You also need to certify for CE/UL which is in part the power system. 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 Sam Tetherow Sent: Wednesday, June 28, 2006 2:05 PM To: WISPA General List Subject: Re: [WISPA] $100 CPE? Not that I disagree with your statement about cheap equipment and getting what you pay for, but the uncertified comment doesn't make any sense. You don't certify a POE, you certify the radio and antenna, or am I missing something here? Sam Tetherow Sandhills Wireless Charles Wu wrote: >Cheap Taiwanese / Chinese / Foreign products also contain other "hidden >costs" -- let's think conspiracy theories here =) > >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... > >-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/
