Hi Chuck, The device in question would fall under 15.247, which has no extreme temperature requirement in the U.S. If the WLAN device was tested for use in the EU the European Norm (EN 300 328) does involve extreme temperature testing of -20 to +55 C, unless it is for indoor use or controlled environment only, in which case they would still have to test from 0 to + 35 C. If it is a plug in device for use in a host system, the standard only requires that the WLAN device meet the temperature extremes declared for the host system. I hope that you find this info helpful. Best Regards, Barbara
From: Burns, Chuck [mailto:[email protected]] Sent: Wednesday, June 11, 2003 8:25 AM To: [email protected] Subject: FCC and Hi Temp operation Hello, everyone. We are integrating a purchased 802.11b device into our product, but face ambient temperature requirements up to 80 degrees C. This brings up two problems: 1. Will it work at that temperature? One vendor advertises 55 degrees max, another 70 but with an offer to "screen" products at 80. 2. What are the FCC requirements? The FCC Rules for the 2.45 GHz band, 15.249, specify a frequency tolerance of 0.001% over the -20 to +50 degree range, but do not specifically address higher temperatures. Do we simply fall back onto the more general provisions of 15.215, keeping the 20dB bandwidth signal within the designated band, with a recommendation to keep it within the central 80% of the permitted range? Since we are not manufacturing the transmitter, which already carries FCC certification, who is responsible to the FCC for ensuring compliance at our extreme temperature? Regards, Chuck Burns Manager of Compliance Cubic Transportation Systems, Inc. 5650 Kearny Mesa Road San Diego, CA 92111 Tel.: (858) 627-4562 Fax: (858) 292-9987 [email protected]
