectors as immediate damage can be caused thatwill render some components useless.
As a rule of thumb do the connector up finger tight & then tighten further with thespanner by one half of one flat portion of the hex shaped securing nut or 30 degrees maximum.
Source of Standards
This guide is based on Australian Standards, which are obtainable from Standards Australia directly or via their web site athttp://www.standards.org.au.
For the Complete set of this Guide, please open the following PDF Installation file. (Courtesy of the Digital Broadcasting Association and Standards Australia.)