Because the begin of Tv in the late 1920’s the consumer has selected the channel to look at by choosing a quantity on the Television this sort of as channels two to thirteen for VHF and 14 to 69 for UHF. With the advent of cable Tv set this has modified somewhat with channel possibilities from two to about ninety nine. The common client has become extremely comfy with this program.

When the market commenced growth of digital Television and compression they had to build a new program. The regular that was produced was recognized by the Advanced Television Specifications Committee (ATSC).

Due to the fact electronic compressed Television is now able of transmitting much more than one particular program on a Tv channel it was determined to give the software a Key channel quantity and a Small channel quantity divided by a period of time (.).

For instance a digital plan that is carried on VHF channel six would be called six.one. If there was a 2nd or third program getting transmitted they would be known as 6.2 or six.three. If istar a9000 code were transmitted on a UHF channel they would be 45.1, forty five.three and 45.7. To make things even a lot more complicated the FCC mandated that Television set stations being transmitted on Channels 2-6 shift to yet another frequency. This typically resulted in a channel that was acknowledged for fifty years as Channel three to be transmitted on UHF channel 26 but called three.1… Extremely perplexing indeed.

When these applications have been picked up by the regional cable company it tended to get even much more puzzling until the Virtual channel numbering method was released. This is due to the fact on a cable technique, there can have as several as ten or twelve programs carried on one particular channel and the channel could be irrelevant to the software variety or standard channel number.

With the introduction of a digital channel amount system a variety is assigned to a Program irrespective of the place the channel is in fact carried on the system. This implies the amount displayed on the Tv set or Cable box will be between 2 and 999 and will not have any duplicates and no minimal numbers this sort of as a.one or.2. The system operator can assign any virtual number.

For occasion, when we appear at channel three talked about earlier mentioned it is transmitted by the broadcaster on UHF channel 26. The cable organization might spot it on the cable on channel fifty seven.three but they have established it on virtual channel number 3. This way when you choose channel three on your cable box, the aged channel 3 you viewed for years is what you get.