David, You are right SAR could be required for this unit as well as MPE. Here is part of the oet 65 c.
'Mobile devices may also be evaluated with respect to the SAR limits given in Appendix A for RF exposure compliance, but in such cases it is usually simpler and more cost-effective to evaluate compliance with respect to MPE limits based on field strength or power density." The question is would this unit be considered as mobile or portable unit? From: David Seabury [mailto:[email protected]] Sent: Thursday, August 14, 2003 11:55 AM To: Rachid Sehb; [email protected]; [email protected] Subject: Re: FCC Human Exposure Limits The 20cm "rule" in OET65 Supp C applies to operating distance from the body, not between the transmitters. If the 20cm rule applies, then the FCC requires SAR whether it is a fix, mobile or portable device. David Seabury From: "Rachid Sehb" <[email protected]> To: <[email protected]>; <[email protected]> Sent: Thursday, August 14, 2003 10:32 AM Subject: RE: FCC Human Exposure Limits > > Hello Richard, > > If the device fall into the criteria of " mobile", an RF exposure evaluation > would be required. Since you would have two radio collocated, by less than > 20cm from each other in the same unit, an MPE evaluation would be required. > You would need to show compliance to the whole body exposure, with 2.4Ghz on > and 915Mhz off, and vice versa, and finally with the two units ON. > > Sincerely, > > > > > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] > Sent: Thursday, August 14, 2003 9:42 AM > To: [email protected] > Subject: FCC Human Exposure Limits > > > > Consider a handheld wireless device operating in the 915 MHz band or 2.45 > GHz band. Do I understand correctly that such a handheld device where the > radiating elements are expected to be at least 20 cm from the head and torso > of the body is considered to be a "mobile device" by the FCC, and thus it is > sufficient to demonstrate compliance by whole body exposure using the > spatially averaged field? > > Richard Woods > Sensormatic Electronics > Tyco International > > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: [email protected] > Dave Heald: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > Archive is being moved, we will announce when it is back on-line. > All emc-pstc postings are archived and searchable on the web at: > http://www.ieeecommunities.org/emc-pstc > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: [email protected] > Dave Heald: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > Archive is being moved, we will announce when it is back on-line. > All emc-pstc postings are archived and searchable on the web at: > http://www.ieeecommunities.org/emc-pstc > This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
