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For example, a 150 MHz hand held may communicate to a vehicle-mounted low-power transceiver. The low-power radio repeats transmissions from the portable over the vehicle's high power mobile radio, which has a much longer range. In these systems, the hand-held works so long as it is within range of the low power mobile repeater.
Most wireless repeaters (or range extenders) are purpose-built, but certain wireless routers can be flashed with custom firmware such as DD-WRT to give them a 'range extender' option. A better option for extending wireless coverage is to configure a secondary box as a wireless access point , with a wired connection between a LAN port on this ...
In broadcast engineering, a frequency extender is an electronic device that expands the usable frequency range of POTS telephone lines. [1] It also allows high-fidelity analog audio to be sent over regular telephone lines, without the loss of lower audio frequencies . It is an extended concept of a telephone hybrid.
In April 2016, DeWalt created an Android-powered smartphone designed for building industry workers. It costs £379 ($544), is designed to survive a 2 m (6 ft 7 in) drop onto concrete, and has an operating range of −20 to 60 °C (−4 to 140 °F). [9]
The New Zealand Government's Ministry of Commerce introduced the UHF PRS in 1996 to allow for freely available short-range wireless communications outside the 26 MHz CB band. The UHF (but not VHF) band was selected due to its ability to withstand atmospheric and groundwave interference unlike the existing 26 MHz allocation.
Motorola TA288 PMR446 licence-free radio Motorola TLKR T40 radio tuned to PMR channel 1. PMR446 (Private Mobile Radio, 446 MHz) is a licence-exempt service or UHF CB in the UHF radio frequency band, as personal radio service or citizens band radio, and is available for business and personal use in most countries throughout the European Union, [1] Malaysia, [2] and Singapore.
GMRS radios are typically handheld portable (walkie-talkies) much like Family Radio Service (FRS) radios, and they share a frequency band with FRS near 462 and 467 MHz. Mobile and base station-style radios are available as well, but these are normally commercial UHF radios as often used in the public service and commercial land mobile bands ...
The VHF band is the first band at which efficient transmitting antennas are small enough that they can be mounted on vehicles and portable devices, so the band is used for two-way land mobile radio systems, such as walkie-talkies, and two way radio communication with aircraft and ships (marine radio).