little test board Z518

(re-post) Interesting, yeah, I checked their datasheet. These SN65LVDS_ parts have many nice features.

cheers, RS

The +2 divider source impedance is around 160 ohms, so it should be OK. But good point.

The timings don't need to be super precise (they won't be), just fairly stable.

Most scopes are mediocre or downright terrible for measuring time from an external trigger to a vertical channel. Most modern digital scopes quantize an external trigger to one sampling clock interval, and add extra drift too. The best way to measure delta-t or jitter is vertical channel-to-channel.

A dual-channel sampling head, like an SD-24, should sample both channels simultaneously. There is one sample pulse generator and two traveling-wave diode signal samplers:

What an odd looking instrument. Can you pop the hood for some photos or do they have seals all over it? It looks like a project case with a tablet double sided taped into the window, with a power supply keypad and someshop made special binding posts.

Did you go looting last week?

Have any of your board/designs turned up on alibaba yet?

It's a pretty serious rackmount instrument. It looks really well engineered in real life. I wanted to open it up but figured it would be imprudent, especially since Tek has been so friendly.

The back is wild:

I was curious about the little thing on the upper-right of the front panel, with the two big screws. It's a hard drive.

???

No. Our stuff doesn't copy well into low-margin, high-volume junk.

Looks like J7 is wired up wrong, no?

Cheers

Phil Hobbs

Wow, yeah, the back is where the action is. I'm trying to figure out how the 'puter board is installed in there so close to the power supply. The VGA out and eSATA are a knock out combination.

Everything is free in SF these days, I saw it on TV. Looks like some sort of smash, grab 'n go type holiday sale.

Do you ever post intentionally broken schematics on the internet, for fun?

Oh yeah, that. We all carry hammers in our shopping bags.

We are trend setters. Copycat gangs are looting all over the country now.

No. Schematics are sacred. But goofy schematics are OK.

Good point. We should ground both lower pins. The Brat did this from my very rough sketch.

The barrel will ground through the box... when it's in the box.

That one has bitten us too. Fortunately the rework is easy and invisible. ;)

Cheers

Phil Hobbs

The hardware equivalent of "it's just a test and a branch."

The John Doe troll stated the following in message-id <sdhn7c$pkp$ snipped-for-privacy@dont-email.me:

And the John Doe troll stated the following in message-id <sg3kr7$qt5$ snipped-for-privacy@dont-email.me:

And yet, the clueless John Doe troll has itself posted yet another incorrectly formatted USENET posting on Wed, 1 Dec 2021 15:40:30 -0000 (UTC) in message-id <so851d$hk4$ snipped-for-privacy@dont-email.me.

This posting is a public service announcement for any google groups readers who happen by to point out that the John Doe troll does not even follow it's own rules that it uses to troll other posters.

VIdotl6l8rbq

The John Doe troll stated the following in message-id <sdhn7c$pkp$ snipped-for-privacy@dont-email.me:

And the John Doe troll stated the following in message-id <sg3kr7$qt5$ snipped-for-privacy@dont-email.me:

And yet, the clueless John Doe troll has itself posted yet another incorrectly formatted USENET posting on Thu, 2 Dec 2021 05:01:11 -0000 (UTC) in message-id <so9jum$ve9$ snipped-for-privacy@dont-email.me.

This posting is a public service announcement for any google groups readers who happen by to point out that the John Doe troll does not even follow it's own rules that it uses to troll other posters.

GPnMA84bw4R9

Why don't you old hens take your ritual clucking somewhere else?

Buy a battery and some LEDs and learn something.