Hy all.
I have a 3W amplifier (802.11b) buyied from HyperlinkTech (USA), and I want to make a public hotspot with a RB112. The problem is: what mPCI should I use? Which is the best for my use? Consider that I have 12m Aircom Plus (-3dB approx) from the RB112 to a omnidirectional antenna, and I’d like to try the 802.11g mode (no 802.11a, absolutely), so I need a powerful mPCI (with 802.11g I can’t use my amplifier).
Which can I use? I can easily buy one of these cards:
WLM54G23 / High Power Atheros 23dBm 802.11b/g
CM9 / Wistron Neweb Atheros 802.11a/b/g
SR2-80211bg / Ubiquiti Super Range 2 400mw 802.11b/g
NMP-8602 / Senao Atheros High Power 26dbm
NL2511MP / Senao Prism 2.5 802.11b 200mW
I think (from technical detail) that the Ubiquiti SR2 is the best choice for me, but I’d like to have an impression from REAL user as I know I can find on this forum.
and found both to be good cards although the NL2511MP will not do WDS.
Choosing the right antenna is critical for creating a good hotspot. The last one we built was in a small country hotel using a RB532 in metal case and 2 MikroTik plastic antennas connected to a single NMP-8602 ETSI. It works great!
ah..i thought you were trying to serve wifi laptop customers like at a hotel or something…
in the case above i suggest using an sr2 as i used to have quite a few weird issues on the client side with 8602…they are very suspectable to noise…i had a 8602 serving wifi clients and every time the 2.4ghz cordless phone would right, all users would get disconnected and not come back for a minute or two or more… trying another 8602 did not help…put in a sr2, no issues!
if you are doing PtP then the 8602 should be good, just look for some specific posts from ppl who have experience with that linksys unit on the client side.
eiter way i have always found the SR2 to be better than the 8602…but you pay almost twice as much
I have a lot of experience on Linksys WRT54G/GS/GL unit. The only remain thing was the choice of the mPCI card that will serve this PtMP link (ALL client are static and WRT54G/GL unit). I asked info on SR2 because I readed somewhere on this forum that these mPCI aren’t as good as declared on the receive section.
NMP-8602 / Senao Atheros High Power 26dbm (( dont think about it the worest card ever i tried very veyr veyr veery very very very bad cardddd))
i think in your case the AMP is the best
example :
we are doing small village with 1 watt amp with regular AP (hyperlink omni 15 db)
client is connected and browsing from normal toshiba laptop the AP @ ditance 10km we reach (clear line of sight)
with senao max we got 1.2 km (with disconnection also)
@ 700 meter we doing a test
SNR we got in laptop side 5 db with the AP+ amp we got 27 db
anyway i have 3 mpci senao new im ready to replace it with 1 SR2 if anyone accept
The amplifier is directly connected to the mPCI (20cm pigtail), so I don’t think the noise are too great…
Why their TX are killed? In 802.11a/b/g the access method to the layer 2 is CSMA/CA, so, when someone “speak”, all other listen only.
But, if you are convinced, can you explain to me why the TX of a GSM base station is much more greater than a GSM mobile? It’s not seem to be a bad quality on voice call, and they using amp!
I think that nobody in this forum has seen a setup where an Amp has improved the conditions. Only the opposite. At least that’s what I think after reading this forum for more than a year
Normis, I’ll take yours (and other user too) suggestions in great consideration. I don’t want to start a flame, becouse my final intention is to setting up my hotspot without the amplifier. On my first post I wrote:
and I’d like to try the 802.11g mode (no 802.11a, absolutely), so I need a powerful mPCI (with 802.11g I can’t use my amplifier)
I’m waiting for a CM9 (I buyed it becouse SR2 was out of stock when I made the order on my dealer). I’ll use it with the amplifier (spec says 802.11g/54Mbps at 13dBm, and with 3dBm attenuation for cable + connectors loss + 12dBi antenna I will give only 22dBm EIRP) until the SR2 will be available again on my dealer. I made a 3-days test with R52+amp, “b only” mode, and the link was up and running with no problem at all, then, I gave back R52 to my friend.
In any case, I’ll wrote again on this thread with updated info on CM9/SR2 with and without 3W amp.
