Equipment Suggestions needed

mlee2 · 06-18-2004

I just recently set up a point-to-point bridge for Internet sharing, spanning .6 miles, with quite a few trees in the way. I have a 24Dbi grid antenna on each end mounted aprox 50 ft high. I initally installed 2 D-link DWL-2100AP units in bridge mode, but could not make a link, probably due to the low output (around 32mw).
I then upgraded to a pair of Senao NL-3054CB3 units with 200mw power. I was able to make a link, but was too weak to be useable. I then added a pair of Teletronics amplifiers. This gave me enough power to have a stable connection.
But shortly after adding amplification, one of my Senao NL-3054CB3 units went out. Calls to the seller, and the Senao factory rep indicated they were out of these units, and may be several weeks or more, until a replacement unit would be available.
I am concidering doing away with the Senao bridge units and going with something a little more readily available and less expensive, such as D-link or Linksys. Since I now have amplification in place, the output of the units are not of concern.
I would appreciate any and all recommediations/comments as to which access point/bridge units would be best.

jeremycobert · 06-19-2004

have you thought about trying a linksys WAP54G or WRT54g . both of these have open source firmware upgrades from www.sveasoft.com I have the wrt54g and you can increase the output of the antennas from its standard 34mw up to 84mw's. go to their forums and read more about the firmware if you're interested, but with the upgrade in firmware its a really powerful sub 100$ router/ap

f0urtyfive · 06-19-2004

[quote=mlee2]I have a 24Dbi grid antenna on each end mounted aprox 50 ft high. I then upgraded to a pair of Senao NL-3054CB3 units with 200mw power. I then added a pair of Teletronics amplifiers. This gave me enough power to have a stable connection.[quote]

Yeah, and enough power to radiate the neighborhood... Isnt this WAYY above the Max ERP? At least in the united states (and it sounds like any country that would HAVE limits)...

200 mw + amplifier + 24 db + 24db + amplifier + 200 mw...

1 watt amps?

wrzwaldo · 06-19-2004

Quote:

Originally Posted by mlee2

I just recently set up a point-to-point bridge for Internet sharing, spanning .6 miles, with quite a few trees in the way. I have a 24Dbi grid antenna on each end mounted aprox 50 ft high. I initally installed 2 D-link DWL-2100AP units in bridge mode, but could not make a link, probably due to the low output (around 32mw).
I then upgraded to a pair of Senao NL-3054CB3 units with 200mw power. I was able to make a link, but was too weak to be useable. I then added a pair of Teletronics amplifiers. This gave me enough power to have a stable connection.
But shortly after adding amplification, one of my Senao NL-3054CB3 units went out. Calls to the seller, and the Senao factory rep indicated they were out of these units, and may be several weeks or more, until a replacement unit would be available.
I am concidering doing away with the Senao bridge units and going with something a little more readily available and less expensive, such as D-link or Linksys. Since I now have amplification in place, the output of the units are not of concern.
I would appreciate any and all recommediations/comments as to which access point/bridge units would be best.

Sounds like it's time for someone to go spend some money on a CLUE! Please do this quick before you cause harm to someone unknowing of your stupidity. What were you trying to accomplish by front ending an amp with a 200mw card? Here are a couple quotes from your amp vendor on a couple of thier different amps.

Quote:

1W

Full output power of 1W is achieved with
only 4mW input to the amplifier. Above 4
mW input, the smartamp attenuates the
input signal power and maintains the
output power typically at 1W.

5W

Full output power of 5W is achieved with only
2.5mW input to the amplifier. Above 2.5 mW
input, the smartamp attenuates the input
signal power and maintains the output power
typically at 5W.

500mw

Full output power of 500mW is achieved
with only 2.5mW input to the amplifier.
Above 2.5 mW input, the smartamp
attenuates the input signal power and
maintains the output power typically at
500mW.

Congratulations on your induction into the hall of shame. It looks like you have more money than brains.

