Welcome to the Forum

Hello, I'm currently working on an assessment of the NISM method in my lab where I am measuring the phase margin of a POL using both NISM and Bode plot methods to see how similar the results are. I'm running into some trouble trying to make the measurement on some of my buck converter POL's. Some of

Which connector should be used for the bias input highlighted above? I am trying to measure the output impedance of an LDO but I do not have this connector/adapter. Is it possible to order it separately?

Hi, I read the excellent DesignCon paper ('Power Integrity for 32 Gb/s SERDES Transceivers', by PICOTEST, Xilinx & Keysight), referenced in Lesson 1. In this paper, the advantage of raising the switching frequency of a DCDC is explored. I've had recent experience of choosing the BW of a DCDC convert

Currently NISM only works with the S2VNA s/w application which supports all Copper Mountain 2-port VNAs. The R60 is a 1-port VNA and utilizes the RVNA s/w application. There is a slight difference in the command set between S2 and R, and therefore NISM does not work with the RVNA application at th

I assume using two is not beneficial with respect to matching. Or is any pair of P2105A matched?

J2120A Usage In the vast majority of cases, the line injector is almost certainly working correctly. It is often the case that the test setup impacts the results and that a large voltage drop at its output is seen. We do get many questions about the J2120A and its operation. After reading the follow

P2102A USER: Hey Steve, I was super-excited to get my P2102A 2-port probe, but I am trying to figure out how to calibrate it for ultra-low impedance measurements. I seem to be getting bad results, can you help? Steve Sandler: This is a great question, and I am happy to help solve this for you. A

I am looking to measure an LDO gain/phase with the J2110A solid state injector. But, I am confused about the connections to do so on the module. Here is a very simple block diagram of the LDO. Normally, I have an injection resistor between VOUT and Rtop. Then, I measure across this resistor to get m

The old 2-port probe can't measure below 25mOhms. This is because it's a 2 (3) point contact, not 4 point Kelvin. The new one is a 4 point contact Kelvin probe. The old one is 1X and the new one is available in different attenuation, for measuring higher voltage and/or higher impedance. The new p

Can you recommend good cables to connect the J2101A to a DUT? About the PDN Cable SMA connectors. I read here that brass SMAs should be torqued to 3-5 in-lbs: https://www.microwaves101.com/encyclopedias/connector-torque SMA (stainless steel) 7-10 in-lbs (~1Nm) SMA (brass) 3-5 in-lbs (~0.4Nm) P

Hi, The impedance of a PDN is not some kind of a monolithic thing. It varies based on where it is measured or simulated. For most of the FPGAs and other high performance load chips, I think there are three important locations where we should check the PDN impedance - near the VRM, near the load, and

Seeking tips on using J2121A High Power Line Injector to measure boost PFC inductors inductance with bias currents up to 20Apk and in the frequency range of 100kHz-500kHz. From what I have found there is not much published on using this particular injector in this manor and what needs to be done to

I have a question regarding measuring Reverse Transfer/Crosstalk: In your Power Integrity book, in chapter 10 this is nicely explained about cal and measurement setup but both of these setups are using J2111A which is limited to 1.5V. What can I do in order to measure Reverse Transfer for lower vo

P2102A USER: I tried your Bode 100 calibration for the P2102A 2-port probe with the J2113A isolator and that did not seem to work. Should it? Steve Sandler: Sorry that didn’t work for you, but to be fair, I didn’t claim it would 😉. The J2113A is semi-floating which can cause offset errors w

Hello, I have been looking into different measurement methods on how to verify the stability of the control loop of COT buck converters. Traditional methods like bode-plots don't really work because of the inherent non-linearity. Is NISM effective at obtaining the phase margin for COT devices?

I have a glance to the Bode 100 application note about battery impedance testing with your current injector: https://www.omicron-lab.com/fileadmin/assets/Bode_100/ApplicationNotes/Battery_impedance/App_Note_Battery_Impedance_V2_0.pdf and I was wondering whether you see any impairment in doing the sa

We’re trying to determine what pitch the end user wants for their P2104A 1-port probe ( https://www.picotest.com/Products_P2104A.html ).

So we recently purchased a P2102A and while I really appreciate the ability to use the provided fixed width probe tips to probe standard surface mount components like 0402, 0603, 0805, 1206, I'm in a situation where I am trying to do 2 port impedance measurements on a couple new components (a diode

We just bought VRTS 1.5 Demo Board and tried todo the bode plot for the output of the board , Figure1: shows the setup and everything is setup in accordance to the guidelines provide by siglent in the link below. Measuring Power Supply Control Loop Response with Bode Plot II - Siglent (siglenteu.c

I am taking an output impedance measurement using the 3-port (voltage / current) method. Here is my calibration test setup: I feel this is a very good test setup, and these are the shortest cables I can readily locate. Everything has the look and feel of "good working order" or is brand new. I us