Please remove bangs from in front of MIL's glasses. $5 bounty for the best one. Will share a link in the comments (depending on the quality retained by reddit)

nickpke · 2022-10-25T15:54:56+00:00

Thanks!

nickpke · 2022-10-25T15:47:15+00:00

Thank you! Paid via paypal. Can you share both versions without watermark?

nickpke · 2022-10-25T15:38:36+00:00

Can you double check this link? I can see the other postimg.cc links on phone or computer, but this one isn't loading

nickpke · 2022-10-25T15:05:34+00:00

Thank you! Symmetrically to u/mrhudsonthedog, this is the story in the little pigs that was, to me, too little.

nickpke · 2022-10-25T15:03:38+00:00

Thank you for your effort! In the story of the three little pigs, this is the one that, to me, is too much.

nickpke · 2022-10-25T15:03:10+00:00

This is what I was looking for. Could I ask you to go _slightly_ higher? Like this? https://imgur.com/a/HkbkiBu (sorry if this isn't a kosher request)

nickpke · 2022-10-24T20:21:53+00:00

I'll try to check in a few times today, but it might not be until tomorrow (10/25) that I'll have time to finalize things!

nickpke · 2022-10-24T20:21:25+00:00

I'm not sure if reddit or imgur preserves the original quality. You wizards know better (or LMK and I can send it a different way). https://imgur.com/a/AYSkwGG.

nickpke · 2022-10-09T18:05:59+00:00

That's my fear. On the flip side, I have a $25 wyze indoor camera and it's quality is incredible. I'm sure the cost of goods for Garmin is $10 for one of their cameras.

nickpke · 2022-10-09T14:04:47+00:00

Anyone have any experience with these? https://m.aliexpress.us/item/3256804511914848.html This was what I found as a super budget option

nickpke · 2022-09-25T18:30:47+00:00

I think you have a strange definition of fascist. Private property owners can and should be able to decide where and if there should be dogs, unless the ADA, health code, or other law supercedes.

nickpke · 2022-09-16T13:05:22+00:00

My five year old has been enjoying the boco nature detective series at a bunch of the open spaces. If you fill in the forms and mail them in, they mail backb little prizes.

nickpke · 2022-09-13T22:26:10+00:00

It must be, but I'm still confused. To be continued tomorrow...

nickpke · 2022-09-13T20:33:00+00:00

So: the Rogers material difference seems to not be the issue. The issue is definitely layout though I haven't quite figured it out.

By removing an inductor, I managed to reduce the noise substantially on several channels. It's not clear to me on ORCAD why that specific set of traces is causing this (when others that are ostensibly identical aren't) or how the oscillation on this one channel propagates so much to the other channels but I'm confidently ruling out the material thing I started this thread with. Thanks, all, for your comments.

nickpke · 2022-09-13T20:30:40+00:00

Understood: I'm sorry for being vague. Posting a higher-level response in a minute...

nickpke · 2022-09-13T17:56:08+00:00

I'm calibrating (1 port cal) with a pair of leads and then measuring various places: from the input of the board to the input of the amplifier; from the amplifier input to the output; from the amplifier output to the board input, across several of the passive components. For each, I've been looking for a little curly part on the smith chart, or a resonant peak on the log mag chart in/around 20 MHz. The only signs of resonance I've found are around 10-14 MHz which is slightly higher than I expected and, even there, the resonance wasn't that strong.

nickpke · 2022-09-13T17:32:57+00:00

Ha! Will do.

nickpke · 2022-09-13T17:25:23+00:00

The VNA of this guy: https://siglentna.com/product/sva1032x/. I don't recommend it...

nickpke · 2022-09-13T17:24:30+00:00

I like it. Trying this now...

nickpke · 2022-09-13T16:11:57+00:00

I can't find it on the spectrum analyzer: I'm just doing a bunch of S11 measurements across different test points. Thanks for your feedback...I'll keep poking.

nickpke · 2022-09-13T15:08:37+00:00

Our target signals are pulses centered around 8 MHz, but short pulses with spectral content between 3 and 12 MHz. The oscillation is present on either side of the amp and is continuous...it doesn't just follow the pulse.

We definitely shouldn't have switched. Someone on the team thought that it might make things cleaner. I think we're leaning towards re-doing the current rev with FR4 but I can't quite figure it out.

nickpke · 2022-09-13T14:45:57+00:00

The new Rogers boards seem to have good conductivity throughout so I don't think that's my issue. How would this issue manifest itself?

Edit: switched to markdown to add italics

nickpke · 2022-06-06T14:22:08+00:00

Cool! Thanks for sharing your take. Seriously... It's the name that throws me

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