DMR (TDMA) 446

Licence free two-way radio services that now includes both FM and digital channels. Discuss models, modifications and other similar worldwide standards such as FRS and GMRS.
pete_uk
Radio Addict
Radio Addict
Posts: 655
Joined: 16 Jun 2008, 11:52
Location: Stroud, Gloucestershire

DMR (TDMA) 446

Post by pete_uk »

Whats the consensus on 'DMR 446' settings?

I went to program my Hytera PD785 (as used on the BBT TV series Red Rock!) when I suddenly realised I couldn't leave the colour code blank like the CTCSS on analogue 446. Are these things set with a default? They need to talk to each other so it can't be that different surly??
User avatar
bigbloke
Top Poster
Top Poster
Posts: 1449
Joined: 25 Aug 2008, 17:53
Location: Nominally Newport (South Wales) but potentially "anywhere"
Contact:

Re: DMR (TDMA) 446

Post by bigbloke »

sadly there is no consensus - as far as I know theres only three of us using it. :-)

I have left a scan running for eight weeks on 446.1-446.200 into a high gain antenna and preamp,
with all logging to disk.

total DMR hits other than my own were nil ! and my location covers a good 50-70 radial miles.

Still quite a few analogue licences active in the band and a good few people using analogue
for "private nets" of an evening.

beyond that i found a couple of people over bristol way using P25 on there but thats it

regards

BB
User avatar
bigbloke
Top Poster
Top Poster
Posts: 1449
Joined: 25 Aug 2008, 17:53
Location: Nominally Newport (South Wales) but potentially "anywhere"
Contact:

Re: DMR (TDMA) 446

Post by bigbloke »

somewhere there was another thread on here where we tried to kick of a consensus - but no one could agree so the thread went cold
User avatar
radiosification
Top Poster
Top Poster
Posts: 2495
Joined: 27 Dec 2010, 23:52
Location: London
Contact:

Re: DMR (TDMA) 446

Post by radiosification »

Personally I use a colour code of 1, because that's what all the other users in my area use. I think it's a bit like how channel 1 on normal PMR446 seems to get used more, because it's just the first channel there when you turn the radio on for the first time usually. And with colour codes, usually 1 is already there in the box when you create a new channel.
If you're interested in digital voice, check out my YouTube channel:
http://www.youtube.com/radiosification
User avatar
bigbloke
Top Poster
Top Poster
Posts: 1449
Joined: 25 Aug 2008, 17:53
Location: Nominally Newport (South Wales) but potentially "anywhere"
Contact:

Re: DMR (TDMA) 446

Post by bigbloke »

conversely - I would not choose an out of the box setting as it will be full of kids, muppets, bike schools and crane banksmen - if analogue 1:00 and 1:01
are anything to go by
User avatar
owza
Super Member
Super Member
Posts: 337
Joined: 16 May 2011, 10:26
Call Sign: M0
Location: NW, UK

Re: DMR (TDMA) 446

Post by owza »

Colour code 1 is the default for ham DMR simplex as well.
handyguy2002
Super Member
Super Member
Posts: 425
Joined: 20 Mar 2011, 20:01
Location: near newcastle

Re: DMR (TDMA) 446

Post by handyguy2002 »

I think we all need to have a vote to find out the best option then go from there. After all we have a channel for transmission group operating on channel 8 code 8 . 8th of every month maybe we could do that for digital
Binatone 950
QuanSheng TG-UV2
TYT 380 + TYT 9600
Kirisun S780
Uniden +BCT15x + BCD396t +BCD536 hp
HYTERA PD505
WHISTLER TRX2
User avatar
bigbloke
Top Poster
Top Poster
Posts: 1449
Joined: 25 Aug 2008, 17:53
Location: Nominally Newport (South Wales) but potentially "anywhere"
Contact:

Re: DMR (TDMA) 446

Post by bigbloke »

Well if were of a mind to comply with european groups the decision is made for us it seems:

http://dmr446.hamstation.eu/index_en.htm

makes it easier ?

regards

BB
User avatar
AshtonMobileScanner
Super Member
Super Member
Posts: 492
Joined: 25 Oct 2011, 12:49
Call Sign: 26TM931
Location: Dukinfield, Tameside

Re: DMR (TDMA) 446

Post by AshtonMobileScanner »

I use CC1 G1 S1

Motorola UHF DP3600,
Golden One 1907,
Baofeng UV5RA+,
Diamond RH771 Antenna,
UHF Stubby Antenna,
Diamond X-30 Antenna,
MASS SPS 250 MK2.

