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WiFi for boats

 
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Bruce in Alaska

External


Since: Jun 24, 2004
Posts: 213



(Msg. 1) Posted: Wed Aug 15, 2007 4:55 pm
Post subject: WiFi for boats
Archived from groups: rec>boats>electronics (more info?)

Ok, I know I should have payed attention back when this was a HUGH
Thread, BUT..... I now have an application for a wired (10bT/100bT)
Remote 802.11x "Device" that can connect a Laptop, via it's internal
Ethernet Port, back to my 802.11b Access Point, which is physically
2 miles up the beach from where the "Device" will be installed.

Seems like a "Close Neighbor" (within 10 Sq Miles) can sit out on
his BoatRamp and connect back to my "South" Access Point just using
his MacBook Laptop with the builtin WiFi and Antenna. It has very low
signal levels, but does connect and he is able to do Email, and Web
Surfing. So, now he wants to be able to use this from inside his
Cabin, and I need a "Device" that will allow him to use his LapTop
in the cabin, via Ethernet to the "Device", which will be located
down at the BoatHouse. I can deal with all the extra items, like
External Gain Antennas, POE (Power over Ethernet), ect, but I need
some suggestions on what the "Device" should be, and who makes the best
units.

In the planning, I would also like the option of being able to add
a second "Device", not nessesarily the same model or type as the first,
that could be connected to the first, via it's Ethernet Port, that would
allow multiple other Clients to connect back thru the first "Device" to
my network.

I remember that all this was dicussed, IN Detail, but rather than
sift thru all the previous posts again, it would be really handy
if one of the difinitive Marine Wireless Guru's would post what
he has found as a "Working System", for the Group, and fill me in.

Bruce in alaska
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rabidgoldfish

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Since: Apr 09, 2007
Posts: 3



(Msg. 2) Posted: Wed Aug 15, 2007 9:14 pm
Post subject: Re: WiFi for boats [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

Bruce in Alaska wrote:
> Ok, I know I should have payed attention back when this was a HUGH
> Thread, BUT..... I now have an application for a wired (10bT/100bT)
> Remote 802.11x "Device" that can connect a Laptop, via it's internal
> Ethernet Port, back to my 802.11b Access Point, which is physically
> 2 miles up the beach from where the "Device" will be installed.
>
> Seems like a "Close Neighbor" (within 10 Sq Miles) can sit out on
> his BoatRamp and connect back to my "South" Access Point just using
> his MacBook Laptop with the builtin WiFi and Antenna. It has very low
> signal levels, but does connect and he is able to do Email, and Web
> Surfing. So, now he wants to be able to use this from inside his
> Cabin, and I need a "Device" that will allow him to use his LapTop
> in the cabin, via Ethernet to the "Device", which will be located
> down at the BoatHouse. I can deal with all the extra items, like
> External Gain Antennas, POE (Power over Ethernet), ect, but I need
> some suggestions on what the "Device" should be, and who makes the best
> units.
>
> In the planning, I would also like the option of being able to add
> a second "Device", not nessesarily the same model or type as the first,
> that could be connected to the first, via it's Ethernet Port, that would
> allow multiple other Clients to connect back thru the first "Device" to
> my network.
>
> I remember that all this was dicussed, IN Detail, but rather than
> sift thru all the previous posts again, it would be really handy
> if one of the difinitive Marine Wireless Guru's would post what
> he has found as a "Working System", for the Group, and fill me in.
>
> Bruce in alaska

Most people around here use DD-WRT Firmware linksys WRT54GLs, Setup in
client mode. You may want to search around in this group for more
information. Basically you 'flash' the router firmware with DD-WRT
which is available from http://www.dd-wrt.com/ then configure it.

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Ansley W. Sawyer

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Since: Jul 22, 2005
Posts: 16



(Msg. 3) Posted: Thu Aug 16, 2007 7:48 am
Post subject: Re: WiFi for boats [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

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Bruce in Alaska

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Since: Jun 24, 2004
Posts: 213



(Msg. 4) Posted: Thu Aug 16, 2007 2:56 pm
Post subject: Re: WiFi for boats [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

In article <bruceg-5F053D.11290815082007.RemoveThis@netnews.worldnet.att.net>,
Bruce in Alaska <bruceg.RemoveThis@btpost.net> wrote:
>
> Bruce in alaska

thanks for the info, guys, now I have a place to start....

Bruce in alaska
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Geoff Schultz

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Since: Oct 11, 2006
Posts: 62



(Msg. 5) Posted: Thu Aug 16, 2007 3:45 pm
Post subject: Re: WiFi for boats [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

"Ansley W. Sawyer" <ansleys.DeleteThis@me.acadia.net> wrote in
news:ouidndTh79vopFnbnZ2dnUVZ_o6knZ2d@gwi.net:

> Bruce,
>
> Check this out.
>
> http://www.wlanmall.com/images/items/pdf/CB54E_d.pdf
>
> Ansley Sawyer
> SV Pacem

Can someone explain what "21 dBm" and "Up to 40 EIRP (dBi)" means in the
transmit power section of the above PDF file?

