aaron_do wrote on Nov 15th, 2006, 4:46am: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...
I think this refers to ETSI (European telecommunications standards institute) spec EN 300 440.
aaron_do wrote on Nov 15th, 2006, 4:46am: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?
Best thing here is to benchmark with the competition:
Try looking at datasheets from:
NordicVLSI
Chipcon
Jennic
etc.
cheers
aw