Anders -
The primary purpose of restricting co-location is related to rf exposure. The individual grants allow for use of the devices based on (typically) a calculation of the rf exposure. Adding a second transmitter increases the rf exposure and may require an increased minimum separation distance between the antennas and people. If the two modules do not share a antenna and cannot operate at the same time then they are not co-located. Also, if the antennas for the modules have adequate separation (typically 20cm, but it could be more if the individual modules require a greater distance) they are not considered co-located and you can use the modules without having to obtain additional approvals. There are a three options that come to mind with getting the device approved with both modules operating together: The first is to contact the module manufacturers and see if they can file a change with the FCC to allow co-location of module A with module B (and vice versa) in your specific host system. Both grants would need to allow co-location with the other device in your host system. The FCC IDs for the each module would need to be displayed on the outside of the device. The second is to work with the module manufacturers to obtain an FCC ID under your company name for each module to allow co-location in your host device. Typically the modular approval would then be limited to allowing installation in devices you make and limited to specific host systems. The FCC IDs for the each module would need to be displayed on the outside of the device. The third is to obtain a grant for your device that covers both the modules. You would have only one FCC ID for your product covering both modules. For all 3 cases you would need to re-evaluate radiated emissions for both modules in your device, possibly AC conducted emissions and re-evaluate the rf exposure of the combination device. Direct measurements on the rf port for power, bandwidth etc etc could be taken from the original module reports. You will need to obtain instructions to place the module into suitable test modes. If you are looking for Industry Canada approval life is a little easier since there will be no co-location restriction (assuming both modules have modular approval under Industry Canada's certification scheme). This is because Industry Canada leave rf exposure to the manufacturer ... so you would need to evaluate rf exposure for the end product and provide appropriate warnings to the end user. Good luck - using pre-approved modules can make life easier, but only if you can use the modules without breaking any of the restrictions ! Mark At 01:18 AM 1/8/2008, Anders Svensson B wrote: Dear experts, I have found that the FCC grants (FCC part 15) for WLAN modules and GSM modules have a restriction that says that they must not be co-located with other antenna or transmitter. In our coming product we have two modules which is co-located, how do we solve this problem? Our thoughts right now is to use the modules FCC grants and do a FCC Self Declaration for the transmitting part for our units (i.e. no own FCC id for our product). For my understanding: Why do the modules FCC grants have this restrictions? Can the manufacturer update the FCC grants without this restrictions and that are needed for that? Have we any more solutions to solve this? Any inputs is very much appreciated Thanks Regards Anders - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: <http://www.ieee-pses.org/> http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: <http://listserv.ieee.org/request/user-guide.html> http://listserv.ieee.org/request/user-guide.html List rules: <http://www.ieee-pses.org/listrules.html> http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: <http://www.ieeecommunities.org/emc-pstc> http://www.ieeecommunities.org/emc-pstc - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
