[Allstar Digital] MMDVM Lessons learned so far.

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Since DMR uses a wide band channel to 2 the 2 slots, therefore you will 
need a radio that does wide band (5khz/25 khz).

Other C4FM modulation schemes use narrow band like P25 and (Con)fusion.
RQ

On 1/9/2016 5:57 PM, Steve Zingman wrote:
> We have not narrowed that down yet. We are Using Tait T2xxx radios. 
> One of the things we need to try is both the wide and narrow setting. 
> We have not et even confirmed that 3.88 is optimal.
>
> On 01/09/2016 05:52 PM, Corey Dean wrote:
>> So I am assuming a wide band transmitter instead of narrow?
>>
>> Sent from my iPhone
>>
>>> On Jan 9, 2016, at 5:47 PM, Steve Zingman <szingman at msgstor.com> wrote:
>>>
>>> Mike and I have been working with the MMDVM and the Home Brew 
>>> Repeater code for a couple of weeks.
>>> It's very early in the process and I think that unless you like to 
>>> try to hit at least 3 moving targets, I suggest people wait. The 
>>> MMDVM is a  Arduino  Due and a small analog board. The modem 
>>> firmware runs on the Due. The analog board does some filtering and 
>>> level control. We are running a early prototype board from Jim 
>>> KI6ZUM. Jim has some new boards in the works, so right now waiting 
>>> or build your own is the only choice.
>>>
>>> The software is early and buggy, as any new software is. Jonathan 
>>> G4KLX has done a phenomenal job so far and it only will get better. 
>>> The test software ONLY works in duplex mode, which is a problem 
>>> because if your transmit data is not right, you will not get too far 
>>> with receive. Kind of a catch 22. Jonathan G4KLX says that the 
>>> deviation should be 3.88 KHz. So on my IFR 1200S that works out to a 
>>> hair under 4KHz. (analog meter). Now that we have the transmit 
>>> working OK, not great but OK, we will start on receiver.
>>>
>>> More to follow.
>>>
>>> For INAD, Steve N4IRS
>>> -- 
>>> "Anything is possible if you don't know what you are talking about."
>>> 1st Law of Logic
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>