This blog post at aerohive has good info on determining transmit power on devices. Interesting that the report lists different power levels at different frequencies.
http://blogs.aerohive.com/blog/the-network-revolution/apple-ipad-3-and-other-mobile-device-wi-fi-output-power -- Jason Watts Pratt Institute, Academic Computing Senior Network Administrator Sent from my iPhone > On Dec 12, 2013, at 1:54 PM, "Turner, Ryan H" <[email protected]> wrote: > > Things like iPhones are a lot lower than 25 mW. Closer to 17. > > Ryan H Turner > Senior Network Engineer > The University of North Carolina at Chapel Hill > CB 1150 Chapel Hill, NC 27599 > +1 919 445 0113 Office > +1 919 274 7926 Mobile > > From: The EDUCAUSE Wireless Issues Constituent Group Listserv > [mailto:[email protected]] On Behalf Of Dan Brisson > Sent: Thursday, December 12, 2013 1:39 PM > To: [email protected] > Subject: Re: [WIRELESS-LAN] WiFi planning > > Coming in a little late on this thread, but Tristan brings up an excellent > point. We are dealing with multiple areas in our dorms where AirMagnet > Survey with the AirMagnet a/b/g/n card had a much better RSSI/SNR than the > student with an iPad or iPhone has. What we should have done when surveying > was to turn down the TX power to something like 25mW, which would more > closely mimic a tablet or smartphone. > > We are in need of a survey tablet upgrade and currently looking at a Dell XPS > with the built-in Intel® Dual Band Wireless-AC 7260 since that appears to > have direct support within AirMagnet. But I'm considering also purchasing > something like a Nexus 5 smartphone and using that along with the tablet to > check RSSI. I would prefer to use an iPhone since that's what the majority > of students have, but from what I can tell there's still no decent App that > will give RSSI values. > > Curious what folks think of that strategy. Hopefully this is close enough to > the main topic to not be considered hijacking. I had been meaning to get an > email out on this topic. > > Thanks, > -dan > > > Dan Brisson > Network Engineer > University of Vermont > (Ph) 802.656.8111 > [email protected] > On 12/11/13, 5:38 PM, Tristan Gulyas wrote: > Hi all, > > What device or test equipment is being used for the RSSI value? If we see > -65dBm on a Fluke AirCheck, we’re lucky to get -72dBm on an Intel 5100 in an > HP laptop, as an example. We’d like to pick a specific device, eg, an iPad > and create standard measurements on such a device so the customer is > empowered to report a fault based on data they have available. > > Tristan > > > > > On 12 Dec 2013, at 8:27 am, Barros, Jacob <[email protected]> wrote: > > > We are going into dorm rooms over winter break to review ap placement. Do > any of you have a policy (written or unwritten) that sets a minimum RSSI for > a space? For example, if the RSSI is -65 or lower then you shuffle or add an > ap to the area? > > > > Jake Barros | Network Administrator | Office of Information Technology > Grace College and Seminary | Winona Lake, IN | 574.372.5100 x6178 > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/groups/. > > > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/groups/. > > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/groups/. > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
