----- Original Message ----- From: "Charles Wu" <[EMAIL PROTECTED]> To: "'WISPA General List'" <[email protected]> Sent: Wednesday, June 28, 2006 10:37 AM Subject: RE: [WISPA] $100 CPE?
> Cheap Taiwanese / Chinese / Foreign products also contain other "hidden > costs" -- let's think conspiracy theories here =) Name for me any provider of WISP equipment that isn't "foriegn"? No matter the brand, everything is pretty much assembled somewhere else. Now, I'm not trying to equate all things imported, or that there isn't huge differences in quality between something from say... Alvarion and some Chinese knock-off of something that already started out cheap. > > There was a recent thread (on this list?) about Mikrotik RB532 boards > spewing <1 Ghz OOB Noise when being powered w/ -48 VDC PoE (a faulty / cheap > regulator -- wasn't following that closely) -- effectively taking down some > ambulance communications service / etc > > What would happen when the DIY WISP deploys such a system -- and takes down > some critical communications system, and on the extreme end, someone dies as > a result of this -- then they investigate and you realize that you were > inadvertently interfering w/ them by using an uncertified system... I'm sure there's plenty of examples of unexpected emissions the world over... that seems, I keep reading, to include the PAGER industry. Let's not get carried away here with the "what-ifs". Seriously, I had some half-wit tell me I could not use a cell phone within 50 feet of his gas pumps, due to fire danger. Let's just say he was incredibly annoyed when I laughed at his explanation. I told him that was absurd. There's far more danger from him walking around with hard rubber soles on his shoes. North East Oregon Fastnet, LLC 509-593-4061 personal correspondence to: mark at neofast dot net sales inquiries to: purchasing at neofast dot net Fast Internet, NO WIRES! ---------------------------------------------------------------------------- - > > -Charles > > > ------------------------------------------- > CWLab > Technology Architects > http://www.cwlab.com > > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of [EMAIL PROTECTED] > Sent: Wednesday, June 28, 2006 11:08 AM > To: 'WISPA General List' > Subject: RE: [WISPA] $100 CPE? > > > I am sure Charles and some are you are thinking the same thing I am on the > 400mW unit, something just does not add up when manufactures are doing the > same power and the cost of the card is the more then the cost of the full > unit! I have not see this exact board but I have see a RTl8186 design that > looks just like this one that's 80mW-100mW where the software was changed to > output 400mW. When you use a basic power meter the "AVERAGE" power was 400mW > but this is a false positive. With this setup the true power output of the > DSSS channel did not go up very much. What did go up was the side lobes (2nd > to 5th!) where on channel 6 it took up a full 70Mhz where is can only use > 20Mhz! An basic average power meter looks at the full band when taking a > power reading which is confusing if you do not have a SA to back up the > info. > > Look at the spec what did no look right was the power output of the OFDM > (13.5dBm) vs. the DSSS (26dBm). If they where using a PA is would amp both > in DSSS and OFDM modes equally, which is why I think they are just changing > the firmware to increase the power on DSSS only. Looking at all the RTL8186 > designs I have seen over the past 24 months 13.5 OFDM is 18-20dBm DSSS not > 400mW > > We will have to wait in see what the true case is, most of the WISP that > have been in this for a year or so have some type of SA and can do a basic > level test to see for themselves. We of course plan on getting one and doing > our own level of testing using high end Agilent to test QAM, spectral mask, > EVM etc and see what this unit truly is. > > Bottom line if this is a software patch and not designed to a true 400mW its > going to adversely effect WISP network in a major way. > > Sincerely, Tony Morella > Demarc Technology Group, A Wireless Solution Provider > Office: 207-667-7583 Fax: 207-433-1008 http://www.demarctech.com > > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of Charles Wu > Sent: Wednesday, June 28, 2006 10:32 AM > To: 'WISPA General List' > Subject: RE: [WISPA] $100 CPE? > > And don't forget that it's WiFi vs. a proprietary engineered outdoor WISP > protocol > > -Charles > > ------------------------------------------- > CWLab > Technology Architects > http://www.cwlab.com > > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of Travis Johnson > Sent: Tuesday, June 27, 2006 11:23 PM > To: WISPA General List > Subject: Re: [WISPA] $100 CPE? > > > That they are working on "developing" a new product that will have bugs, > hardware issues, etc. for the first 6-12 months. Trying to get to $100 > (without antenna, BTW). > > Trango has a $149 unit that is from a company that is established, it has a > built in antenna, PoE, etc. and is ready to go today. For $30 more, the > range goes from 3 miles to 13 miles. ;) > > Travis > Microserv > > Brian Rohrbacher wrote: > > > http://www.dslreports.com/forum/remark,15749577 > > > > http://www.dslreports.com/forum/remark,16364972 > > > > > > > > What does everyone think? > > > > > > > -- > > > -- > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > > -- > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ -- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
