you are permitted 4W of transmit, not 1.
On Tue, Sep 17, 2013 at 7:39 AM, Colin Stanners <[email protected]> wrote: > Preface: are we talking outdoors? I'm afraid all of that gear (wifi > routers, separate amps, cantennas) is junk at multiple levels that'll waste > money while still not working well. > > -if you want to put stuff outdoors, use an outdoor radio instead of lots > of indoor equipment which'll need an ugly indoor setup with expensive coax > going outside and/or an expensive outdoor enclosure that may not offer > enough temperature protection. > > -the d-links are wifi routers, they do not offer any non-CDMA protocol for > long distance/reliability, they have little transmit power, indoor only > temperature range, limited voltage input range. Note the 2 antennas are on > the same "radio" / in the same collision domain so you can't point them to > different places or use them as separate "networks". > > -you don't want a separate amplifier to make up for having a crappy/cheap > radio. The delay they take to switch from rx to tx isn't great for faster > modern protocols. And if they screw up the timing of that switch due to > power fluctuations I've seen them fry the radio's receivers. > > -cantennas have low gain (12db?), and they work for playing around > indoors, but anything more permanent/outdoors needs good mounting options, > waterproofing and a solid design that'll survive use. Everything I've done > outside uses panels or dishes that go up to 19, 24, 30db, or for the > omnidirectional antenna at your central point that's 12-14db. > > -depending on where this is setup, how much LOS and interference there is, > 5.x ghz may be a better choice than 2.4ghz. > > A good multipoint setup, either indoor or outdoor, 2.4ghz or 5.x ghz, uses > standalone radios (Canopy if you have money [but there's good sales these > days on the old 14mbit gear], Ubiquiti/Mikrotik wifi radios in TDMA mode if > you don't have money [and can make compromises]), with a ~15dbi omni or > ~17dbi sector antenna at the AP and clients with 8-24 dbi antennas > depending on need. > > > On Mon, Sep 16, 2013 at 11:10 PM, Rob Guderian <[email protected]>wrote: > >> Preface:I'm planning on building an internet of things over a somewhat >> large area. >> >> I just picked up two DIR-615s which will be running dd-wrt as local >> hubs. They have 2 antennas, so I'm planning on having a directional >> antenna to a (signal boosted) main hub, and having one antenna doing >> local traffic. >> >> Question dump time: >> 1. afaik This router is only 2.4GHz, so presumably these antennas are >> both on. Correct? >> >> 2. Boosters. We're limited to 1W power output on antennas before >> getting a license, correct? >> >> 2a. Anyone got a line on a good booster? USB need not apply. DX has >> >> http://dx.com/p/sunhans-sh-2000-2-4ghz-wireless-wifi-broadband-amplifier-signal-booster-silver-214735?gclid=CKzT9u7C0bkCFS_ZQgoduFYA8A >> - but it's 2W. >> >> 3. There's multiple designs for cantennas. Anyone here ever build one? >> Experiences? >> The lame: >> http://www.techradar.com/news/computing-components/peripherals/build-the-ultimate-wi-fi-boosting-cantenna-684073/2#articleContent >> or http://www.instructables.com/id/WiFi-Cantenna-without-pigtail/ >> To the compicated: >> >> http://www.makeuseof.com/tag/how-to-make-a-wifi-antenna-out-of-a-pringles-can-nb/ >> which is a yagi antenna, and should have more gain. >> _______________________________________________ >> SkullSpace Discuss Mailing List >> Help: http://www.skullspace.ca/wiki/index.php/Mailing_List#Discuss >> Archive: https://groups.google.com/group/skullspace-discuss-archive/ >> > > > _______________________________________________ > SkullSpace Discuss Mailing List > Help: http://www.skullspace.ca/wiki/index.php/Mailing_List#Discuss > Archive: https://groups.google.com/group/skullspace-discuss-archive/ >
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