Jason, It is surprising how difficult it can be to find a lot of information on multiport systems, given their availability for the past several years. And in my not-so-humble opinion, you are asking a great set of questions. Sorry, but I couldn't resist the opportunity for a shameless plug! If you'll be at DesignCon, check out our presentation: 13-WA2 | Architectural Considerations for Multiport Vector Network Analyzers (9:40-10:20 on Wed) We don't talk about vendors in the paper. Since a)I am not in marketing, and b)most vendors have several potential architectures to choose from, we have approached our presentation from an architectural perspective. We also won't answer everything you are looking for in 40 minutes, but will hopefully give you some additional info that may help with your choices. The information we show in the paper is based on ~20GHz 4-port and 8-port measurements, and our experience thus far with 12-port. If you aren't able to attend DesignCon, shoot me a note off-list and I'll see if we can get the paper/pres off to you. Best regards, -Brett -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of pritchard_jason@xxxxxxx Sent: Wednesday, January 24, 2007 3:31 PM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] 4 Port VNA recommendations? Hi All, I'm looking for Pros and Cons of available ~20Ghz 4 Port VNA's. I noticed there are a few vendors Rohde & Schwarz, Anritsu and Agilent that have this capability.=3D20 I have only used the Agilent PNA and was wondering what the benefits of the other vendors are. I'm interested in accuracy, ease of use/calibration, price, support, HW reliability, etc..=3D20 Thanks! Jason Pritchard EMC ------------------------------------------------------------------ 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: =20 //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 =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 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