mtt-11 at Yahoo! Groups

Re: TRL self-calibration algorithm

Dylan Williams — Wed, 30 Jul 2008 21:13:03 GMT

Hello Igor, In MultiCal and StatistiCAL you put in an estimate for the length of the fixture. The programs use this estimate at the lowest frequency to resolve

Re: TRL self-calibration algorithm

igorlinetsky — Wed, 30 Jul 2008 21:11:29 GMT

Actually knowing the type of the reflect standard corrects the S22 phase. Igor ... Dylan

Re: TRL self-calibration algorithm

igorlinetsky — Wed, 30 Jul 2008 17:29:36 GMT

Thank you Dylan When S21=S12 there is a 180deg ambiguity in the answer because of the square root function. Similarly, there is a square root to solve for S22

Re: TRL self-calibration algorithm

Dylan Williams — Wed, 23 Jul 2008 02:49:45 GMT

Sorry Igor, When de-embedding adapters you can use reciprocity (S21=S12) to solve this problem. Both MultiCal and StatistiCAL allow you to solve for adapter

Re: TRL self-calibration algorithm

igorlinetsky — Tue, 22 Jul 2008 21:59:43 GMT

Hello Dylan Looks like you replied to my message but the text did not show? Regards Igor

Re: TRL self-calibration algorithm

Dylan Williams — Tue, 22 Jul 2008 20:53:18 GMT

... Dylan Williams NIST 818.01 325 Broadway [+1] (303)497-3138 (TEL)

TRL self-calibration algorithm

igorlinetsky — Tue, 22 Jul 2008 13:58:37 GMT

Hello I've been following Doug Rytting presentation called "TRL Calibration". The equations all make sense and give good results however the presentation does

Re: What is the Most Practical Method to Add Optical Capabilities to

Dylan Williams — Tue, 26 Feb 2008 15:59:10 GMT

Hello Fei, It still is very difficult to measure scattering parameters with non-contact means. Nevertheless you might find this paper our group wrote on the

Re: What is the Most Practical Method to Add Optical Capabilities to

feicaguo — Tue, 26 Feb 2008 03:49:44 GMT

Are you guys talking about the contactless probing solution? Sorry about that if not. A few years back, I heard that people used optoelectronic probe to do

Re: What is the Most Practical Method to Add Optical Capabilities t

Dylan Williams — Wed, 01 Aug 2007 14:23:26 GMT

Hello Cory, If you are interested in power calibrations, I think that Agilent, New Focus, Newport, U2t, perhaps other options exist. Some of these might have

Re: What is the Most Practical Method to Add Optical Capabilities

cory.compton@... — Tue, 31 Jul 2007 19:25:59 GMT

Dylan, I contacted Anritsu, and they only support 1550nm for now, and their list price is about 25K. Do you know of any other vendors that are selling

Re: What is the Most Practical Method to Add Optical Capabilities t

Dylan Williams — Tue, 31 Jul 2007 15:09:44 GMT

Hello Cory, I believe that you are correct that the most inexpensive way to proceed is to use a calibrated photodiode. I am not sure how much Anritsu sells

What is the Most Practical Method to Add Optical Capabilities to an

comptoca — Tue, 31 Jul 2007 13:41:55 GMT

Hi, I am looking into what is the most practical method to add optical capabilities to my 8510C. I need to be able to measure communication laser diodes and

Re: Laser Diode (TOSA) Measurment Fixture

Dylan Williams — Thu, 15 Mar 2007 19:45:27 GMT

Dear Cory, In my experience, on-wafer probes can be made to work quite nicely with TRL standards printed on PCB. I would consider establishing your first-tier

Laser Diode (TOSA) Measurment Fixture

comptoca — Thu, 15 Mar 2007 15:10:00 GMT

Hi, I am trying to measure and model a comunication laser diode (TOSA) in a TO can. In this case it is a 1550nm wavelength DFB laser intended for 2.5Gbps. It