Hi I have an issue while probing with oscilloscope, When i probe at any point on the board, I am getting a 50Hz signal with 50V p-p. When i connect the UART cable from PC to the board, scope giving proper measurements. Can anybody explain the reason for this behaviour of the scope. Thanks and Regards, Bhavith ------------------------------------------------------------------ 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 technical documents are available at: http://www.si-list.net 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