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.
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gmham
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Re: DMR (TDMA) 446

Post by gmham »

Okay cheers you know your stuff !!


Just noticed some off my programmed channels have a little red and blue shield showing at top off screen what this ?
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Re: DMR (TDMA) 446

Post by Admiral »

That means they are digital, blue and red are unencrypted, blue and yellow mean encrypted.
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Re: DMR (TDMA) 446

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One day, just one day I might just know as much as you !!
so happy that I have finally got there with the programming etc mate can only thank you and the others so much for the kind patience shown - cheers
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Re: DMR (TDMA) 446

Post by Admiral »

gmham wrote:One day, just one day I might just know as much as you !!
I am as thick as they come mate, I have only been dabbling with DMR for just over a year, it's only stuff I've picked up along the way, I have no idea about the nuts and bolts of it like some, just how to use it.
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Re: DMR (TDMA) 446

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Yep okay fair enough suppose a bit longer than my xmas day onwards experience !! funny just could not get my head around it and then it clicked and I am chuffed with myself now !! the main think which impressed me is the audio on DMR , its so clear isnt it !! you noticed any day to day range increase on 446mhz with using digital as opposed to analog ?
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Re: DMR (TDMA) 446

Post by Admiral »

Obviously the main advantage of digital is that as it's 1s and 0s then the signal is either there or not there, there is that odd area where it goes 'daleky' like a GSM phone on the outer edge of a cell before passing to the next, so it doesn't taper off like analogue, the audio is just as good on the envelope edge as it is sitting next to the transmitter.

I've heard people suggest that they don't like the sound of DMR, but they obviously haven't listened to too much SSB wafting in and out.
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Re: DMR (TDMA) 446

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Okay programmed in one off the digital DMR channels on 446mhz on both radios ( 2x zastone d900 ) for some reason I can get any audio out off them. The green light will show on the receiving unit. Red light on transmitting radio,but just nothing audio wise...any ideas ?

Working fine on regular analogue 446mhz so obviously something wrong within my settings ?
Would post a screenshot off the settings but not sure how to on a windows PC ?
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Re: DMR (TDMA) 446

Post by thelad »

Print screen button?
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Re: DMR (TDMA) 446

Post by gmham »

Okay will have a look when I am home. Its windows 10 I am using.
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Re: DMR (TDMA) 446

Post by Sgfcultrajon »

Is it me or is the tyt md380g amazing 3.54 miles fc and clear as day dmr but it so hard to get used to the screen compare to a anolouge pmr but what a beast
Last edited by Sgfcultrajon on 15 Jan 2017, 19:15, edited 1 time in total.
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Re: DMR (TDMA) 446

Post by radiosification »

gmbusman wrote:Is it me or is the tyt md380 3.54 miles and clear as day dmr so hard to get used to the screen compare to a pmr but what a beast
Sorry but... what? :eh:
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Re: DMR (TDMA) 446

Post by Sgfcultrajon »

radiosification wrote:
gmbusman wrote:Is it me or is the tyt md380 3.54 miles and clear as day dmr so hard to get used to the screen compare to a pmr but what a beast
Sorry but... what? :eh:
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Re: DMR (TDMA) 446

Post by gmham »

Image

Sorry been a while getting back to you guys following me question on why my two Zastone DM900`s were not communicating with each other on 446mhz when programmed with a digital channel, as I say they will light red on tx and the other will light green when receiving signal will just not sound the audio. anyone spot the mistake ?!
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Moxon antenna for 10/20 mtrs

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Re: DMR (TDMA) 446

Post by radiosification »

Put a contact in the contact name. I don't know how you're transmitting without that, unless you're going into contacts every time.
If you're interested in digital voice, check out my YouTube channel:
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Re: DMR (TDMA) 446

Post by Admiral »

In theory you don't need a contact name if you have a defined grouplist.
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