berkeman's latest activity
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berkeman reacted to BillTre's post in the thread Share Animal Pictures: For Animal Lovers with
Haha.
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berkeman replied to the thread Does memory follow classical or quantum methods?.There is the primacy effect, which describes why we remember the first few items of a list better...
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Two portrait shots taken today of my lovely cat: (Lens: Vivitar 100mm f/2.8)
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berkeman reacted to Astronuc's post in the thread Artemis 2 launch - humans return to the Moon after 54 years with
Informative.
Artemis I was an unmanned test flight to test various systems and regain experience. Artemis II is the first manned flight in 54 years... -
berkeman replied to the thread Undergrad I don't understand Dedekind cuts.Please remember that AI is not allowed as a reference in the technical PF forums. You haven't posted your AI discussion here in this...
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Like the ones who translated "Profesor Escalera" into "Stairmaster"? :).
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berkeman reacted to Baluncore's post in the thread Interpreting VIA PCB characteristics through TDR and TDT with Informative.
Here is a simple TDR simulated in LTspice. Remove the .txt extensions from both files, then run the LTspice file.asc Start by changing...
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berkeman reacted to Baluncore's post in the thread Interpreting VIA PCB characteristics through TDR and TDT with
Like.
TDR is a plot of impedance (driver voltage) against reflection time. Z = √( L / C ) You cannot say if it is the inductance or the... -
berkeman replied to the thread A philosopher who challenges the basics and their assumptions.Welcome to PF. Please be sure to read the PF Rules (see INFO at the top of the page). We do not allow personal speculation or...
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berkeman replied to the thread Interpreting VIA PCB characteristics through TDR and TDT.Sorry, I meant to post a different 2nd link: https://en.wikipedia.org/wiki/Telegrapher%27s_equations This equation from that link...
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berkeman replied to the thread Interpreting VIA PCB characteristics through TDR and TDT.BTW, do you want me to fix the "TRT" in your thread title to "TDT"?
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berkeman replied to the thread Interpreting VIA PCB characteristics through TDR and TDT.https://en.wikipedia.org/wiki/Reflection_coefficient https://en.wikipedia.org/wiki/Telegrapher%27s_equations EDIT -- fixed 2nd link.
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berkeman replied to the thread Interpreting VIA PCB characteristics through TDR and TDT.The direction of the reflection (adding or subtracting from the transmitted pulse) will tell you if the ##Z_0## mismatch at the via is...
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berkeman replied to the thread Interpreting VIA PCB characteristics through TDR and TDT.The "TD" in TDR refers to the time domain (Time Domain Reflectometer). It measures reflections in the time domain as seen at the...
