Howdy,
Is there an email reflector for remote station control? I am looking into remote controlling some radios via Ethernet. I need to create a point to point Ethernet connection of a mile or so. I am especially interested in using 900 MHz to go through rather than over the trees. I can find lots of antennas, but very few Ethernet to 900Mhz radios.
My new QTH has many trees around the house (great for HF wires - bad for satellite) I have another chunk of land not far from here which is pretty much in the clear.
Thanks and 73, Joe kk0sd
Ethernet. I need to create a point to point Ethernet connection of a mile or so. I am especially interested in using 900 MHz to go through rather than over the trees...
SO true. As the leaves are falling, my wireless internet access is now up to 5 bars from the usual 2 bars or less in the summer. When all the leaves are off, I'll be up to 8 bars and have 11 Mbyte rates again...
Bob, Wb4APR
Motrolo makes a 900, 2400 and 5600 mc Ethernet link. The 900 mc will go 1-3+ miles at 1 mega bit. 900 has the longest range when you have Trees. The ohter modes will not work with trees. for aprox $1000 you can setup a very "reliable" 1+ mile 900 mc ethernet link.
or, you can use a pair of 2.4 wifi's, amps and big antennas, no trees. Non hams have a 4 watt erp wifi limit. Hams have a 390 watt erp wifi limit on channel 1 in the usa.
A $200 solution needs the words "un-reliable"
--- Robert Bruninga bruninga@usna.edu wrote:
Ethernet. I need to create a point to point
Ethernet
connection of a mile or so. I am especially
interested in
using 900 MHz to go through rather than over the
trees...
SO true. As the leaves are falling, my wireless internet access is now up to 5 bars from the usual 2 bars or less in the summer. When all the leaves are off, I'll be up to 8 bars and have 11 Mbyte rates again...
Bob, Wb4APR
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
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MM wrote:
for aprox $1000 you can setup a very "reliable" 1+ mile 900 mc ethernet link.
Zoinks! Couldn't you just modify an off the shelf $35.00 2.4Ghz 802.11b WAP by downconverting the output to some legal frequency range/output level? I'm not up on the legalities of 900Mhz data operation, but since you mentioned it I'd imagine you could mix the output of the WAP with a 1500MC oscillator and filter out a 900 Mhz signal?.. and I think you can control the bandwidth of the signal by throttling the data rate IIRC.
I'm positive there is an IF in there you could tap to make the whole operation easier and more efficient.. You could probably use retuned surplus GSM cell phone hardware to re amplify your 900 Mhz signal as well.
I think you could try that, scrap everything, and start over a few times before you reached 1000 dollars!
I'm just totally in the dark as to how Part 15/97 rules would apply at that point.. I've never had to give it much thought.
73, Jason N1XBP
Hi Bob, Joe,
This is very interesting; I have the reverse situation. My home internet connection is from a wireless ISP who uses 2.4 ghz 802.11b Wi-Fi equipment. The run from my house to his central antenna is about 3/4 mile, with a gain omni on his end, and a grill on mine. There are a few trees that we're shooting through, trunks mostly, aiming between the fluffy stuff. I've had this setup for several years now, and by far most of my problems with service are in the fall. Rain is not a factor (it doesn't really start raining much here until winter sets in). Not the leaves (they're falling not growing). Not anything I can put my finger on. I'd love to understand why. Any ideas?
Greg KO6TH
----Original Message Follows---- From: "Robert Bruninga" bruninga@usna.edu Reply-To: bruninga@usna.edu To: "'Gary "Joe" Mayfield'" gary_mayfield@hotmail.com, amsat-bb@amsat.org Subject: [amsat-bb] Re: Station Control Help Date: Fri, 10 Nov 2006 09:43:53 -0500
Ethernet. I need to create a point to point Ethernet connection of a mile or so. I am especially interested in using 900 MHz to go through rather than over the trees...
SO true. As the leaves are falling, my wireless internet access is now up to 5 bars from the usual 2 bars or less in the summer. When all the leaves are off, I'll be up to 8 bars and have 11 Mbyte rates again...
Bob, Wb4APR
_______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
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Robert Bruninga wrote:
SO true. As the leaves are falling, my wireless internet access is now up to 5 bars from the usual 2 bars or less in the summer. When all the leaves are off, I'll be up to 8 bars and have 11 Mbyte rates again...
Bob, Wb4APR
11 MB(ytes)/s is an impressive speed, Bob. Perhaps you meant 11Mb(its)/s, however.
(I really can't resist giving a science teacher grief when he goofs up units! That is, unless he has a very fast wireless network connection.)
;-)
Nate WY0X
There are several commercial vendors of ethernet->Serial radios used in production telemetry applications. Freewave is one such company that I know about, and there are several others. Use google with some of these terms and you'll find companies who do this. Then you'll just need to go looking for the right priced solution from the right priced source :-)
Gregg Wonderly W5GGW
participants (7)
-
Gary "Joe" Mayfield -
Greg D. -
Gregg Wonderly -
Jason White -
MM -
Nate Duehr -
Robert Bruninga