The difference between UHF, ultra-high frequency, and VHF, very high frequency, is that the frequencies used in UHF are much higher than those in VHF. Both, however, are relatively high frequencies for radio waves as the names imply. Signals sent via VHF are less directional and travel further than UHF signals, making them preferable for their typical purpose of broadcasting television.Continue Reading
Both UHF and VHF broadcasting are declining in use as television is increasingly received through cable and satellite services; however, several channels in each are still designated by the government for use. While VHF signals have a greater range and ability to broadcast through or around physical obstacles, UHF signals are more resistant to common types of electromagnetic interference.
Receivers and transmitters of UHF signals tend to be more expensive than those for VHF receivers, as dealing with the higher frequencies requires more specialized equipment. UHF antennas are often more compact than VHF antennas, making them preferable in some situations. Because of their reduced range, UHF systems often require substantially more power to work properly.
While UHF has many disadvantages, it is often preferable when transmitting from an urban environment. These environments have an abundance of electromagnetic interference sources that are minimized with UHF signals.Learn more about Television & Video
To receive free digital television signals, install an antenna that receives both VHF and UHV channels, and if watching a television made before 2007, plug in a converter box to change the digital signal to analog. Different antenna styles are suitable for areas receiving strong or weak signals.Full Answer >
As of December 2015, the frequencies used by Astra satellites include 10714.25 Hertz for the Astra 2E, 11307.00 Hertz for the Astra 2F, and 10964.00 Hertz for the Astra 2G. The Astra 2E, 2F and 2G are the second generation of Astra communications satellites launched by the satellite operator SES.Full Answer >
Common satellite frequencies for use with satellite television providers are a part of the KU band, which ranges from 12 to 18 gigahertz. In particular, these providers use the direct broadcast satellite bands between 12.2 and 12.7 gigahertz. Both Dish Network and Direct TV use the DBS frequencies. With the addition of high-definition signals, satellite companies must provide additional data in their feeds, so they are turning to higher frequencies in the KA band, between 18.3 and 20.2 gigahertz.Full Answer >
The Hot Bird channel frequencies are the frequencies at which the Hot Bird satellites broadcasts free to air and encrypted digital television and radio stations and packages to various countries. For example, Hot Bird 13B transmits a package of Polish stations over frequency 12.188 (V) and sends stations from San Marino, Israel, Bahrain and Iran over frequency 12.149 (V).Full Answer >