How short of a link are you looking at? Run the numbers first, bigger doesn't always mean better and you might find yourself having to turn down the radios so you're not screaming at each other.
On 09/23/2012 11:43 AM, Fred Goldstein wrote: > At 9/23/2012 06:17 AM, Paolo Di Francesco wrote: >> Hi All, >> >> I have noticed that lately many collegues are using Ubiquiti Nanobridge >> M5 (the one with small parabolic dish) and the product is nice for the >> signal (more or less). >> >> Unfortunately, I do not see in the *same price range*, the same product > >from Mikrotik. The only thing that I see is "SEXTANT 5HnD" which is >> declared to be 18dBi (much less that the 23dBi DECLARED by Ubiquiti) > Antenna gain is almost entirely a function of size; with a dish, it's > pretty straightforward. The NM5 has 326 and 400 mm dish versions, > for 22 and 25 dB nominal gain. The Sextant is 250 mm; the SXT is 140 > mm. Smaller dishes means less directivity and lower gain, but also > less wind load and visibility. Neither one is "better" in that > regard; they're just different. And they tend to price out a bit > better than buying a radio and dish separately, but not by much. > >> What I do not like of Ubiquiti is that compared to mikrotik it has much >> less features, for example no mac-ping/mac-telnet or multiple SSID (ok >> you can have multiple SSID if you use the CLI and the linux command line >> and maybe it will be implemented in the future) >> >> Therefore, I really wonder if those 18 vs 23 are real or just what you >> think from your field experience. > Those features are just software and have nothing to do with the gain > of the antenna. It's like comparing horsepower of a car's engine > with the comfort of the seats. Personally I don't think the radio > unit itself should do more than pass along Ethernet frames > transparently, and respond to management, but since everybody's > working from a Linux kernel and that already has lots of other > capabilities, people expect their radios to also be routers. > > > -- > Fred Goldstein k1io fgoldstein "at" ionary.com > ionary Consulting http://www.ionary.com/ > +1 617 795 2701 > > _______________________________________________ > Wireless mailing list > [email protected] > http://lists.wispa.org/mailman/listinfo/wireless _______________________________________________ Wireless mailing list [email protected] http://lists.wispa.org/mailman/listinfo/wireless