-- Geoff
www.GeoffSchultz.org
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Richard Lane

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Since: Nov 22, 2006
Posts: 30



(Msg. 6) Posted: Thu Aug 16, 2007 8:48 pm
Post subject: Re: WiFi for boats [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

Geoff Schultz wrote:

>
> Can someone explain what "21 dBm" and "Up to 40 EIRP (dBi)" means in the
> transmit power section of the above PDF file?
>
> -- Geoff
> www.GeoffSchultz.org

21 dBm is 21 dB above 1 mw of power ~105x. 40 dBi EIRP is 40 dB
(10,000x) up on the isotropic (radiated in a sphere) radiated power and
usually refers to a directional antenna gain but such a large number
must include the transmitter power probably relative to 1 mW.
Dick
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Geoff Schultz

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Since: Oct 11, 2006
Posts: 62



(Msg. 7) Posted: Fri Aug 17, 2007 5:59 am
Post subject: Re: WiFi for boats [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

Richard Lane <rqlhgl.DeleteThis@iieee.org> wrote in
news:fa35q901sk7@enews4.newsguy.com:

> Geoff Schultz wrote:
>
>>
>> Can someone explain what "21 dBm" and "Up to 40 EIRP (dBi)" means in
>> the transmit power section of the above PDF file?
>>
>> -- Geoff
>> www.GeoffSchultz.org
>
> 21 dBm is 21 dB above 1 mw of power ~105x. 40 dBi EIRP is 40 dB
> (10,000x) up on the isotropic (radiated in a sphere) radiated power
> and usually refers to a directional antenna gain but such a large
> number must include the transmitter power probably relative to 1 mW.
> Dick

I'm used to seeing transmit power listed in mW. So from this can I assume
that the transmit power is 105 mW? I still really don't understand what
the EIRP means.

-- Geoff
www.GeoffSchultz.org
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Richard Lane

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Since: Nov 22, 2006
Posts: 30



(Msg. 8) Posted: Fri Aug 17, 2007 8:29 am
Post subject: Re: WiFi for boats [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

Geoff Schultz wrote:
> Richard Lane <rqlhgl.RemoveThis@iieee.org> wrote in
> news:fa35q901sk7@enews4.newsguy.com:
>
>> Geoff Schultz wrote:
>>
>>> Can someone explain what "21 dBm" and "Up to 40 EIRP (dBi)" means in
>>> the transmit power section of the above PDF file?
>>>
>>> -- Geoff
>>> www.GeoffSchultz.org
>> 21 dBm is 21 dB above 1 mw of power ~105x. 40 dBi EIRP is 40 dB
>> (10,000x) up on the isotropic (radiated in a sphere) radiated power
>> and usually refers to a directional antenna gain but such a large
>> number must include the transmitter power probably relative to 1 mW.
>> Dick
>
> I'm used to seeing transmit power listed in mW. So from this can I assume
> that the transmit power is 105 mW? I still really don't understand what
> the EIRP means.
>
> -- Geoff
> www.GeoffSchultz.org
EIRP Effective Isotropic Radiated Power.
Dick
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Geoff Schultz

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Since: Oct 11, 2006
Posts: 62



(Msg. 9) Posted: Fri Aug 17, 2007 1:25 pm
Post subject: Re: WiFi for boats [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

Richard Lane <rqlhgl RemoveThis @iieee.org> wrote in
news:fa4esd094a@enews4.newsguy.com:

> Geoff Schultz wrote:
>> Richard Lane <rqlhgl RemoveThis @iieee.org> wrote in
>> news:fa35q901sk7@enews4.newsguy.com:
>>
>>> Geoff Schultz wrote:
>>>
>>>> Can someone explain what "21 dBm" and "Up to 40 EIRP (dBi)" means
>>>> in the transmit power section of the above PDF file?
>>>>
>>>> -- Geoff
>>>> www.GeoffSchultz.org
>>> 21 dBm is 21 dB above 1 mw of power ~105x. 40 dBi EIRP is 40 dB
>>> (10,000x) up on the isotropic (radiated in a sphere) radiated power
>>> and usually refers to a directional antenna gain but such a large
>>> number must include the transmitter power probably relative to 1 mW.
>>> Dick
>>
>> I'm used to seeing transmit power listed in mW. So from this can I
>> assume that the transmit power is 105 mW? I still really don't
>> understand what the EIRP means.
>>
>> -- Geoff
>> www.GeoffSchultz.org
> EIRP Effective Isotropic Radiated Power.
> Dick

I guess that I'm just really slow or you can't interpert my questions:

>>>> Can someone explain what "21 dBm" and "Up to 40 EIRP (dBi)" means
>>>> in the transmit power section of the above PDF file?

and

>> So from this can I assume that the transmit power is 105 mW?

