TV Aerial/Antenna Installation & Repair,Digital Set Top Box Brisbane,Coboolture,Sunshine Coast

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What is a TV Signal?
A TV signal is a radio frequency or RF signal transmitted through the air from a TV station's broadcast tower and is received by your TV antenna. The RF signal is modulated by the audio and video components of the TV programs that originate from the TV station's studio. There are two types of TV signals: analogue and digital.

How are the TV Signals Transmittted?
The TV signal is first sent from the TV station's studio to the transmitter facility where the TV signal is converted to an RF signal or electromagnetic waves. The RF signal is then broadcasted at an assigned TV channel through a transmitter antenna that is usually located on a high tower, on top of high buildings or on a mountaintop. The purpose of placing the antenna on the highest location possible is to have the widest coverage available. The bandwidth of a TV channel is 7MHz (megahertz), all of which is utilized by a single program in analog broadcast. In digital broadcast, the whole channel can be used by a single HD (high definition) program or by multiple SD (standard definition) programs.

TV frequencies in Australia consist of three bands:
VHF Low (Very High Frequency Low) - signals are transmitted from 45 to 70 MHz.
VHF High (Very High Frequency High) - signals are transmitted from 85 to 230 MHz
UHF High (Ultra High Frequency High) - signals are transmitted from 470 to 862 MHz

What is a TV Antenna and How it Works?
The TV antenna picks up the TV signal on air and sends it to the TV set or set top box for conversion to the original audio and video signals from the TV station. The antenna is usually specified an antenna gain expressed in decibels (dB). The higher the antenna gain, the better is its performance in receiving TV signals. Related to this specification is the directvity of the antenna. This refers to its ability to favor signals arriving at the front of the antenna and rejecting all possible interference from the other directions. The antenna gain and directivity are both determined by the number of elements or rods that make up the antenna. Also take note that antennas with longer elements are intended for VHF channels while those with shorter elements are for UHF channels.

From the antenna, a coaxial cable is used to bring the RF signal to the TV set or set top box. It is called coaxial because it consists of a center conductor surrounded by an insulating material and then a screen layer made up of a metal braid. The outer layer or jacket is made up of plastic for protection from rain and sunlight.


How to Choose the Right Antenna?
The first thing to do when looking for a TV antenna is to check what channels are available in your area. In capital cities, since both VHF and UHF channels are present, use combinations of VHF and UHF antennas. In all other areas where there are only UHF channels, use a UHF antenna. There are also cases when you may need a combiner to combine two or more antennas when the transmitter sites in your location are from different directions.

The next thing to check is the gain in dB of the antenna that you will need. If you are far from the transmitter sites, you will need antennas with higher gains. If you are near the transmitter sites, you will need only lower gain antennas. There is also an option to use indoor antennas when the location of the receiving TV set or set top box is very near a TV station's transmitter antenna.

If your budget will permit, select the best antenna you could afford for better signal reception and durability. Complement this with a good coaxial cable fitted with the right connectors to ensure good signal reception and excellent viewing experience.

With our field strength meters we are able to locate the source of your problems quickly.

Call 1300 700 271 to organise a service call to your place.

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"...Jack was extremely obliging, courteous and knowledgeable..."

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Customer Feedback

"...We would just like to extend our gratitude to Phil who came to us to recify a problem that had been ongoing, which another company had stuffed up. Phil was courteous, caring and checked everything fully, making sure it all worked to perfection and that we were happy with the job. I cannot recommend your service enough and wouldn't hesitate to contact you in the future should I ever need anything doing. Our most sincere thanks once again to Phil. Please let him know also that we are very happy customers...."

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