Hi Peter ...
At 02:41 PM 6/28/99 +0100, PETER PHILLIPS wrote: > >Dear group, > >Has anybody heard about the term EFFECT relating to EMC and environmental >testing combined. No. I believe there's an aircraft test that's titled something like "Magnetic Effects". But I have no idea what that test entails and I don't know if it's a combination type test. Someone out there must know. I once suggested the idea of going into an environmental with a piece of equipment to do ESD testing at various RHs for a Bellcore style testing. That went over like a lead balloon. I'm sort a glad of that since the discussion went onto temperature testing with ESD at various temp levels below freezing. For some strange reason, standing in a 6x6x6 ft room in tropical conditions one minute then arctic conditions the next while recording something like 200 data points at various ESD levels just wasn't all that appealing. But if I thought of it, I'm sure someone else has ... >I am looking for any information on the topic, also any views that people >may have regarding the change in EMC performance due to adverse >environmental conditions I had a PLL circuit giving me a bear of a time until I came back the next day after leaving at the site in below freezing temps. When it was turned on the next day, no PLL. Turned out the xtal froze up. But, it wasn't below the mfr's specs. Seems as though the mechanical impedance of the xtal was so high from low temps it wouldn't self start. That in turn started a routine test of prototype circuits using xtals in PLLs to be put into an environmental chamber at low temps. >Looking forward to your comments Besides speculating with Paschen's Law, I'd also like to hear any testing that combines ESD + altitude. Also, ESD + humidity. --------- 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).
