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Video: Using a Network Analyzer as a TDR

September 26, 2020 by Rolf Ostergaard

See how you can do fast TDR measurements using a network analyzer or VNA in this video. Whenever you are designing boards with specific characteristic impedances, you will want to be able to verify that on your fabricated boards. It’s recommended to put in test traces on each layer, but how do you measure this.… Read more

Filed Under: Measurement Tagged With: Network Analyzer, PDN, PI, Power Integrity, SA, TG, Video, VNA

Video: PDN Measurement with a Network Analyzer

April 2, 2020 by Rolf Ostergaard

See how easily you can do a PDN measurement using a network analyzer or VNA in the video here. Building solid power distribution systems (PDN’s) is maybe the most important learning from the signal integrity training overall. Because it matters. Both for the logic functions, the signal quality (integrity) and for the radiated emissions (EMI).… Read more

Filed Under: Power Integrity (PI/PDN) Tagged With: Network Analyzer, PDN, PI, Power Integrity, SA, TG, Video, VNA

PDN ground offset error when doing measurements

March 13, 2014 by Rolf Ostergaard

Is there a risk of ground offset error when doing PDN measurements? This is another question that popped up after the story about what happens when the test points are moved in a network analyzer setup for measuring bypass (or PDN – Power Distribution Network) on a board is: Would it change anything if the… Read more

Filed Under: Power Integrity (PI/PDN) Tagged With: Impedance, Network Analyzer, PDN

Measuring PDN on a populated board

March 2, 2014 by Rolf Ostergaard

How about measuring the Power Distribution Network – or PDN – on a populated board? The post on the importance of the distance between the measurement points used when measuring the impedance of all the bypass capacitance on a board triggered another round of questions. Good. One of them is: Why not do a populated… Read more

Filed Under: Power Integrity (PI/PDN) Tagged With: Capacitors, Network Analyzer, PDN, PI, Power Integrity

PDN measurement points: Does it really matter?

February 23, 2014 by Rolf Ostergaard

What would change if you move the PDN measurement points when you measure the PDN using a network analyzer? Ever since I did the video on how to use a network analyzer to measure the resulting impedance of all the bypass capacitors on a board, this question keeps coming up. One could speculate that two… Read more

Filed Under: Power Integrity (PI/PDN) Tagged With: Capacitors, Measurements, Network Analyzer, PDN, Power Integrity

Cheap 5GHz SMA Calibration Kit

January 3, 2013 by Rolf Ostergaard

How to buy a cheap calibration kit. When using a VNA or network analyzer, you will need a “cal kit” (calibration kit) to calibrate away any effects of cables, connectors, etc. that are not part of what you are trying to measure. For some odd reason, official calibration kits are fairly expensive. But the guys… Read more

Filed Under: Tips and tricks Tagged With: Equipment, Network Analyzer, Tools

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