Hi, To measure the noise of the power plane (We use LDO to generate 5V), I did the following a) I built a cable using a 50Ù Coax cable and used the internal termination of the oscilloscope. b) Removed a CAP from the board, used these PADS to solder my probe. The noise measured was around 20mV To check the sanity of my measurement, Instead of my 50Ù probe, I used a standard 1MÙ probe and carried out the measurement. The measured noise was around 50mV I have the following question. a) By using a 50Ù probe, did I create a voltage divider? Thanks in advance for your time. Regards, Bala ------------------------------------------------------------------ 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 FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org 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