RE: [smartBridges] Only getting 300K from Ranchos Access Point

[John Mooring]

Title: 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

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]On Behalf Of phantam
Sent: Tuesday, July 01, 2003 10:30 PM
To: '[EMAIL PROTECTED]'
Subject: RE: [smartBridges] Only getting 300K from Ranchos Access Point

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.

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