Hi All, I was hoping someone here could help be better understand EN 51031-5-3 for Alarm systems - Intrusion systems.
Section 5.5.4 states: *2) The level of interference generated by the interfering transmitting equipment shall be increased until 2 or more alarm messages out of 5 generated by the standard transmitting equipment, are not received bythe receiving equipment. This level of the interference signal of the interfering transmitting equipment, measured on the spectrum analyser, is called level IL.3) Increase that level by 3 dB.4) 20 messages are sent by the transmitting device used for test purposes.5) Repeat this procedure (steps 2 to 5) for all used bands.Pass/Fail criterion: The EUT Rx/Tx has passed the test if it has correctly processed all messages sent by thetransmitting device used for test purposes and if no failure or tamper message is generated.* Do I read correctly that you would raise the interference signal until 40% or greater of messages are not received, then double the power for the interference signal, and the pass/fail requirement after this is that all messages must be received. Hopefully someone can help my misunderstanding because this does not seem to make sense. Best Regards, Scott Drysdale OOO - Own Opinions Only - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
