what is a 2 meter mobile radio?
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The 2-meter amateur radio band is a portion of the VHF radio spectrum, comprising frequencies stretching from 144 MHz to 148 MHz in International Telecommunication Union region (ITU) Regions 2 (North and South America plus Hawaii) and 3 (Asia and Oceania) and from 144 MHz to 146 MHz in ITU Region 1 (Europe, Africa, and ...
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The micron is a standard measurement of length in the metric system that's the equivalent of one-millionth of a meter. Gsm stands for “grams per square meter.” When used in the context of measuring the weight of paper it is also referred to as “grammage.” It is the equivalent of 0.001 kilograms per square meter.
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The lowest frequency portion of the electromagnetic spectrum is designated as “radio,” generally considered to have wavelengths within 1 millimeter to 100 kilometers or frequencies within 300 GHz to 3 kHz.
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This radio can be programmed to receive on any frequency in the typical VHF/UHF land mobile bands. It cannot be used legally used to transmit on either FRS or GMRS frequencies because the radio is not Part 95 certified. There are no frequencies in this radio that can legally be used without a license.
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FM radio uses frequency modulation, of course. The frequency band for FM radio is about 88 to 108 MHz. The information signal is music and voice which falls in the audio spectrum.
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A millimeter (abbreviated as mm and sometimes spelled as millimetre) is a small unit of displacement (length/distance) in the metric system. Millimeters are used to measure very small but visible-scale distances and lengths. The metric system is based on decimals, there are 10mm in a centimeter and 1000mm in a meter.
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Broadcast transmitters for AM, FM and Television use frequencies below 1000 MHz, Wi-Fi uses two bands at higher frequencies - 2.4 and 5GHz. Cellular phones use many different frequencies. Television: Many frequencies from 470MHz to 800MHz, and others.
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Medium wave (MW) is the part of the medium frequency (MF) radio band used mainly for AM radio broadcasting. The spectrum provides about 120 channels with limited sound quality. ... MW was the main radio band for broadcasting from the beginnings in the 1920s into the 1950s until FM with a better sound quality took over.
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The 700 MHz frequency band consists of radio spectrum in the range 694-790 MHz. It is part of the wider ultra-high frequency (UHF) band, currently used throughout Europe for terrestrial broadcasting.
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Two basic technologies in mobile phones, CDMA and GSM, represent a gap you can't cross. ... CDMA (Code Division Multiple Access) and GSM (Global System for Mobiles) are shorthand for two older radio systems (2G and 3G) used in cell phones.
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2G - Second Generation The main difference between the two mobile telephone systems (1G and 2G), is that the radio signals used by 1G network are analog, while 2G networks are digital . Main motive of this generation was to provide secure and reliable communication channel. It implemented the concept of CDMA and GSM .
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The "2.4G" and "5G" numbers in Wi-Fi are radio frequency bands. 2.4G is short for the 2.4GHz band, and 5G is short for the 5GHz band (roughly 5.1 to 5.8 GHz, with some gaps in between depending on the country and regulator agency).
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In the most basic form, a cell phone is essentially a two-way radio, consisting of a radio transmitter and a radio receiver. When you chat with your friend on your cell phone, your phone converts your voice into an electrical signal, which is then transmitted via radio waves to the nearest cell tower.
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However, 2G is still relied on by the elderly, users in rural locations and numerous machine-to-machine (M2M) applications such as smart meters, the UK Spectrum Policy Forum by Real Wireless noted in its report. ... At present there is still a significant volume of non-VoLTE-enabled 4G devices relying on 2G/3G for voice."
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Very high frequency is commonly used for FM radio broadcast, two-way land mobile radio systems, long-range data communication, and marine communications, just to name a few. VHF includes radio waves from 30 MHz to 300 MHz. ... The highest low band VHF is 88-108 MHz and operates the commercial FM radiobroadcast band.
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The different types of mobile communication systems are a mobile two-way radio, public land radio, mobile telephone and amateur (HAM) radio. Mobile two-way radios are one-to-many communication systems that operate in half-duplex mode, i.e., push to talk.
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Like the FRS, GMRS uses FM rather than AM waves to send signals, but unlike the FRS, GMRS can use up to 50 watts of power. ... Their range is a bit better than FRS radios, with typical hand-held devices being somewhere in the 1-2 mile window. Some mobile units with higher antennas can have a range up to 5 miles.