[aprssig] Airborne Digis

[Byon Garrabrant]

The frequency agile MiroTraks currently cannot be configured to
alternate between different frequencies, but that is a feature that
could be coded in the future.

The TinyTrak4 does support preemptive digipeating, marking the
previous digis as used, with dupe checking, and also supports
proportional pathing.

Byon

On Mon, Sep 14, 2009 at 4:03 PM, Keith VE7GDH <ve7gdh at rac.ca> wrote:
> Bob WB4APR wrote...
>
>> Maybe the best solution is the specialized trackers that can alternate
>> paths.  Send every other packet on 144.99 for the potential when there
>> is an aircraft in view.  But send on 144.39 most of the time...
>>
>> OOPS, most trackers cannot auto QSY like that.
>
> The RTrak from RPC Electronics can do that. www.rpc-electronics.com
>
> It is essentially an OpenTracker (OT1+) built into a 500 mW transmitter.
> The current model has a built-in GPS receiver and a provided external
> antenna.  It is frequency agile and can be programmed for any frequency
> between 144 and 148 MHz. It has the ability to transmit on the alternate
> frequency every X transmissions. It can also do SmartBeaconing and
> profile switching based on altitude, speed, temperature, voltage, ADC
> input, a jumper (external switch) or valid / invalid GPS fix.
>
> While the T2-301 is frequency agile as well, it would require changing
> the frequency with the SETFREQ command.  While this can be done at any
> time from a terminal program or e.g. Nuvi 350, or even a built-in
> script, you wouldn't want to constant toggle the frequency as it would
> write to the flash ram every time you did it. With normal use and
> occasional re-programming, it should last many years. Toggled every
> minute, it would probably wear out in weeks or months. I don't recall
> the exact details on how many times it can be written to, but it is a
> limited number of times.
>
> Perhaps someone could comment on the frequency agile Micro-Traks from
> www.byonics.com.
>
> 73 es cul - Keith VE7GDH
> --
> "I may be lost, but I know exactly where I am!"
>
>
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