[OZAPRS] VK4VP-15 Tiny Trak 3 HF config

[Andrew McDade]

Gday Gordon,

The settings provided on the web site are set to be bandwidth friendly. 
Basically the corner pegging is more or less disabled by winding up those 
particular settings to maximum. So then we are left with the beacons due
to 
rate of speed change algo, which is also set so as to really wind back the

beacon rate when stationary and increase the beacon rate to 10 minutes 
whilst mobile. These are a good HF friendly set of parameters, however
like 
all things, can be altered and experimented within to suit individuals 
requirements. The basic philosophy for HF beacon rates in Australia is no 
quicker that once per 5 minutes period. However globally I think they talk

about beacon rates no quicker than once every 10 minutes or so whilst
mobile 
and perhaps once every 20-30 minutes when stationary. Certainly any 
configuration that generates beacons quicker than once a minute on HF is 
really going to cause some issues when there are a few HF mobiles running 
around.
On VHF the concept is the same in that the corner pegging is essentially 
disabled. Again this setting creates the most bandwidth friendly 
configuration. From the experiences we've seen, its the corner pegging
algo 
that can really generates too much traffic.
and like you say the critical parameter there is the "MIN TURN TIME". This

parameter could probably be mucked about with some more,  so as to
generate 
some corner pegging, but without over doing it. So on VHF you could set
the 
"min turn time" to say 90 seconds,  "min turn angle" to 30 degrees, and 
"turn slope" to 255. On HF perhaps we could try "min turn time" to 240 
seconds ( 4 minutes ) , "min turn angle" 30 degrees, and "turn slope" to 
255. I haven't actually tested these parameters fully myself , however it 
would be interesting to see the outcome.

Regards .. Andrew .. VK5EX


--- Original Message ----- 
From: "Gordon Taylor" <gordon.t at internode.on.net>
To: "'VK / ZL APRS Users'" <ozaprs at aprs.net.au>
Sent: Wednesday, April 11, 2007 7:13 PM
Subject: Re: [OZAPRS] VK4VP-15 Tiny Trak 3 HF config


> Tony,
> Thanks for the info, I will change it tomorrow to 120 degrees and
> trial the other settings.
>
> However I note the recommended turn angle for VHF is 180 degrees, seems
to
> negate the idea of smart beaconing. I would have thought the VHF turn 
> angle
> would be less than HF not more.
>
> The min turn time of 255 secs will prevent excessive beaconing while
> reversing, hairpin bends etc, so that is a good change I will make.
>
> With so few users on HF, is a higher than normal beacon rate a real 
> problem,
> maybe only when there a few HF stations, i.e holidays etc.
>
> I am open to ideas and suggestions so feel free to tell me I am wrong.
>
> Regards Gordon VK4VP
>
> -----Original Message-----
> From: ozaprs-bounces at aprs.net.au [mailto:ozaprs-bounces at aprs.net.au] On
> Behalf Of Tony Hunt
> Sent: Tuesday, 10 April 2007 10:48 PM
> To: OZ-APRS Mial-list
> Subject: [OZAPRS] Tiny Trak 3 HF config
>
> This ones for VK4VP-15 in particular , who got a lot of people upset
this
> last weekend.. Turn angles like 30 degrees are a disaster. Ive fallen
foul
> of this one myself . Unless your driving down straight highways for many
> hours you just cant run agressive corner pegging on HF.. Have a look
here 
> as
> was mentioned on a earlier post.. Heres the URL for a few TT3 Configs
> including HF http://vk3.aprs.net.au/tt_settings.htm
>
> Tony Hunt  VK5AH
>
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> 10:44 PM
>
> 
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