In article , "Bob Lewis \(AA4PB\)"
says...
I will use this in a robot. I am looking for 100 - 300 mile range.

That's a pretty tall order for a reliable 24/7 communications link to
a robot on the ground with a short whip antenna unless you use a
satellite link of some sort.



hi bob:

exactly. not to mention, you have data bandwidth limitations. you can't
do much legally with OP's 50MHz. if you have a commercial link it's
easy. for a commercial app we're looking at something along the lines of
plant control. I'd opt for a setup where i could check the status of the
bot via inet, cellphone, or satcom through a server at the plant
interfaced with those precertified 2.4Ghz links. 1Mbps! tell your bots
to do something. "hey, bot! pack a dozen cases of Bacardi." the bot
should have enough brains to do that, right? "make 500 line number blah
blah boards. oh yeah, and by the way, bot, here's the files. Have a
nice day! :-)"

hopefully, there's someone around if the bots go nuts. at least someone
who can shut 'em down before they drink all the Bacardi. assuming he/she
hasn't drunk it all him/herself. :-0

so if anyone's alive when things settle down, perhaps they could page
someone to pulease come in and fix things. if the plant computer detects
no life readings it would have to page someone itself :-(

a POTs setup would be good in tandem with this setup. call your plant
computer and use DTMF commands.

heh, heh... hope this works, right? better tell the security bot to be
extra alert.

BRs,
mike