Hello, Pablo. You wrote 19 ������ 2002 �., 23:18:52:
>>> >> Senao 200mW >>> ^^^^^ >>> Really 60... 100mW PBB> I tested a couple of cards with an spectrum analyzer and them had a 20/21 PBB> dBm output power. quite right. These cards Senao SL2511 = Z-com XI-325, are made on Prsim2.5, power where that in 2 times is higher than series XI-300 PBB> The cards are installed with coolers to prevent a drop power problem that I PBB> read about the Senao cards. >>> >> 24dBi antennas >>> Grid ? PBB> Yep. >>> >> 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 PBB> I don't need to do that, because the boards work on 11M and stay there PBB> without problems, the Senao sensitivity is -89 at 11M. PBB> Anyway, I try on 1, 2 and 5.5: same problem. PBB> Change RTS values: same problem. PBB> Change maximum number of retransmission: a liiittle better, go up from 0.08 PBB> to 0.3 MBit (wow! :). >>> >> Senao 200mW >>> >> 1W amplifiers >>> PC_card 200mW + 1W amplifier NEVER use !!!!! >>> Amplifier is overloaded !!! PBB> We are using Teletronics amplifiers, and they supports up to 23dBm on the PBB> input. PBB> And we are throttling down the transmit power a little. PBB> Really, I don't believe that this be an RF problem. PBB> Do you know anyone that have a >35km link with Prism chipset, without PBB> special firmware or drivers? Yes, I have clients, they use: Linksys WMP11 (on Prism2.5) + 1 watt amplifier + 27 db Grid antenna on a distance of 106 km. Before for them were used some PCI Cisco cards , but over stupid artificial delay there was very low speed, though link-energy was normal PBB> And of course, with a sustained >2Mbit bandwidth. Real transfer ~2 mbps -- WBR, Andrey http://www.wavelan.ru info@*DEL*wavelan.ru -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
