I have found the following Agilent notes to be particularly valuable: AN 1287-3, Appying Error Correction to Network Analyzer Measurements AN 1287-9, In-Fixture Measurements Using Vector Network Analyzers AN 1364-1, De-embedding and Embedding S-Parameter Networks Using a = Vector Network Analyzer Product Note 8510-8A, Network Analysis Applying the 8510 TRL Calibration = for Non-Coaxial Measurements Product Note 8510-5B, Specifying Calibration Standards for the Agilent = 8510 Network Analyzer Also applicable: AN1291-1B, 10 Hints for Making Better Network Analyzer Measurements And there are more on Agilent's web-site. Those should answer most of your questions... IMHO, Eric Bogatin of Gigatest also gives a very good class on the use = of VNA and probe stations. Good luck! Jeff Loyer -----Original Message----- From: Felix Mbairi [mailto:felix.mbairi@xxxxx] Sent: Thursday, June 19, 2003 2:36 AM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Reference plane Hello, Excuse me my ignorance! I need some clarity about reference plane for = on-wafer calibration & measurement using VNA and probe Station. Can you = please tell me what determines the reference plane, how to define it and = does it has to do with the dimensions of DUT and calibration artifacts. I greatly appreciate your response. Thanks Felix ------------------------------------------------------------------ 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: =20 //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages=20 Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu =20 ------------------------------------------------------------------ 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