From: Victhor F. <vic...@gm...> - 2011-10-18 22:08:08
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I have used my COM several times without an antenna. Signal reception is obviously much worse, but with it sitting right next to a router, there's not much change... My COM did die, unfortunately, but not because of this - it fell victim of bad RAM. 2011/10/18 Alex Sartin <ale...@gm...>: > I heard that the wi-fi modules has an potency controller. Its job is to > sense if the wi-fi signal is weak and increase the wi-fi power. > The job of the antenna is to capture and concentrate the signal between this > controller and the external ambient. > If you don't have the antenna connect, in order to has a stable and "strong" > connection the signal controller will increase its power until it get the > good signal. But without the antenna this might never happen. > Some possible effects is that the controller get overload and die !! > I noticed in my overo-board that the temperature without the antenna had > increased ! > Another explanation is that your wi-fi module is expecting an antenna > connect. The antenna is nothing more than an impedance (and resistance). > Without the antenna to complete the circuit (module-antenna) you has no > impedance (or resistance) overloading the circuit. > So by using the wi-fi without the antenna you works with the module's max > power. At some point it would have to give it up and die :// > Another thing: This applies to the bluetooth module as well !!! > I hope I could help, sorry about the english (I was in a hurry). > Alex. > On 18/10/2011, at 19:39, Steve Sakoman wrote: > > On Tue, Oct 18, 2011 at 12:14 PM, bwilkins <br...@ro...> wrote: > > Can anyone out there tell me if powering a WiFi enabled COM such as the Air > > or Fire w/o an antenna is safe? I have a few COMs that were powered on this > > way and the WiFi is fried. Trying to determine the cause. Thanks. > > I often use COMs with no antenna connected and have never had one die on me, > > Steve > > ------------------------------------------------------------------------------ > All the data continuously generated in your IT infrastructure contains a > definitive record of customers, application performance, security > threats, fraudulent activity and more. Splunk takes this data and makes > sense of it. Business sense. IT sense. Common sense. > http://p.sf.net/sfu/splunk-d2d-oct > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > ------------------------------------------------------------------------------ > All the data continuously generated in your IT infrastructure contains a > definitive record of customers, application performance, security > threats, fraudulent activity and more. Splunk takes this data and makes > sense of it. Business sense. IT sense. Common sense. > http://p.sf.net/sfu/splunk-d2d-oct > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > |