TYT MD380 PMR PROGRAMMING

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Re: TYT MD380 PMR PROGRAMMING

Postby T2tim » Wed Nov 11, 2015 4:29 pm

yes its all very interesting isnt it. so I might have a crack with my TYT and if it ends up being a complete shambles I can always delete the group. its a bit annoying of course, cos I dont particularly want to buy another radio just for licence free digital. but I guess you can buy those cheap DPMR chinese radios which are cheaper than the approved radios, for RX only. I suspect people must have programmed them for DPMR licence free? that said Kenwood sell an approved one for around £120 which isnt much more.
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Re: TYT MD380 PMR PROGRAMMING

Postby fuzzbutton » Fri Nov 13, 2015 6:12 pm

It looks like Ofcom has decided to amend the existing Wireless Telegraphy Act 2006 licence exemption criteria for some wireless devices
Today’s proposals follow regular Ofcom reviews and are intended to reflect technical developments. In particular, the consultation proposes some minor changes to the existing exemption criteria for the following devices:
Personal Mobile Radio (PMR) 446 - liberalising the use of this band (446.0 to 446.2 MHz) by removing analogue and digital demarcations from the frequency bands

http://stakeholders.ofcom.org.uk/consul ... ons-jul15/

So presumably there will soon be 16 analogue channels, 16 DMR channels and 32dPMR channels, all sharing the same 200kHz.
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Re: TYT MD380 PMR PROGRAMMING

Postby T2tim » Sat Nov 14, 2015 9:39 pm

yes I heard something about that I will check out your link. by the way that Kenwood approved radio is £170 not £120.
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Re: TYT MD380 PMR PROGRAMMING

Postby T2tim » Fri Nov 20, 2015 11:48 pm

the 12.5khz digital licence free channels are actually DMR using TDMA and not DPMR according to Ofcom. But the 6.25khz channels are DPMR. This leads me to think you maybe able. to recieve the DMR band on the TYT 380 which also uses TDMA. Although that may depend on whether the radio has the correct vocoder which is unlikely?
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Re: TYT MD380 PMR PROGRAMMING

Postby 26PMR » Sat Nov 21, 2015 3:01 pm

You are worth programming in the DMR Tier 1 channels instead which are used for license free DMR use
https://en.wikipedia.org/wiki/PMR446

Digital TDMA[edit]
Digital DMR Tier I uses eight digital voice channels separated by 12.5 kHz from each other with 4-level FSK modulation at 3.6 kbit/s.[5]

DMR Tier I Channel Frequency (MHz)
1 446.10625
2 446.11875
3 446.13125
4 446.14375
5 446.15625
6 446.16875
7 446.18125
8 446.19375
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Re: TYT MD380 PMR PROGRAMMING

Postby radiosification » Sat Nov 21, 2015 5:53 pm

Seems like some people on this thread are getting a bit confused. On the PMR446 band currently, the first section is analog only, and the second section (446.1 to 446.2) is digital only. The digital part has 8 channels of 12.5KHz which is used with DMR or 16 channels of 6.25KHz which are used with dPMR. They occupy the same spectrum so will interfere with each other if you try to use them at the same frequency. On dPMR, there is also the standard type of dPMR radios that are made for dPMR446, such as the Kenwood TK-3401DT and the Icom IC-F4029SDR. Then there are all the chinese radios that use a different vocoder so won't be able to talk or listen to the radios from non chinese manufacturers.

It's worth putting the digital channels in for DMR but there isn't a lot of activity on either of the modes. I have heard some builders using them around London though on DMR. They were using CC1, TG1. I assume this is just the default configuration for the radios they were using, but I don't think there is any restriction on the colour code and talkgroup and you can't feasibly program in all of them, so I'd just do the default one. I think they were using the Hytera DMR Tier 1 (license free) radios which you can see on their promotional website:
http://www.dmrtier1.com/en/
If you're interested in digital radio, check out my youtube channel: http://www.youtube.com/radiosification
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Re: TYT MD380 PMR PROGRAMMING

Postby T2tim » Sat Nov 21, 2015 9:39 pm

yes I dont think many people are aware that the second digital licence free band uses a different digital standard. but as you so correctly point out they have the potential to interfere with each other. I ordered an approved radio the Midland D200 from Nevada for £130. but iam now going to cancel that because the Kenwood TK3401 you mentioned has dropped in price. ive found it for £155 not much dearer than the Midland. plus you get 16 digital channels instead of 8, and its a better radio altogether just for an extra £25. I want to wait for my refund from Nevada though first. I just hope I can stop the delivery in time. I have emailed them and left a message on their answerphone but forgot they dont work saturday. iam going to try and ring them first thing monday morning does anyone know what courier they use? although it might vary I guess.
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Re: TYT MD380 PMR PROGRAMMING

Postby G4RMT » Sun Nov 22, 2015 9:40 am

Don't sign for the parcel, and then the return won't cost you - which it will if you accept it, then return it.
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Re: TYT MD380 PMR PROGRAMMING

Postby T2tim » Sun Nov 22, 2015 5:14 pm

Will do thanks for that tip it will be useful in the future even if I may not have to do it this time. Fortunately ive managed to get in contact with them on Facebook since so they are now aware
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Re: TYT MD380 PMR PROGRAMMING

Postby G4RMT » Sun Nov 22, 2015 8:25 pm

Just as an aside, I've just had a MD380 delivered to me here in Belfast, and the programming cable is in Suffolk! As it comes it has 15 digital channels set up and one analogue. The most odd range of channels too - some in the business radio channels, some in the old Police allocation and one bang in the middle of the pager allocation. If people buy a couple of the things, and just turn them on, just think of the consequences and you'd be totally ignorant!
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