(Monitor All Channels)
CALLSIGN: 26 TM 931 / 26 CT 931
User avatar
gmham
Top Poster
Top Poster
Posts: 2260
Joined: 13 Aug 2009, 11:27
Call Sign: 108TM154

Re: DMR (TDMA) 446

Post by gmham »

Going to give 446mhz digital a try, could someone advise me the latest legal 446mhz dmr freqs ? also belive officially the 446mhz digital uses a slightly different system can we programe our tyt / zastone D900 radios with this particular requirment ?
Yaesu FTDX10
Kenwood TS711e
Anytone D578UV Pro+

Moxon antenna for 10/20 mtrs

——
John - 108TM154 / 108CO154
User avatar
Admiral
Legend
Legend
Posts: 10108
Joined: 08 Mar 2011, 21:20
Call Sign: 26TM157
Location: MK-UK

Re: DMR (TDMA) 446

Post by Admiral »

DMR.PNG
Just a note, obvisously the equipment you quote is not legal for this band, but hey, I doubt you'll find too much activity, but it's fun if you have some like minded mates, and a good opportunity to dabble with encryption too ;)

Just make sure you don't use your ham RID (that's why I have two radios) :lol:
You do not have the required permissions to view the files attached to this post.
Winner of the 2017 IBTL 'Summer Sizzler' competition
User avatar
gmham
Top Poster
Top Poster
Posts: 2260
Joined: 13 Aug 2009, 11:27
Call Sign: 108TM154

Re: DMR (TDMA) 446

Post by gmham »

Yep thanks ! Not got a DMR ID set up anyway so okay there ! Appreciate that the radio is not legal for this particular band but not sure if that's purely down to the output power or if the DMR type system used is not used on our radios ?

You mention encryption which I am sure you advised before is just another layer off security from non encrypted DMR signals to casual listeners as in my view DMR although becoming more popular is still relatively rare for listeners especially on 446 MHz ! So encrypted DMR on 446 MHz would be virtually impossible to be listened into ?
Yaesu FTDX10
Kenwood TS711e
Anytone D578UV Pro+

Moxon antenna for 10/20 mtrs

——
John - 108TM154 / 108CO154
User avatar
Admiral
Legend
Legend
Posts: 10108
Joined: 08 Mar 2011, 21:20
Call Sign: 26TM157
Location: MK-UK

Re: DMR (TDMA) 446

Post by Admiral »

gmham wrote:So encrypted DMR on 446 MHz would be virtually impossible to be listened into ?
It's virtually impossible to listen in on fully encrypted DMR on any band, GCHQ wouldn't be able to earwig without the keys.
Winner of the 2017 IBTL 'Summer Sizzler' competition
User avatar
gmham
Top Poster
Top Poster
Posts: 2260
Joined: 13 Aug 2009, 11:27
Call Sign: 108TM154

Re: DMR (TDMA) 446

Post by gmham »

Okay thanks interesting to know !
so just set it to the above 446mhz dmr freqs, use CC1 G1 S1 or whatever and I see under privacy which I take it is this encryption mode there is none / basic and advanced strange you would think you either wanted none or advanced not sure where basic would come in ?

Just noticed some off my programmed channels have a little red and blue shield showing at top off screen what this ?
Last edited by gmham on 02 Jan 2017, 12:45, edited 1 time in total.
Yaesu FTDX10
Kenwood TS711e
Anytone D578UV Pro+

Moxon antenna for 10/20 mtrs

——
John - 108TM154 / 108CO154
User avatar
Admiral
Legend
Legend
Posts: 10108
Joined: 08 Mar 2011, 21:20
Call Sign: 26TM157
Location: MK-UK

Re: DMR (TDMA) 446

Post by Admiral »

Basic are a series of 16bit defaults that the world and his dog know, enhanced means you can set your own personalised 128bit encryption that is almost as good as it gets.
Winner of the 2017 IBTL 'Summer Sizzler' competition
Post Reply