Re: TI-H: Q and C about long distence links

Subject: Re: TI-H: Q and C about long distence links
From: travisp <travisp@inil.com>
Date: Sat, 2 Nov 1996 21:38:38 -0600
In-Reply-To: <TI-H: Q and C about long distence links>
First, you tell the person, "Hey, lets play Z-Pong linked with my RF link!
Plug it into your port, turn it on, and start the program!" To the
calculator, it would think it's connected via a cable. Second, RF and IR
can be tuned to operate at different frequencies, so when I link to you, we
are on one freq., and someone else in the area is on a different freq. Only
the 2 calcs with matching frequencies would link. "Won't there be terrible
interference with an RF link?" you probably ask. Ask yourself, "When I turn
on the radio to 101.1 FM, do I also hear 103.5 FM?" Your answer is no. So
three calcs wouldn't interfere with one another. It's like your phone call;
you connect over a unique wire. Here, you connect over a unique frequency.
Hope this helps ya get it.


   _
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|_   _| | ___\ /   |  \ \  / / | |  / __/ |   \
  | |   | |    | O \   \ \/ /  | |  |__ \ | O |
  \_\   |_|    \_|\_\   \__/   |_|   \__/ |  _/
    Travis Pettijohn  travisp@inil.com    |_|
    http://www.inil.com/users/travisp/




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> From: Robin, Jim, &amp; Eric Barker <rbarker@polarnet.com>
> To: TI-Hardware <ti-hardware@lists.ticalc.org>
> Subject: TI-H: Q and C about long distence links
> Date: Saturday, November 02, 1996 9:05 PM
> 
> I have a question about any kind of long distence link usage such as an 
> Radio Transmission Link or an Infered Link.  Let me use an example.  
> When I call someone on the phone, the phone is on and ready for a 
> transmission, that way, the phone will give a ring and I (hopefully) 
> will answer it.  But with a link on the calculator, the calc isn't 
> always on, and if it is it probably is doing something other than 
> listening for a link transmission.  What then?  You can write a program 
> to patch ZShell so that it will be constently be listening for a 
> transmission but then it would slow down ZShell programs consiterably.  
> So if there will be an RTL or IRL what will be done about it?
> 
> 	Also, if there are three long distence link fitted calcs in the area, 
> who is going to know who's taling with who?  I mean, you can easily send 
> location flags before a transmission with a modem, but we are talking 
> about a 5Mhz proccessor here.  It would really slow things down.
> 
> Eric B.
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