Ivan This is a timing issue 802.11b start to have real problems after 13-15 miles because of the ACK time out issues. I have seen this before and one of the reason we use the TurboCell protocol.
Sincerely Tony Morella Demarc Technology Group Office: 908-996-7995 Cell: 908-246-9170 Fax: 908-847-0202 email: [EMAIL PROTECTED] http://www.demarctech.com Open Chat Server http://www.demarctech.com:8000 Yahoo IM: tonymorella Wireless Solution Provider > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]] On Behalf Of Ivan Korshun > Sent: Wednesday, November 20, 2002 8:12 AM > To: [EMAIL PROTECTED] > Cc: Pablo Berra (Bawug) > Subject: Re: [BAWUG] Long range link problem > > > > >> >> Senao 200mW > > >> ^^^^^ > > >> Really 60... 100mW > > I tested a couple of cards with an spectrum analyzer and them had a > > 20/21 dBm output power. > ^^^^ > 100 ... 125 mW > > > >> >> 24dBi antennas > > >> Grid ? > > Yep. > > The antenna directional characteristic should not concern a > surface, if Grid that it is impossible, multipatch :( Also > are impossible 5.5M and 11M .... > > > > >> >> 72m & 60m towers > > >> Rx_level = -115 -20Log(36) +20 +24 +24 = -78 dBm > > >> Use only fixed speed, > > >> for example: only 5.5M or 2M or 1M > > I don't need to do that, because the boards work on 11M and > stay there > > without problems, the Senao sensitivity is -89 at 11M. > Anyway, I try > > on 1, 2 and 5.5: same problem. > > Now works link@41km 80Kbyte/sec OR 0.8 MBit > GL2411AP,Antennas -> Grid, multipatch ... > > > Change maximum number of retransmission: a liiittle better, > go up from > > 0.08 to 0.3 MBit (wow! :). > > multipatch ... > > > >> >> Senao 200mW > > >> >> 1W amplifiers > > >> PC_card 200mW + 1W amplifier NEVER use !!!!! > > >> Amplifier is overloaded !!! > > We are using Teletronics amplifiers, and they supports up > to 23dBm on > > the input. And we are throttling down the transmit power a little. > > Ok !! > -------------------------------------------------------------- > The built-in dynamic power sensor in SmartAmps adjusts > the Radio Frequency (RF) power output level by reading the > input signal power. > -------------------------------------------------------------- > > Really, I don't believe that this be an RF problem. > > It is a problem RF, multipatch ... > > > > Do you know anyone that have a >35km link with Prism > chipset, without > > special firmware or drivers? And of course, with a sustained >2Mbit > > bandwidth. > > Told about such link, > however I did not see by their eyes. > > Regards, > Ivan Korshun > http://www.vector.kharkov.ua > > > > Thanks! > > > > Regards, > > Pablo. > > > > -- > > general wireless list, a bawug thing <http://www.bawug.org/> > > [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless > -- > general wireless list, a bawug thing <http://www.bawug.org/> > [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless > -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
