The Sky Tower is a telecommunications and observation tower in Auckland, New Zealand. Located at the corner of Victoria and Federal Streets within the city's CBD, it is 328 metres (1,076 ft) tall, as measured from ground level to the top of the mast, making it the tallest freestanding structure in the Southern Hemisphere and the 25th tallest tower in the world.
It has become an iconic landmark in Auckland's skyline due to its height and unique design.
The tower is part of the SkyCity Auckland casino complex, originally built in 1994–1997 for Harrah's Entertainment. Several upper levels are accessible to the public, attracting an average of 1,150 visitors per day (over 415,000 per year).
The tower is also used for telecommunications and broadcasting with the Auckland Peering Exchange (APE) being located on Level 48. The aerial at the top of the tower hosts the largest FM combiner in the world which combines with 58 wireless microwave links located above the top restaurant to provide a number of services. These include television, wireless internet, RT, and weather measurement services.
(Frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. The term and technology is used in both telecommunications and signal processing).
According to en.wikipedia