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?
>>
>>
>>
>>    
>>
>--
>
>
>  
>

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