12 kHz to 20 MHz range is a typical range of interest that covers many applications. And while at a minimum, 12 kHz to 20 MHz is probably useful for you as well as a rough gauge of the phase noise performance , you will want to use offset/center frequency that matches the spec of your application (i.e., PCI Express, etc.) Chris -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of bala Sent: Tuesday, July 01, 2014 8:18 AM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] 12 kHz to 20 MHz Hi, Why most of the application notes, datasheet represent 12 kHz to 20 MHz range of frequencies for phase noise measurement. Should I choose 12 kHz to 20 MHz range regardless of my actual carrier offset and center frequency? -- 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 forum is accessible at: http://tech.groups.yahoo.com/group/si-list List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu ------------------------------------------------------------------ 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 forum is accessible at: http://tech.groups.yahoo.com/group/si-list List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu