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

Hi aw,

thanks a lot

Aaron