P.S. You may want to consider a 900MHZ solution.

mlee2 · 06-19-2004

these are 500mw amps. This is a single point-to-point setup, with fixed directional antennas, and 75ft cable loss. You are allowed more power with type of setup.

wrzwaldo · 06-19-2004

Quote:

Originally Posted by mlee2

these are 500mw amps. This is a single point-to-point setup, with fixed directional antennas, and 75ft cable loss. You are allowed more power with type of setup.

So now I have to ask...

Did you do the math or just cobble some shit together and hoped it worked?

I'm betting you went with the cobble solution.

Do you know what power you are allowed in a point-to-point configuration?

I think you know enough to be dangerous and thats about it.

kakayo · 09-02-2004

Point to point directional is allowed a 24dbm power gain with a 24dbi antenna gain. losses are allowed but the total must not exceed the gains above, this is info taken from a site posted as fcc allowed. Though I don't know if this is per installation, it is the reasonable asumption. If I'm not mistaken usually 500mW translates into 27dbm so there has to be a minimum of 3db loss between cable and connectors and lightning arrestors or whatever, if not the fcc will probably visit and have fun.

06-18-2004	#1 (permalink)
mlee2 Registered Member Join Date: May 2004 Posts: 6	Equipment Suggestions needed I just recently set up a point-to-point bridge for Internet sharing, spanning .6 miles, with quite a few trees in the way. I have a 24Dbi grid antenna on each end mounted aprox 50 ft high. I initally installed 2 D-link DWL-2100AP units in bridge mode, but could not make a link, probably due to the low output (around 32mw). I then upgraded to a pair of Senao NL-3054CB3 units with 200mw power. I was able to make a link, but was too weak to be useable. I then added a pair of Teletronics amplifiers. This gave me enough power to have a stable connection. But shortly after adding amplification, one of my Senao NL-3054CB3 units went out. Calls to the seller, and the Senao factory rep indicated they were out of these units, and may be several weeks or more, until a replacement unit would be available. I am concidering doing away with the Senao bridge units and going with something a little more readily available and less expensive, such as D-link or Linksys. Since I now have amplification in place, the output of the units are not of concern. I would appreciate any and all recommediations/comments as to which access point/bridge units would be best.

09-02-2004	#7 (permalink)
kakayo Registered Member Join Date: Sep 2004 Posts: 1	you do the math with whatever equip you got Point to point directional is allowed a 24dbm power gain with a 24dbi antenna gain. losses are allowed but the total must not exceed the gains above, this is info taken from a site posted as fcc allowed. Though I don't know if this is per installation, it is the reasonable asumption. If I'm not mistaken usually 500mW translates into 27dbm so there has to be a minimum of 3db loss between cable and connectors and lightning arrestors or whatever, if not the fcc will probably visit and have fun.

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06-19-2004	#2 (permalink)
jeremycobert Registered Member Join Date: May 2004 Posts: 13	have you thought about trying a linksys WAP54G or WRT54g . both of these have open source firmware upgrades from www.sveasoft.com I have the wrt54g and you can increase the output of the antennas from its standard 34mw up to 84mw's. go to their forums and read more about the firmware if you're interested, but with the upgrade in firmware its a really powerful sub 100$ router/ap

06-19-2004	#3 (permalink)
f0urtyfive HAH! Join Date: May 2003 Posts: 68	[quote=mlee2]I have a 24Dbi grid antenna on each end mounted aprox 50 ft high. I then upgraded to a pair of Senao NL-3054CB3 units with 200mw power. I then added a pair of Teletronics amplifiers. This gave me enough power to have a stable connection.[quote] Yeah, and enough power to radiate the neighborhood... Isnt this WAYY above the Max ERP? At least in the united states (and it sounds like any country that would HAVE limits)... 200 mw + amplifier + 24 db + 24db + amplifier + 200 mw... 1 watt amps?

06-19-2004	#5 (permalink)
mlee2 Registered Member Join Date: May 2004 Posts: 6	these are 500mw amps. This is a single point-to-point setup, with fixed directional antennas, and 75ft cable loss. You are allowed more power with type of setup.