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[aprssig] Re: D-STAR video on YouTube

Andrew Rich vk4tec at people.net.au
Mon Sep 24 06:31:58 UTC 2007


Am I missing something with DSTAR.

If all you want to do is pass messages, 1200 baud packet is fine.

The only advantage I can see with DSTAR is the faster data speed.

But then that is disadvantaged by the higher frequency.

I wrote a HTML based system using packet radio and it worked well.

Maybe it is the attraction of pushing the IP stack into the radio .




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Andrew Rich VK4TEC
vk4tec at people.net.au <mailto:vk4tec at people.net.au>
http://www.tech-software.net




-----Original Message-----
From: aprssig-bounces at lists.tapr.org
[mailto:aprssig-bounces at lists.tapr.org]On Behalf Of Mark Fellhauer
Sent: Monday, 24 September 2007 4:25 PM
To: TAPR APRS Mailing List
Subject: [aprssig] Re: D-STAR video on YouTube


At 10:57 PM 9/23/2007, Noel Shrum wrote:

>Mark Fellhauer wrote:
>>So go ahead and bad-mouth D-Star all you want.  It just makes you look
>>silly.   We even have people here rooting for its demise.  AND, IMHO,
>>that's the same thing as rooting for the demise of Ham Radio.
>
>What is silly is your last statement there.
>You have way too much emotion invested into your argument.

I have nothing invested in D-Star but about 500 dollars.  My emotion is
based on my investment in APRS.   People say that D-Star "violates" the
spirit of ham radio.  Doesn't rooting for the demise of D-Star violate the
spirit of Ham Radio?   Think of the time, effort, physical labor, and cash,
put into the already incredible growth of D-Star by other ham radio
operators.  My point is and was that people here get very upset by APRS
detractors in the Ham Radio community.   Can't we here on this SIG, be
better than that?  Apparently not.

You seem to be totally unaware of the incredible growth D-Star has seen in
the last year.  I spent 3 years in the 1990's to get a dozen people using
APRS in Phoenix.




>Ham Radio hasn't died just because CW is no longer a test requirement, and
>if D-STAR lives or dies, Ham Radio will live on.  Ham Radio isn't a single
>mode.  Ham Radio is about Communication.
>
>Now my complaint about D-STAR, from what I have read you can't use it with
>standard repeaters.  Do Icom D-STAR radios transmit FM also?
>I have also read that D-STAR takes up more bandwidth than analog FM.
>Is that right? That does not seem like a good thing to be using on 2M.

You've been the victim of D-Star FUD.

D-Star radios can transmit on standard FM, just like any radio.

Standard repeaters will not work with D-Star mode.  But since we've seen
that D-Star works very well on AO-27, standard repeaters can be modified to
deal with D-Star.

The San Diego D-Star repeater on Mt. Woodson which was KE6KRU until last
Saturday and now KI6KQU under the auspices of PAPA, is a voice repeater
modified to pass D-Star traffic.  It is by far my favorite D-Star repeater
as regular users go.

D-Star takes less bandwidth than analog FM.   In marginal conditions D-Star
works better than FM in many cases.

And if you think Ham Radio will live on - I think you need to look at the
numbers of people coming into ham radio again and their
demographics.    People who want to stay the course and stick to a 1998
model of ham radio are dooming us.


Mark
KC7BXS


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