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https://designers-guide.org/forum/YaBB.pl Design >> RF Design >> blocker requirements https://designers-guide.org/forum/YaBB.pl?num=1163594821 Message started by aaron_do on Nov 15th, 2006, 4:46am |
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Title: blocker requirements Post by aaron_do on Nov 15th, 2006, 4:46am Hi all, I have some questions about intermodulation/blocker requirements. I read a paper on building a 802.15.4 compliant receiver, and the author listed the 802.15.4 specs. Some of them such as NF were calculated using the 802.15.4 standard's specs, and some of them such as minimum sensitivity and adjacent/alternate channel rejection were given by the 802.15.4 standard. Anyway one of the specs was blocker level (-30 dBm), but when i read the 802.15.4 standard i found no mention of any blocker requirement. Does anybody know how blocker level is found? This -30 dBm blocker level imposes stricter requirements on the receiver linearity than the adjacent/alternate channel rejection... Also, since the receiver must co-exist with other 2.4 GHz devices (Bluetooth etc) is it common practice for the receiver to be designed with stricter blocker requirements than those specified in the 802.15.4 standard? thanks in advance, Aaron |
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Title: Re: blocker requirements Post by ACWWong on Nov 15th, 2006, 7:08am aaron_do wrote on Nov 15th, 2006, 4:46am:
I think this refers to ETSI (European telecommunications standards institute) spec EN 300 440. aaron_do wrote on Nov 15th, 2006, 4:46am:
Best thing here is to benchmark with the competition: Try looking at datasheets from: NordicVLSI Chipcon Jennic etc. cheers aw |
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Title: Re: blocker requirements Post by aaron_do on Nov 15th, 2006, 5:56pm Hi aw, thanks a lot Aaron |
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