joseph2k said:
You had better read your terms of licence a LOT better. It does NOT
support
that bandwidth in that frequency range.
OHHH get real -- you can run TCP/IP over packet at 1200 baud FSK in 5khz FM
bandwidth, and if you didnt mind moving at a crawl -- you could kick down to
110 baud and do it in less than 1khz of bandwidth.. if we can get away from
radios with voice front ends, we can get up to 9600 baud out of a 10khz QPSK
channel, but there doesnt seem to be much off the shelf hardware for that
one -- will have to piece together a system for that.. anything over 9600
will take a fully custom solution and a wider channel to run it on.
Thats why I keep asking how much of a slot he has so I can pick a modulation
scheme that will best use the bandwidth he does have allocated !!
OK keeps asking for commecial solutions -- and I can get him 1200 baud off
the shelf -- but he isnt going to do any better than that with OTS hardware
in that frequency range without a custom solution -- and if he has more than
5-12 khz of bandwidth available, it WILL take a custom solution to get the
best use out of it.
other than that -- getting VHF to go 100km just takes a coupla of yagi beams
and some reasonably high towers to get a clear line of sight
the only other thing thats really going to hurt him is if he really only has
bandwidth for one channel -- if so -- he is stuck with half duplex and its
going to be dog slow no matter what the baud rate is... he would be a LOT
better off if he had 2 channels spaced 3-5mhz apart to run full duplex