[Allstar Digital] MMDVM Lessons learned so far.

[Steve Zingman]

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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