I am not familiar with this topic in RF way. But wanna to give some information. I think since the node is of high-impedance property, which means it do not have good driver to provide stable voltage potential, it should be sensitive to noise, which is a common sense in low frequency circuits. Let us imagine two scenarios for comparison. 1. Ground trace(well driven by the earth ): which is perfect immune to any noise 2. floating metal brick (no driven): which will be coupled easily by nearby metal trace. Is the explanation ok? By the way, I am trying to explain the issue in RF way. If the crosstalk comes to one metal trace, and the ends of the trace was of high-impedance property, then the reflection wave will be positive and make the voltage swing to double magitude, which made the crosstalk worse, am I right? BH Lim Guan Choon <guanchoon.lim@xxxxxxxxxxxxxxxx> wrote: Hi, all. Could anyone help to explain why high impedance traces are = prone to Radio frequency interference? I have come across this kind of = remark in articles, but no explanation why it is so. Please help. Warmest regards Lim ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu --------------------------------- Do You Yahoo!? ÆôÓõçÓÊÕʺţ¬Áì»áÑÅ»¢Í¨[ÉíÁÙÆä¾³ÁĵçÓ°]µÄ¶¯¸Ð÷ÈÁ¦£¬»¹ÓÐÍøÂçÉãÏñÍ·+ÑÅ»¢Í¨ÊÕÒô»úµÈÄãÀ´Äà --------------------------------- Do You Yahoo!? ÆôÓõçÓÊÕʺţ¬Áì»áÑÅ»¢Í¨[ÉíÁÙÆä¾³ÁĵçÓ°]µÄ¶¯¸Ð÷ÈÁ¦£¬»¹ÓÐÍøÂçÉãÏñÍ·+ÑÅ»¢Í¨ÊÕÒô»úµÈÄãÀ´Äà ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu