Wireless Security
max transmit powers Aug 01 2011 09:19PM
Robin Wood (robin digininja org) (1 replies)
Re: max transmit powers Aug 03 2011 04:57PM
Richard Farina (sidhayn gmail com) (1 replies)
Re: max transmit powers Aug 04 2011 02:15PM
Robin Wood (dninja gmail com) (1 replies)
Re: max transmit powers Aug 04 2011 02:59PM
Richard Farina (sidhayn gmail com)
On 08/04/11 10:15, Robin Wood wrote:
> On 3 August 2011 17:57, Richard Farina<sidhayn (at) gmail (dot) com [email concealed]> wrote:
>> On 08/01/11 17:19, Robin Wood wrote:
>>> Two questions here, first, whats the best way to find out the maximum
>>> transmit power of any given card? I assumed it would be on the FCC
>>> site but for one of my Alfa cards, a awus036eh, last time I searched
>>> their database I managed to find a card with the same id but the photo
>>> and spec was completely different. Now I'm trying to find it again I
>>> can't even find that one.
>> https://fjallfoss.fcc.gov/oetcf/eas/reports/GenericSearch.cfm
>> Search for the fcc id not the card name.
> Whats the best way to find the FCC ID? I've got the following card:
> http://www.wikidevi.com/wiki/ALFA_Network_AWUS036EH
> and can't find an FCC ID for it anywhere.
It should be on a sticker on the card, but being that you are not US
based it may not be since it's sorta not required for you. The best I
can suggest (unless someone else has the card and can provide the fccid)
would be to search for grantee code UQ2 which is Alfa Networks and go
through the list for things that might be it and check the users guide
download link or the external pictures link to confirm. It's a bit
annoying, but my google skills failed me when looking for the fccid so
that leaves less desirable choices.

Good luck.

> I'm only after this information so I know how it all works, I've not
> had a time where I've needed to crank up the power beyond anything
> that the defaults will allow and I've got some good antennas if I need
> to.
> Robin
> PS I know the card is a 200mW, just using it as an example.
>>> And second, what is the risk of increasing the transmit power beyond
>>> the level the card is designed to run at? Will the cards cap
>>> themselves and just run to their maximum or will they try to go higher
>>> than they should and potentially burn out or fail? Or is it a mix of
>>> both?
>> Often people believe the max tx power of a card was chosen just because of
>> regulatory limitations, however it is also very likely that the max tx power
>> was chosen because after that the signal degrades or the card gets damaged.
>> Realistically, the max tx power of the card should not be exceeded because
>> the signal will almost certainly degrade significantly, and you have the
>> potential for damaging the card. There were many reports of people using
>> the hipower patch for that awus036h that experienced card issues, failures
>> transmitting, and even buzzing sounds after very short usage. If you need
>> more tx power, buy a better card, or a good amp.
>> -Zero_Chaos
>>> Robin
>>> PS I'm thinking a lot about wifi at the moment, can you tell?

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