Modulation is best defined as a waveform or frequency.
Why is it important:
Modulation is the method of transfer of every form of radio signal be it television, radio or internet protocol.
In Australia we use COFDM 8K (8000 carrier) spread over a 7Mhz frequency spectrum. The objective of digital is to retain the integrity of the transmitted signal.
Every television sold inside of Australia comes with a tuner suited for COFDM, so what happens when your apartment block, hotel, motel, resort, retirement village, caravan park. All these places can have problems receiving a conventional COFDM television signal. There has to be a reliable, cost effective solution.
The signal in these areas is received from a satellite transmission. In blackspot areas this signal is called VAST. Up until very recently the only way to receive this system has been to put a UEC VAST box on every television, at a cost of $279.
There is a better solution:
What is a TDT? A TDT is a transparent digital trans modulator. It converts one form of digital signal into another digital signal. It requires the ability to process the signal including all error protection protocols and digital video and sound streams to convert it into another signal. No image quality loss from down-converting to outdated composite inputs. It sounds very simple, so what’s the hitch?
Modern encryption algorithms. Why? People pay good money for a service, and they want to protect it. The owner of the broadcast specifies a CAM, a Conditional Access module. This computerised card contains the information to communicate with the TDT.
So we need a satellite signal, a CAM, a TDT, and a signal to make the system work. The TDT is then configured via a computer programme. One TDT can see one transponder at a time. VAST is spread over numerous transponders.
This will give the maximum number of Freeview/VAST services at the highest quality and most reliable throughput of every channel. With all the extra services, will your clients have the same reliance on expensive foxtel/austar services? Likely not.
Our TDTs are made from the latest in swedish technology and offer the customer the ability to feed other digital inputs be it foxtel/austar, security cameras, in house channels or foreign content.
Speak to us for a cost effective solution for your establishment.