Permissive Change Letter

FCC ID: MRXC4W4MA4

Cover Letter(s)

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FCCID_2842583

Willow Run Test Labs, LLC 8501 Beck Road, Building 2227 Belleville, Michigan 48111 USA Tel: (734) 252-9785 Fax: (734) 926-9785 e-mail: info@wrtest.com Attn.:Certification and Engineering Bureau, Industry Canada 3701 Carling Avenue, Bldg. 94 Ottawa, Ontario K2H 8S2 Re: Certification for Schrader Electronics C4W4MA4 IC: 2546A-C4W4MA4 Please find enclosed application materials for certification of Schrader Electronics C4W4MA4. We tested it and found it to comply with IC RSS-210/GENe. Current Variants: There is only a single model of the EUT, as tested. History: Original Grant: Jan, 2009; FCC ID: MRXC4W4MA4; IC: 2546A-C4W4MA4, Model: C4W4MA4. Changes Made: A software change is being made to the ASIC along with a PCB layout change and digital component change in order to accommodate the shock sensor using differential signals on the existing ASIC pins. No change to RF section of the PCB is intentionally being made, however output match re-tuning was required due to the PCB layout change resulting from the shock sensor change. A Class II permissive change is performed here to demonstrate ongoing compliance. Action Taken: The EUT employing the new PCB layout is fully tested. The changes made qualify as a permissive change for IC (ref. IC RSP-100). If there are any questions regarding the application or testing performed, please contact us at the above address or call (734) 252-9785, or e-mail info@wrtest.com. Sincerely, Joseph D. Brunett Willow Run Test Labs, LLC 11

Willow Run Test Labs, LLC 8501 Beck Road, Building 2227 Belleville, Michigan 48111 USA Tel: (734) 252-9785 Fax: (734) 926-9785 e-mail: info@wrtest.com Attn.:Federal Communications Commission Equipment Approval Services P.O. Box 358315 Pittsburgh, PA 15251-5315 Re: Certification for Schrader Electronics C4W4MA4 FCC ID: MRXC4W4MA4 Please find enclosed application materials for certification of Schrader Electronics C4W4MA4. We tested it and found it to comply with CFR Title 47, Part 15.231(a,e). Current Variants: There is only a single model of the EUT, as tested. History: Original Grant: Jan, 2009; FCC ID: MRXC4W4MA4; IC: 2546A-C4W4MA4, Model: C4W4MA4. Changes Made: A software change is being made to the ASIC along with a PCB layout change and digital component change in order to accommodate the shock sensor using differential signals on the existing ASIC pins. No change to RF section of the PCB is intentionally being made, however output match re-tuning was required due to the PCB layout change resulting from the shock sensor change. A Class II permissive change is performed here to demonstrate ongoing compliance. Action Taken: The EUT employing the new PCB layout is fully tested. The changes made qualify as a permissive change for FCC (ref. FCC, Part 2, 2.1043(a)(1)).If there are any questions regarding the application or testing performed, please contact us at the above address or call (734) 252-9785, or e-mail info@wrtest.com. Sincerely, Joseph D. Brunett Willow Run Test Labs, LLC 10


Document Created: 2015-12-05 17:00:04
Document Modified: 2015-12-05 17:00:04
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