----- Original Message -----
Sent: Tuesday, July 01, 2003 9:35
PM
Subject: RE: [smartBridges] Only getting
300K from Ranchos Access Point
OK, one last
thing on the amp and then an actual answer to help my fellow
WISP'er.
Remember when calculating your total output that the FCC only
allows 36dBm EIRP (4 watts)! Transmitted power must be configured correctly to
prevent potential interference problems due to the effective isotropic
radiated power exceeding the limits as defined in FCC part 15.247(i). As
defined in FCC part 15.247(i), the power transmitted by the transmitter can
only have a maximum power level of 1 watt or 30dBm. The antenna can only have
a maximum gain of 6dBi. If the power at the transmitter is lowered by 1dB, the
antenna gain can be increased by an additional 3dB. For example, if an
installation reduced power at the transmitter to 29dBm, it could use an
antenna having a gain of 9dBi. In general, for every 1dB power reduction at
the transmitter from 30dBm, an installation can add 3dB gain at the antenna. A
breakdown of transmitter versus antenna gain is as follows: 30dBm transmit -
6dBi antenna ... 29dBm transmit - 9dBi antenna ... 28dBm transmit - 12dBi
antenna ... 27dBm transmit - 15dBi antenna ... 26dBm transmit - 18dBi antenna
... 25dBm transmit - 21dBi antenna ... 24dBm transmit - 24dBi
antenna
Your 5Watt amp
translates to 37dBm on its own without the radio or
antenna.
But back to your
problem with speed. Change the mtu size on your clients to something higher
than factory Microsoft, and set the Fragmetation Threshhold to about 1496
(play with this setting to get the best result)
Please be weary
of uncle Charley, he may pay us all a visit when we least expect
it.
John
Mooring
Ahh buh humbug im putting up 20db 120 sectors with 750mw
amps and smartbridges at max output :) Lets see my competitors talk over
that since they liked causing too much noise before MUHAHAHAHAA although I
am not in the US so its kewl :)
Try simplespeed, is that kB or kb if its kb then im not sure
what could be wrong, whats the speed from the APPO to the noc have u tested
this throughput?
Chris
-----Original Message-----
From:
Jerry Bacon [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, July 01, 2003 10:25 PM
To: [EMAIL PROTECTED]
I don't see how you can be within legal limits. The amp
output is +27dBm and
the antenna adds 14dB to that
giving you an EIRP of about +41dBm less the
cable
losses. Seems to me that it's about 4 or 5dB over the limit.
--
Jerry B.
"The optimist proclaims that we live in the best of all
possible worlds, and
the pessimist fears this is
true." - James Cabell
----- Original Message -----
The power on the radio is set to stay within legal
limits.
The PART-15.ORG smartBridges Discussion List
To Join: mailto:[EMAIL PROTECTED] (in the
body type subscribe smartBridges <yournickname>
To Remove: mailto:[EMAIL PROTECTED] (in the
body type unsubscribe smartBridges)
Archives: http://archives.part-15.org
