PMR446 (Private Mobile Radio, 446 MHz) - Under Construction !!
(“Hover” mouse over any links for more information…)
”PMR446 (Private Mobile Radio, 446 MHz) is a licence exempt service in the UHF radio frequency band and is available for business and personal use in most countries…“
“Historically, analogue FM is used but a digital voice mode has been available in radios conforming to digital private mobile radio (dPMR446) and digital mobile radio (DMR Tier 1) standards designed by ETSI”
“Originally 8 channels were available in analogue mode but this has now been increased to 16 channels. Typically PMR446 is used for both recreational and business use, additionally it is being utilised by amateur-radio operators and radio enthusiasts as a license-free experimental band“
Source for all the above: Wikipedia
Channel/Frequency Allocations - Analogue & DMR
Simplex DMR on PMR446 Channels !!
Channel/Frequency Allocations - Digital FDMA (dPMR446)
Digital FDMA (dPMR446)
“dPMR446 radios are licence-free products for use in the 446.0–446.2 MHz band within Europe
These are fully digital versions of PMR446 radios”
“dPMR446 radios comply with the ETSI TS 102 490 open standard and are limited to 500 mW RF power with fixed antennas per ECC Decision (05)12. They are ideally suited to recreational and professional users who do not need wide area coverage with base stations and repeaters. dPMR446 equipment is capable of voice, data and voice+data modes of operation”
“This means that dPMR446 can provide voice calls, text messaging (SMS), status and embedded data such as GPS position etc”
Source: Wikipedia - dPMR 446
Boy, are these channel allocations confusing or what?
So I have combined the two channel allocations together and it now makes sense ! (to me !)
About Band Edges, Channel Offsets & Frequency Listings
A lot of folk wonder why “Channel Offsets” are employed, and why this is done in association with “Band Edges”