What is QAM tuner?
The abbreviation for modulation of quadrature amplitude is QAM by the method of transmitting digital cable signals. To receive these signals, the TUNER QAM is required. QAM tuners can be internal or external, but since the end of 2000, most have been placed in TV ensembles, especially on high -resolution televisions (HDTV). As a result, the Qam tuner can allow viewers to receive unscramble digital cable television without requiring a set-top converter or box.
and QAM Tuner works automatically to receive and decoding signals when the user connects to the TV file. The sets with this type of tuner do not need an external digital or analog decoder for receiving and decoding signals. However, if the digital cable is encrypted, as if it were often in the case of premium cable channels, an external box or converter may still be required.
When a digital cable signal reaches TV, the QAM tuner is a tool used to decrypt or decodingsignals and creates a picture on a television. The tuner has a card that converts digital signals sent by a cable into a format that can be processed by television. In many cases it is automatic, but in some cases the tuner must be tuned to receive and decode the signals correctly. Operating instructions to tune the Qam tuner are usually provided by new TVs and the image optimization is generally a relatively simple process.
Digital cable channels consist of two numbers: one main or physical channel and one smaller or subchannel. This means that digital television viewers can watch channel 5.1 or 5.2 instead of having only channel 5. Some cable systems avoid this by mapping digital palsy on "virtual" channels; This method can be channel 5.2 on channel 728 to make it easier for the viewer to find and remember.
It is important to realize that whileAll QAM tuners receive digital cable signals, these signals do not necessarily have to be in high resolution (HD). Although all broadcasting in the US and many broadcasts in other countries transmit their programming in digital format, in most cases it is not necessary for these signals to be in high definition. Due to demand, however, more and more HD programming is available.
digital television signals that are transmitted by air (OTA) cannot be read using QAM tuner; This type of tuner is used only for receiving and modulating digital cable signals. In order to pick up OTA digital TV signals, the TUNER ATSC must have the TV. In the US, all new TVs are legally obliged to have a Tuner ATSC.