Full-duplex — A communication system that allows both parties to speak and listen at the same time. This is done by using two different frequencies to establish communication back and forth.
The most common use of this system is in telephone systems around the world. Push-To-Talk switches are not needed in this system. Repeater — A device that is installed at a fixed location and whose sole purpose is to receive a signal and then retransmit the same signal at a higher strength. Repeaters are used by institutions such as police departments and hospitals to transmit signals over a longer distance than the Two-Way Radio was previously capable of.
VOX Mode is undesirable in noisy environments. As UHF frequencies use a shorter wavelength they are generally used when working in and around buildings as the communication waves penetrate walls and steel structures best.
The UHF frequency band has more available channels, so in more populated areas UHF is less likely to have interference from other two way radios. In the country or a rural area with fewer buildings and less obstacles VHF is a better choice for communication needs. Users of VHF would be boats on the water or motorcycle riders who want to maintain contact on the road.
Use of these frequencies does not require a license, making it a very common range to use. FRS frequency waves do not travel well in populated areas and have difficulty penetrating walls and the like. Operating between The most common use of CB spectrum is short-distance, two-way communications using small, portable hand-held devices that function similar to walkie-talkies. Frequency Band — A frequency range or frequency band is a section of radio wave frequencies that are used for different purposes.
Rx — Short hand for Receiving the radio signal. Tx — Short hand for the Transmission of a radio signal. Channel Spacing — The spacing between two adjacent radio channel frequencies. Narrowband — Brought on by a F. The digital age has made shrinking the frequency range of channels a much more feasible task than it was with older analog radios. Programmable — The feature of a scanner to periodically check another channel or set of channels for a transmission, regardless of whether the scanner is un-muted on a transmission.
Priority Scan — A feature on some scanners that will periodically check other channels for a transmission, regardless of whether it is unmuted on a transmission. IP 54 — IP stands for International Protection and indicates the degree of protection for an electronic device. There are different degrees of protection indicated by the two numbers. The first number indicates the degree of protection for contact and foreign body protection and the second number indicate protection against water.
Basically, IP54 means that an electrical equipment 2 way radio in this case can be used outdoor, covering safe environments protections such as dust or water splashes.
Watt — A unit of power measured as one joule per second that is used to measure the rate of energy conversion or transfer. This is done by using a low inaudible, frequency tone that is transmitted along with a radio signal that allow the system users to ignore signals from other users.
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