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FCC band-edge test for 802.11b, 802.11g and 802.11a

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crenyen

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Can anyone tell me the FCC band-edge test spec. for 802.11b, 802.11g and 802.11a and how to slove the band-edge problem?
Because my AP Router failed in this certification item and I still can not find way to solve this problem.

Best Regard
Thanks
 

biff44

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fcc band edge

Well, basically the power outside of the allowed frequency band exceeded the level specified by the FCC. You make the test with a spectum anlyzer while the wireless card is doing its thing.

You may be missing the spec because:
You are overmodulating, or not filtering the transmitted signal (usually digitally filtered) enough
You need a tighter RF filter somewhere
You are overdriving the output amp and it is generating spectrum regrowth
Your center frequency might be drifting too low or high, and spilling energy out-of-band
You could have mistakenly programmed the wireless card to use a frequency outside of those allowed in the US
 

venu.gongal

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Re: FCC band-edge test

Hi Biff

How are the Band edge conducted emissions measured??

Can we compare Band edge Conducted emissions and Radiated emissions??
 

FvM

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FCC band-edge test

Conducted emíssions are measured up to 30 MHz according to most EMC standards, they are typically not a problem
with GHz wireless devices, and also not related to band edges. Generally, detailed measurement methods are specified
in all respective standards (FCC, ETSI, EN).
 

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