Mike Connors wrote:
> Tim Wescott wrote:
>   
>> Wireless = radio, radios are frequency sensitive devices, and 
>> frequencies shift with temperature.
>>
>> Is 15 F a problem?  I dunno.  That's what testing is for -- do you think 
>> your router was tested at 15F?
>>
>> someone wrote:
>>   
>>     
>>> Is 15 degrees fahrenheit too cold for the typical linux router built using 
>>> an
>>> old computer?  I imagine the cold is good for hard drives and it keeps  
>>> the electronics cool.
>>>       
> There's good scientific data on the effects of snow, rain, clouds, and fog
> RF waves. Not so much with temperature & humidity. I have noticed when either
> my wireless cards or my laptop w. built-in wireless get hot my wireless 
> connectivity
> seems to degrade. What you really need to do is get db readings at diff 
> temps. Maybe take
> one at midnight now during the cold snap and one next week at 12 noon when 
> it's supposed
> to be in the 40's...
>
>   
When I'm not cooking up fancy algorithms or writing software that 
embodies them I'm designing electronic hardware; the basic ground rule 
of any analog circuit design is that you've got to design it for the 
temperature range you want it to work over, test it over the temperature 
range you designed it for, then test samples off of your manufacturing 
line to make sure that everything is still doing what it's supposed to.  
Fail at any one of these three efforts and you're selling your customer 
a crap shoot.

And all that design and test time costs $$.  Unless the FCC has 
temperature requirements no one is going to test -- and the FCC 
generally only really _requires_ you to test for compliance, not operation.

-- 
Tim Wescott
Wescott Design Services
Voice: 503-631-7815
Cell:  503-349-8432
http://www.wescottdesign.com


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