1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared and published by Underwriters Laboratories (UL). Itis normative for the applicable
2、UL Product Certification Program(s); however, it is currently not part ofthe UL Standard(s) referenced below.Product Category (CCN): AMCXStandard Number: UL 1610Edition Date: October 26, 1998Edition Number: 3Section / Paragraph Reference: 82 / 82.1 thru 82.5Subject: Interference Immunity Test Method
3、ology for Products Utilizing SpreadSpectrum Technology and Clarification for Products Utilizing Narrow BandModulationDECISION:Narrow Band Modulation: See Clauses 82.2, 82.3, and 82.4Spread Spectrum Modulation:A conducted, modulated interfering signal as described in Clause 82.4 with a level of 10dB
4、below thereference level signal as determined in Referenced Level Determination, Section 81, within the bandwidthshall be applied to the signal transmission to the receiving equipment to represent a radio noisyenvironment.The interfering signal shall be applied on all of the frequencies in a sequent
5、ial manner used by theequipment under test.Each frequency shall be subjected to the interfering signal for a duration period of: (number of channelsx attempts per channel x occupancy time per channel) = durationThe interval for the interfering signal to change between frequencies shall not exceed 1
6、second.The interference signals shall not cause false alarming; however, they may cause a jamming or a loss oftransmitter indication. Operation of the receiver/transmitter combination shall comply with therequirements for the Error (Falsing) Rate, Section 86 and Throughput Rate, Section 87.RATIONALE
7、 FOR DECISION:The advancement of radio frequency technology has evolved beyond the requirements defined in UL1610. The existing requirements to evaluate short range radio frequency devices pertain to single channeltechnology. With the introduction of spread spectrum technology there is a need to add
8、 requirements sothat a proper evaluation can be performed. A statement was also added to identify the applicablerequirements for Narrow Band modulation to provide delineation from the applicable requirements forSpread Spectrum modulation.Copyright 2008 Underwriters Laboratories Inc.UL, in performing
9、 its functions in accordance with its objectives, does not guarantee or warrant thecorrectness of Certification Requirement Decisions it may issue or that they will be recognized or adoptedby anyone. Certification Requirement Decisions are the opinion of Underwriters Laboratories Inc. inpractically
10、applying the requirements of the standard. They do not represent formal interpretations of theUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULstandard under American National Standards Institute (ANSI) processes. UL shall not be responsible to
11、anyone for the use of or reliance upon Certification Requirement Decisions by anyone. UL shall not incurany obligation or liability for damages, including consequential damages, arising out of or in connectionwith the use or reliance upon Certification Requirement Decisions. The electronic version of theCertification Requirement Decision is the current version and previously printed copies may be outdated.This document is published as a service to ULs certification customersSTANDARD NUMBER: UL 1610 -2-
