Hi Gord, ? http://www.artemis.com/pcell Be interested to learn if anybody has got under the veil of this one?
Christian Gord Slater wrote: > > > On 9 December 2014 at 13:32, Richard Halfpenny > <[email protected] > <mailto:[email protected]>> wrote: > > On 09/12/2014 11:37, Peter Knapp wrote: > > I spent quite a while on this with a couple of larger multi-vendor WAP > > distributors and they have clients of the big exhibition centres and > > music venues, and they use extremely steerable APs with shielding, much > > as you do with an audio line array if you are familiar, and don’t have > > anywhere near the number of users per AP you are citing. > > +1, the antenna/RF design will make or break this kind of solution. > > > as an RF guy, I approve this message. > > In fact, you might be forced to use "bad antennaes" like leaky feeders > placed in metal troughs or spaced above them as corner reflectors under > a raised floor to get stuff to work best, to limit the numbers of > devices per physical radio. neat.. > > I've had to pick up the total mess of this on several SCADA-type > fitments. It can only be worse for one-off events where failure is not > an option. I had to borrow over 300 humans to move around carrying > sensors to prove one fitment didn't work the way the vendor said it did. > Fine when you have minimum wage people that are bored. Some of the bods > I had to borrow were on 150k+ a year and very pissed off to be in a cold > icy refinery - one of my worst ever site visits; so, so glad I'm > retired from site ops like that now. not geeks then > . > Beamsteering, $latest-craze and "software solutions" are unhelpful above > a certain empirical threshold. You simply cannot break the laws of > physics by even a tiny fraction of a percent. If you do exceed the > *known* laws, please document it, make it repeatable and become rich and > famous. Otherwise, you've been conned :) > see above > -- > sent via Gmail web interface, so please excuse my gross neglect of > Netiquette -- Christian de Larrinaga ------------------------- @ FirstHand ------------------------- [email protected] -------------------------
