From: Alex S. <ale...@gm...> - 2011-10-18 22:01:02
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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 |