What is the difference between channel & frequency & band in RF?
2015年11月30日 · A channel is a generally accepted stopping point - somewhere that we know other people or devices will be listening. For example, in the United States, amateurs get access to 5 distinct channels on the 5 MHz band. Or your WiFi router uses several channels, but most of those channels overlap. A frequency band is a range of frequencies.
united states - Amateur Radio Stack Exchange
The radio is allowed to transmit on that frequency (CB, FRS, MURS). The transmissions are very low-power ("Part 15": WiFi, Bluetooth, lots of other things). You do not have an amateur or other radio license, the radio is not approved for a specific service that works that way, and it does not meet Part 15 restrictions.
How do I legally use a Baofeng UV-5R radio for communication?
2018年9月8日 · The radio is allowed to transmit on that frequency (CB, FRS, MURS). The transmissions are very low-power ("Part 15": WiFi, Bluetooth, lots of other things). Your radio is not very low-power. Your radio does not meet the requirements of CB or similar services, most significantly that it not be able to transmit other than on the relevant ...
2m frequency allocation for channels - Amateur Radio Stack …
As 2m became wildly popular, all the channels became occupied and started interfering with each other, so the community opted to use a "split channel" (i.e. 15kHz) with an inverse offset (below 147, repeater input was the higher frequency). But then some of the stronger repeaters got into the inputs of other repeaters in the next 15kHz.
What frequencies should I listen to for packet radio?
2014年11月5日 · The Colorado Council of Amateur Radio Clubs (CCARC) 2 Meter Frequency Use Plan states that 144.900 - 145.100 MHZ should be used for Packet communications. 144.390 MHZ is also used Nationwide for APRS. Colorado Council of Amateur Radio Clubs (CCARC) 2 Meter Frequency Use Plan - 144.000 through 148.000 MHz. Frequency (MHz) Usage. 144.000 - …
Can a Baofeng UV-5R+ be used on FRS, GMRS, and MURS?
2017年12月1日 · The five MURS frequencies are listed below, The 154 MHz channels can be operated on the standard 25 kHz wide band or narrow band mode. The 151 MHz channels can only be operated in narrow band mode. 151.820 MHz; 151.880 MHz; 151.940 MHz; 154.570 MHz; 154.600 MHz; Each of the five frequencies can not only transmit voice, but also data.
ht - How can I manually programme these FRS channels onto my …
2019年10月16日 · First, the FRS channels have some odd channel spacing that I can't figure out. For example, one of them is 462.5625. So, I'm guessing I need to set the frequency step (menu 1) and set it to 6.25 kHz (option 2), or enter 462.500, and press up arrow? Meanwhile, the last column says TStep, which is set to 5 on all frequencies.
What is a 'Call' Channel? - Amateur Radio Stack Exchange
2021年2月28日 · The calling frequency is also part of the wilderness protocol, which can be used for emergency call outs. So if you are using the calling frequency, by this protocol you are suppose to listen for the first 5 minutes of each hour in case someone is calling for help and not resume normal use sooner than 4 minutes after the hour.
How many frequency channels are there in a frequency band?
In amateur radio practice, the shorthand name for a band usually refers to its approximate wavelength in meters rather than the frequency, for historical reasons; for instance, the "20m band" in the US ranges from 14 – 14.350 MHz. A channel is also a frequency range, which is usually defined by law, regulation, or general practice.
What Frequencies Are Open To People Without A License?
2020年1月8日 · With appropriate equipment (which does not include a ham rig) a non-licensed person in the USA is allowed to transmit in frequency bands which are "licensed by type" -- this includes CB channels 1 to 40, AM or SSB, Family Radio Bands (aka FMRS), and unlicensed business bands (GMR), but only with type certified equipment specific to each band.
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