You probably see variety of aerials on roofs but have no idea what they are there for. Here is a quick guide to the most common ones.
These are some of the first aerials ever installed. Obsolete now and if you still have one on your roof it must be so old that it will not be long before a wind brings it down! It’s not picking up any frequencies anyway. Contact us to bring it down for security reason before some parts are felling off your house. We do not have these aerials in New Zealand.
Analog TV Aerial
This is was the most commonly installed aerial of the 80’s and 90’s. Designed for analog TV it is not technically compatible with digital reception, for Aucklanders the time is September 2013. Freeview is going fully digital next year and good news is that Freeview HD is only available via UHF TV aerials. Many of the Auckland house still keep the old VHF after the 2013 digital switch. We suggest you to remove them, or hire us to remove them as sooner as possible. The cost is $135 to do the remove and sort out cabling, same price as TV signal repair job.
Digital TV Aerial
This type is the most commonly installed aerials of today in Auckland. They come in various shapes, color and sizes, depending on different branding and performances, for different installation locations, consult us free for your ideal reception aerial type. They look like the following photos.
Why there are both VHF and UHF on my roof?
Please find the answers in our explanation. It’s about analog to digital switch progress, from year 2011 to 2013.
DAB Radio Aerial
This aerial receives digital radio signals and comes as a 5 element or Omni version. These aerials are aligned vertically. DAB is Digital Audio Broadcasting, some radio stations of Auckland and New Zealand national are available in DAB format
BB Grid TV Aerial
This aerial was designed to eliminate ghosting only when the signal is reflected from an obstacle directly behind the aerial. If you house has no ideal direction facing the aerial transmission point, but luckily on the opposite site there’s a high building, signal could be collected by it’s reflection, complicated, right? It’s not a regular item in Auckland.
FM Radio Aerial
These aerials come in 3, 4, 5 and 8 element versions. Designed for receiving analog radio reception there is also an Omni version which looks like a ring. We do FM antenna installation at $185
There are many different shapes and sizes of UHF aerials. Here are a few different types available for different situation uses:
1. This is the most common type used in Auckland for Freeview HD.
2. Flat aerial, for strong and medium signal area only.
3. Network aerial, for signal reflection. If you location is happen to be in the opposite direction of signal transmitter, we can use this type of reflection signal collection aerial to receive signal. There has to be a building in the opposite way to help. It’s very rare in Auckland.
UHF means “Ultra-high frequency”. It’s range of electromagnetic waves are between 300 MHz and 3 GHz (3,000 MHz). It is also known as the decimetre band or decimetre wave as the wavelengths range from one to ten decimetres (10 cm to 1 metre).
Lower frequency signals fall into the VHF (very high frequency) or lower bands.
The main advantage of UHF transmission is the physically short wave that is produced by the high frequency. The size of transmission and reception antennas is related to the size of the radio wave. The UHF antenna is stubby and short. Smaller and less conspicuous antennas can be used with higher frequency bands.