A simple yes or no would be sufficient. If "No", what is the actual
transmit power?


-- Geoff
www.GeoffSchultz.org
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Bruce in Alaska

External


Since: Jun 24, 2004
Posts: 213



(Msg. 10) Posted: Mon Aug 20, 2007 7:42 pm
Post subject: Re: WiFi for boats [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

In article <Xns998F92D6BD86Dgeoffschultz.RemoveThis@216.196.97.136>,
Geoff Schultz <geoff"at"@geoffschultz.org> wrote:

> Richard Lane <rqlhgl.RemoveThis@iieee.org> wrote in
> news:fa4esd094a@enews4.newsguy.com:
>
> > Geoff Schultz wrote:
> >> Richard Lane <rqlhgl.RemoveThis@iieee.org> wrote in
> >> news:fa35q901sk7@enews4.newsguy.com:
> >>
> >>> Geoff Schultz wrote:
> >>>
> >>>> Can someone explain what "21 dBm" and "Up to 40 EIRP (dBi)" means
> >>>> in the transmit power section of the above PDF file?
> >>>>
> >>>> -- Geoff
> >>>> www.GeoffSchultz.org
> >>> 21 dBm is 21 dB above 1 mw of power ~105x. 40 dBi EIRP is 40 dB
> >>> (10,000x) up on the isotropic (radiated in a sphere) radiated power
> >>> and usually refers to a directional antenna gain but such a large
> >>> number must include the transmitter power probably relative to 1 mW.
> >>> Dick
> >>
> >> I'm used to seeing transmit power listed in mW. So from this can I
> >> assume that the transmit power is 105 mW? I still really don't
> >> understand what the EIRP means.
> >>
> >> -- Geoff
> >> www.GeoffSchultz.org
> > EIRP Effective Isotropic Radiated Power.
> > Dick
>
> I guess that I'm just really slow or you can't interpert my questions:
>
> >>>> Can someone explain what "21 dBm" and "Up to 40 EIRP (dBi)" means
> >>>> in the transmit power section of the above PDF file?
>
> and
>
> >> So from this can I assume that the transmit power is 105 mW?
>
> A simple yes or no would be sufficient. If "No", what is the actual
> transmit power?
>
>
> -- Geoff
> www.GeoffSchultz.org

Ok, Geoff, I'll explain it ....... ERP = Effective Radiated Power
This is Output Power + Antenna Gain - Feedline Loss
It can be expressed in dbm = db Referenced to 1 Milliwatt, OR
it can be expressed directly in Watts or Milliwatts, as well

EIRP = Effective Isotropic Radiated Power
This is Output Power - Feedline Loss without any Antenna Gain
it can be expressed in dbmi = dbm referenced to 1 Milliwatt, Isotropic.
It can also be expressed directly in Watts or Milliwatts as well.

All that Isotropic means is that you are NOT concerned with the Antenna,
or it's Gain or loss, in these power calculations or expressions.


Bruce in alaska
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Larry

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Since: Nov 05, 2005
Posts: 1354



(Msg. 11) Posted: Tue Aug 21, 2007 1:42 am
Post subject: Re: WiFi for boats [Login to view extended thread Info.]
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Bruce in Alaska <bruceg RemoveThis @btpost.net> wrote in news:bruceg-
6B5A3B.11430520082007 RemoveThis @netnews.worldnet.att.net:

> Referenced to 1 Milliwatt

I was always partial to kilowatts, myself...(c;

Larry
--
POWER is our friend!
http://www.broadcast.harris.com/product_portfolio/prod_media/dx200.pdf
"Can you hear me now, little Verizon guy?"
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Wayne.B

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Since: Mar 04, 2007
Posts: 866



(Msg. 12) Posted: Sat Aug 25, 2007 10:19 pm
Post subject: Re: WiFi for boats [Login to view extended thread Info.]
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On Wed, 15 Aug 2007 19:28:25 GMT, Bruce in Alaska <bruceg.DeleteThis@btpost.net>
wrote:

>I need a "Device" that will allow him to use his LapTop
>in the cabin, via Ethernet to the "Device", which will be located
>down at the BoatHouse. I can deal with all the extra items, like
>External Gain Antennas, POE (Power over Ethernet), ect, but I need
>some suggestions on what the "Device" should be, and who makes the best
>units.

Here are a couple of other possibilities:

http://wlanparts.com/product/NCB-3220

http://wlanparts.com/product/NOC-3220

http://wlanparts.com/product/NOC-3220PLUS

I'm using a 3220 on my boat as a long range client with good results.
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