My recommendation is for the supplier to provide you with a device that they certify to operate within the scope of their FCC Grant at your specified temp range. In other words, place the ownership of the problem back on the supplier. Let them determine if they need to resumit data to the FCC for the higher temp operation. Richard Woods Sensormatic Electronics Tyco International
From: Burns, Chuck [mailto:[email protected]] Sent: Wednesday, June 11, 2003 11:25 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]
