[FADCA] Anticipated Signal Levels- 9.6KB

[Chuck Hast]

On Sat, 15 Jan 2005 17:58:31 -0500, bud thompson <budt at cfl.rr.com> wrote:
> Who can comment with specific experience?
> 
> All else being equal - Where there is a dedicated backbone w/o any QRM....
> 
> Question: What RF signal level can be expected at the receiver input?
> 
> Put two UHF 9.6kb backbone  stations 160 miles apart  in Florida and there
> is no signal.
> Put two UHF 9.6kb backbone stations 10 miles apart and it shouldn't take
> much power to make them work.
> 
> In our Reality Packet network in Florida, backbone links will be 30-55 mile
> paths.
> 
> What is a reasonable minimal uv of RX signal we can expect to accommodate?
> 
> This is not a WEAK SIGNAL service.. we want 90%+ efficiency 24/7... this is
> not satellite or meteor scatter packet. If it takes 100w and a 13el beam
> that is okay.
> 
> Our subjective tests today (Mitreks on each end) indicate that we can have
> very good transfers at 1.0uv.  Lower than that the throughput suffers.
> 
> bud N0IA
> 


Give me the following.
Site 1 lat/lon  dd:mm:ss
Site 1 antenna agl (center of radiation)
Site 1 transmission line loss (connectors, cable, duplexers, etc)
Site 1 antenna gain (dbd prefered but can use dbi)
Site 1 TX power
Site 1 RX sensitivity (if you can get a signal generator and modulate it with a
          TNC to get this one that would be very good indeed)
Site 2 same as above.
Give me 1 link pair to start with. 

-- 
Chuck Hast 
To paraphrase my flight instructor;
"the only dumb question is the one you DID NOT ask resulting in my going
out and having to identify your bits and pieces in the midst of torn
and twisted metal."