[OZAPRS] APC510 tracker

[Owen Duffy]

Hi All,

On 13/10/2014 23:54, Bob Lockley VK6KW wrote:
> Hi Owen,
> Your comment on RHR vs AMW is interesting - but could it be explained if RHR
> was "busy" at those times when YMC was beaconing?
> Bob VK6KW
Yes, there are a number of possible explanations to account for some of
the difference.
There would be times when RHR was hearing another signal that AMW was
not... but AMW is usually busier than RHR as its primary catchment
includes more populated area... so AMW should be at a relative
disadvantage due to local activity.

AMW was a greater distance, usually a disadvantage.

Possible explanations at RHR include higher interference, poorer
receiver sensitivity, poorer decoder compatibility (root cause might
actually be the tracker).

One of Bruniga's bright ideas (not?) was that digis should intentionally
collide with each (his "fratricide" concept). Where digis operate in
that way, there can be systematic loss of packets from one digi because
they often transmit simultaneously and the other is stronger to the
observer.

The modern ham might advise "don't worry, just use it", but the
difference intrigues me.

73
Owen