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[aprssig] D710 GPS Port

Scott Miller scott at opentrac.org
Tue Aug 14 17:27:13 UTC 2007


And if I was going to make that sort of investment in new hardware, I'd 
rather have something a little more open and with a better architecture.

Yeah, they say it's open, but have you ever looked at the specification? 
  Check it out:

http://www.arrl.org/FandES/field/regulations/techchar/D-STAR.pdf

It's poorly translated and incomplete, and contains some real 
head-scratchers like this one:

"?? flag is used as an format descriptor.  This is available not only 
for the increase and decrease of a figure of callsign but also for ID, 
which is not used as callsign rather than numeric."

Huh?  I also can't get the proper fonts to load to show the missing 
characters, which happen to include some rather important things like 
the scrambler initialization.

Maybe they've updated the document since last time I checked - I'd swear 
the scrambler and FCS polynomials were missing before, but they're there 
now.  Still, at 10 pages of real content it's a bit lean for a protocol 
specification.

Scott
N1VG

Drew Baxter wrote:
> Cost and proprietary infrastructure are two killers (for me at least) 
> when it comes to D-Star. The likelihood of D-Star ever coming to the 
> State of Maine in any capacity is probably extremely slim.  I'd say this 
> is probably the case in various other parts of the rural countryside 
> too.  APRS works because it requires relatively cheap hardware to 
> implement, mostly rigs, computers, TNCs we already demoted or already 
> have in service.
> 
> However, a lot of our APRS infrastructure seems to have vanished too.  
> It used to be I had near continuous coverage in this region, but 
> nowadays there's a lot of dead zones.  I know it isn't anything to do 
> with my rig since my neighbor has the same problem.  Could be a path 
> issue though.
> 
> --Droo, K1XVM
> 
> At 12:13 PM 8/14/2007, William McKeehan wrote:
>> Has anyone looked at D-Star as a potential replacement for APRS?
>>
>> It seems to have a lot of the basic functionality.
>> -- 
>> William McKeehan
>> KI4HDU
> 
> 
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