On Apr 22, 2004, at 7:20 PM, Jim Thompson wrote:
If its FCCID: PGR2WHPLHW, (which is, btw, an older certification), then they claim (and tested) 26.02dBm of tx power into a 2dBi antenna, for 633.9mW EIRP. This is the 400mW unit.
I forgot to add that this unit shows a real lack of understanding of RF. Its senseless to have this much downlink power when the client's will have (much) less. Even a 100mW Cisco card will be 6dB down, with Agere and other cards perhaps 10dB down.
So the AP sends a packet at 11Mbps, it gets through, and the client ACKs (likely at 2Mbps, but lets not get into that just now.)
The the client (STA) wants to send a packet, It 'knows' that the AP got through at 11Mbps, so it attempts at 11Mbps, doesn't get an ACK, retries N times, then starts to fall-back. In the worst-case scenerio, it succeeds at 1Mbps, and receives an ACK for its trouble.
Then, sometime a short while later, the AP downlinks again (successfully) at 11Mpbs, and the whole thing starts over, since, for all the STA knows, the situation that caused the massive fall-back has become (much) better.
(Fortunately, most of the traffic in a home is *from* the Internet, not *to* it.)
Jim
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