Hi All: This is my first reply, after "reading the mail" for a month.
SAE EMC standards for vehicle Emissions & Immunity test methods primarily benefit OEM car manufacturers and their suppliers. They do not set performance "requirements" per'se but do offer performance characteristics and operating regions for the parameters. There is an ongoing committee effort to harmonize with related world wide standards such as CISPR , ISO ,IEC and so on. "In general" you will find the immunity levels in SAE very challenging for many electronic devices while emissions levels are somewhat more difficult than typical land based standards. The noise threat sources in vehicles are many and varied in their amplitude, repetition rates and frequencies while radio receivers and their antennas are in close proximity and coupling to the noise sources. Vehicles can travel to places where they are exposed to very severe external fields over a wide range of frequencies and signatures . The newly revised SAE web site for the committee work is available from the http://www.sae.org home page. See the left hand column of links. There select "discussion forums" where you may "log in here" or inspect "see all forums" and select "public" discussions then viewing a huge list and select the 2 committees on Electromagnetic Immunity ... or Electromagnetic Emissions... They create those standards respectively. Be sure to review the web site scope & use agreements. http://forums.sae.org/access/dispatch.cgi/TEVEES10_pf http://forums.sae.org/access/dispatch.cgi/TEVEES3_pf To summarize , SAE J551 covers whole automobiles. SAE J1113 covers modules & "devices" . Their usual application is OEM assembled vehicles & the modules within , installed during the new vehicle manufacturing process. So-called "aftermarket" modules (e.g. security alarms) and things like 2-way radios fitted to the car *after purchase* are not explicitly defined. Each OEM car maker has issued "installation bulletins" for 2-way radios. The American Radio Relay League (ARRL) summarized some of the carmakers info in its QST magazine a few years back. The ARRL EMC Book, "Radio Frequency Interference: How to find it and fix it" 1991, excerpted installation guideline information (from GM) in chapter 13 , written largely by Stu Sanders, KA0FPX, EMC Engineer at General Motors. By and large each OEM carmaker's EMC team has created guidelines for 2-way radios , specific to their vehicles with the usual disclaimers and legal warrantee statements, which must be addressed on a case by case basis. Ron , perhaps DENSO, as a supplier to automakers, already has such an expert committee member to SAE or other standards bodies within your company . Otherwise your active participation in the SAE committee could be mutually beneficial. Best regards, Jerry Meyerhoff Principal Staff Engineer Motorola AIEG [Automotive & Industrial Electronics Group] of IESS [ Integrated Electronic Systems Sector ] 4000 Commercial Ave Northbrook Il. 60062 DISCLAIMER: This report represents the best opinions and analysis of the author based on the information available which may be subject to change without prior notice. The confidentiality of this info is everyone's responsibility. Any opinions implied or expressed in this work are solely those of the author . The suitability of this information for making decisions rests solely with the reader. JDM :-) 1/20/2000 -----Original Message----- From: [email protected] [mailto:[email protected]] Sent: Wednesday, January 19, 2000 12:26 PM To: [email protected] Subject: SAE requirements Hi all, I am looking for information on SAE specifications requirements for Automobile based Cell phone systems. Can anyone suggest a list of recommended specs, or knows of an Engineer who can help me define the requirements. If there is no required specs, is there a list that is recommended to perform for good reliability of the product. Thanks, Ron Chernus, DENSO --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
