Conformity 2008 Engineers' Reference Guide

EMC 10 dB (roughly a factor of 3) more lenient. The rationale for this difference is based on the anticipated mean distance separating potential interferences sources and victims (i. e., receivers of interference), which is expected to be larger in a non-residential setting. In addition to the major classifications based on location— “A” or “B”—the FCC also pays special attention as to whether or not a Class B device is a personal computer or personal computer peripheral. This attention is reflected in the method of approval. There are three possible methods of equipment approval for devices regulated under Part 15: • Verification • Certification • Declaration of Conformity Table 2 shows which approval method should be used for different types of equipment. For completeness, we have shown the approval routes for all Part 15-regulated equipment, so the approval requirements for non-ITE devices such as receivers are shown. Verification is the approval method for Class A digital devices, Class B external switching supplies, and Class B digital devices which are not PC-related, as shown near the bottom of the table. The “verification” procedure as defined by the FCC matches the common definition of that word. (FCC §2.951 ff.) That is, the manufacturer of “verified” equipment is required to test the equipment to verify that it meets the FCC’s technical requirements, and to ensure that the equipment will continue to meet the FCC’s requirements by being “identical to the unit tested within the variation that can be expected due to quantity production ” If the equipment is subsequently modified in a manner which adversely affects its emissions performance, it must be re-verified. Records identifying the equipment, the tests performed and test reports, and any modifications to the equipment must be maintained for at least two years after the manufacture of the equipment has been discontinued. Certification is a more formal method where approval is granted after an application to either the FCC, or more often, an FCC-approved TCB (Telecommunication Certification Body). The application is a mini-technical file, containing information on the product (photos, block diagrams, internal frequency information), as well as test report data. Equipment Authorization Required Verification Verification Declaration of Conformity or Certification Declaration of Conformity or Certification Certification Declaration of Conformity or Certification Declaration of Conformity or Certification Declaration of Conformity Verification Declaration of Conformity or Certification Declaration of Conformity or Certification Declaration of Conformity Verification Verification Verification Verification Certification Certification Highest frequency used in the device (MHz) Below 1.705 1.705 – 108 108 – 500 500 – 1000 Above 1000 Upper frequency of measurement range (MHz) 30 1000 2000 5000 5th harmonic of the highest frequency, or 40 GHz, whichever is lower Table 1: Upper Frequency of FCC-Required Emissions Measurement Range for ITE Type of Device TV broadcast receiver FM broadcast receiver CB receiver Superregenerative receiver Scanning receiver All other receivers subject to part 15 TV interface device Cable system terminal device Stand-alone cable input selector switch Class B personal computers and peripherals CPU boards and internal power supplies used with Class B personal computers Class B personal computers assembled using authorized CPU boards or power supplies Class B external switching power supplies Other Class B digital devices & peripherals Class A digital devices, peripherals & external switching power supplies All other devices Access BPL Devices Radar Detectors Table 2: FCC Required Equipment Authorization by Device Type 48 Conformity 2008 AnnuAl guide

Table of Contents Feed for the Digital Edition of Conformity 2008 Engineers' Reference Guide

Conformity Engineers' Reference Guide 2008 Contents Letter from the Editor 2007: The Year in Review Company Profiles EMC Requirements for ITE A List of EMC Directive Standards Automotive EMC Standards Standards for Medical Devices EMI Issues in Manufacturing Using Field Probes as EMI Diagnostic Tools Meeting DFS Testing Requirements Selecting an Independent Testing Laboratory Filters PCBs Enclosures Antennas Anechoic Chambers Gaskets Spectrum Analyzers Compliance Software Product Safety SAR Standards Expansion Continues Update on China's CCC Compliance Program Machinery Field Evaluation ESD An Annual Progress Report on ESD Standards An Update on IEC 61000-4-2 Automotive ESD Testing Handling Class O ESDS Devices Telecom Part 68 DSL Interoperability Testing RoHS An Update on RoHS Regulations EU Directives The EU's Physical Agents Directive Buyer's Guide Consultants and Services Product Spotlights Catalog Spotlights Product Directory Vendor Directory Advertisers Index

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