They may also have connections to the public switched telephone network or a satellite network (BGAN, INMARSAT, MSAT) as a backup route from the source to the destination.įrequently Asked Questions 1.Radio repeaters may also translate one set of radio frequencies to another, allowing two distinct public service organizations to communicate with one another (say, police and fire services of a city or neighboring police departments).Without them, the range of these systems is limited due to the curvature of the Earth and the blocking impact of terrain or tall structures. Radio repeaters increase coverage in systems that use frequencies that propagate in a line-of-sight manner.Several specific applications for radio repeaters are: In addition, they are often utilized in big locations, such as a warehouse or hotel, when the structure of the building makes it difficult to cover. What is the Function of a Radio RepeaterĬommercial enterprises that operate across vast or congested regions, emergency services, public transportation, and amateur radio hobbyists employ radio repeater networks. Some repeaters employ two separate frequency bands for input and output isolation or convenience. The repeater must transmit simultaneously as the signal is received and may even utilize the same antenna for both sending and receiving. And the work may be accomplished via cables, a radio link, a phone connection, or even digital audio technology through the Internet.Īdditionally, frequency-selective filters are necessary to prevent the receiver from being overwhelmed by the broadcast signal. Repeaters are occasionally connected to increase the transmission range. Thus, a repeater may expand a low-power handheld radio’s effective communication range to dozens, if not hundreds, of kilometers. While mobile stations use radio repeaters, the repeater station’s frequency must differ from the transmission frequency.Ī repeater is generally placed on top of a tall structure or a mountain, and it is fitted with a powerful antenna system that allows it to collect weak signals and transmit across a large area. There are two radio frequencies that the radio repeater system needs to use. This means that if you use two-way radios with a radio repeater service, they will be configured to receive on the repeater’s input frequency and transmit on the repeater’s output frequency. When a receiver receives a signal, the controller activates the transmitter, which then retransmits the signal. A radio station consists of a receiver tuned to one frequency as the “input” and a transmitter tuned to a different frequency as the “output,” both of which are connected via a controller device. If a radio repeater wants to work, it’ll need a radio station. Also, because radio waves can be reflected or bounced off objects, the straight path between radios isn’t necessarily that straight. For example, although these frequencies travel along “line-of-sight” pathways, radio signals may pass through various non-metallic objects and be picked up through walls or other obstacles.Įven though we can’t see between transmitter and receiver antennas, the radios consider this line-of-sight. However, there are still exceptions to the general rules. Radio waves in these frequencies, unlike AM radio waves, travel in straight lines and, in general, cannot go beyond the horizon or behind solid objects. The frequency range of a repeaters radio available for purchase is typically 150MHz to 900MHz. This lets radio users communicate when obstacles or distance are an issue. A radio repeater (or a mobile radio repeater) receives a radio signal and retransmits it at a higher power level, allowing it to travel longer distances. All About a Radio RepeaterĪs mentioned above, a radio repeater helps extend the range of a portable or mobile radio system. Repeaters are used in professional, commercial, and government mobile radio systems and amateur radio. What is a two way radio with a repeater service?Ī radio repeater is an electronic device that combines a radio receiver and a radio transmitter to receive a signal and retransmit it over a greater distance, allowing two-way radio communications to go further.Ī repeater at a high elevation can connect two mobile stations that would otherwise be out of each other’s line-of-sight propagation range. What is the Function of a Radio Repeater.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |