[arm-allstar] DRA818V VHF Band Voice Transceiver Module and DRA818U UHF Band Voice Transceiver Module

[David McGough]

Hi Chris & Everyone!

First, Happy Thanksgiving!

Has anyone out there taken a look at the transmitted spectrum from either
of these modules to confirm they meet FCC specs??? As small as they are, I
can't imagine there is any low-pass filtering, etc., that is part of the 
module.

...Just wondering!

73, David KB4FXC




On Tue, 25 Nov 2014, Christopher Kovacs wrote:

> Hi Steve,
> 
> I am currently working an a proof of concept Allstar node using this Dorji
> Module.  I just got the module on the air as Allstar node 29061.  I used a
> modified FOB and the DRA818U module.  The module works well and has nice
> audio and running 500mw.
> 
> I did have issues programming the device.  Any commands sent were responded
> by an error command.  I found an Arduino  Library that I thought I would
> try to help determine the root cause and see how someone else programmed
> the module.  It also gave the same results and I was afraid that the module
> may be bad.  I added a CONNECT command to the library to see how that would
> respond.  After adding the "AT+DMOCONNECT\r\n" command prior to other
> commands, it work as it should, not it's not clear why.
> 
> I am currently using the Arduino Mino Pro 3.3V to set the module settings
> and it's seems to be working just fine.  I plan to use the Arduino as a
> simple interface to program and setup the module. Ultimately, I would like
> to use the BBB UART modules, but the current kernel does not support the
> cape manager and the addiontal UART modules are not part of the overlays.
> 
> Here is a pointer to my project notes and an image of the current project:
> 
> 
> http://www.w0anm.com/dokuwiki/doku.php?id=allstar:allstar_nano_node_project
> 
> I still need to complete the 3.3V power supply and complete the
> documentation.
> 
> Thank you for adding the URL docs to your email. I have not see some of the
> app notes so it may give me an insight to why I had issues.
> 
> 
> 
> 73,  Chris, w0anm
> 
> (Allstar node 29061, 29062)
> 
> 
> 
> 
> On Tue, Nov 25, 2014 at 1:18 PM, ssedgwick <ssedgwick at suddenlink.net> wrote:
> 
> >   I saw these VHF and UHF voice transceivers modules talked about on
> > another VOIP Yahoo group a couple weeks ago.  After looking at the specs, I
> > see they are based on the RFIC RDA1846 transceiver IC chip.  Looks like a
> > way to make a nice portable hot spot when tied to the BBB and the fine work
> > Doug and others have done with Allstar.  I’m not a programmer, but I wonder
> > if it would be possible to interface these modules to a BBB and be able to
> > program the RF freuqency, PL, DPL, etc using touchtone commands, or if
> > that’s not possible to program via ssh?
> >
> > Here’s a couple links to DRA818 modules and also ebay listings for both
> > the VHF and UHF models.
> >
> > http://www.dorji.com/docs/data/DRA818U.pdf
> >
> > http://dorji.com/docs/data/DRA818V.pdf
> >
> > http://dorji.com/docs/app/ADW1003_DRA808M.pdf
> >
> >
> > http://dorji.com/docs/app/ADW1011_configure_DRA818V_DRA818U_through_computer.pdf
> >
> > http://dorji.com/docs/app/ADW1004_DRA808M.pdf
> >
> > http://www.ebay.com/itm/191243649892
> >
> > http://www.ebay.com/itm/191210888951
> >
> > 73,
> > Steve_WB8GRS
> >
> > _______________________________________________
> >
> > arm-allstar mailing list
> > arm-allstar at hamvoip.org
> > http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
> >
> > Visit the BBB web page -
> > http://www.crompton.com/hamradio/BeagleBoneBlackAllstar/
> >
>