Re: ANY(ONE can code

From	Gerhard Hoffmann <dk4xp@arcor.de>
Newsgroups	sci.electronics.design
Subject	Re: ANY(ONE can code
Date	2025-08-22 17:21 +0200
Message-ID	<108a1tn$dsns$7@solani.org> (permalink)
References	(8 earlier) <vec6akhi773e9d42o5o1ttclens1q2ep5n@4ax.com> <dnf6akltiv2iuiuf5d0vtrj36i2cmnljs4@4ax.com> <cci6akle3dfcr7a4rbltr6kigo6973e70j@4ax.com> <10897mt$dsns$2@solani.org> <6mvgak9khfkv7sa77dft1iv469grcu1ro2@4ax.com>

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Am 22.08.25 um 16:39 schrieb john larkin:
> On Fri, 22 Aug 2025 09:54:05 +0200, Gerhard Hoffmann <dk4xp@arcor.de>
> wrote:
> 
>> Stanford SR-620
> 
> We use Keysight 53220s. They are OK but have a lot of jitter.
> 
> It would be fun to make a sub-ps jitter TIC, but I guess there's no
> market.
> 
> I see parts, logic and oscillators, with fs jitter specs. I suppose
> people use high-end oscilloscopes to measure them, or some indirect
> trick.

What makes me really wonder with the SR-620: How can such a
small transformer feed that tablet of ECL!

Somehow all counters end at 5ps resolution.

I think it is harder than it looks at first sight.
pulse width / delay is relatively easy; it can be tested with 2
nearly synchronous oscillators with the second one sliding
next to the other over a span of several hours, but watch the
air conditioning. That is also ok for linearity versus phase.

For linearity vs. rise/fall times: I have no idea how to
guarantee that. Or temperature changes.

A little birdie told me yesterday that our ISS SPAD experiment
has seen first laser photons from the earth in the expected
ps window. :-)

Gerhard

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ANY(ONE can code Don Y <blockedofcourse@foo.invalid> - 2025-08-10 07:27 -0700
  Re: ANY(ONE can code Bill Sloman <bill.sloman@ieee.org> - 2025-08-11 02:09 +1000
  Re: ANY(ONE can code BillGill <tonisdad215@gmail.com> - 2025-08-11 07:12 -0500
    Re: ANY(ONE can code john larkin <jl@glen--canyon.com> - 2025-08-11 07:22 -0700
    Re: ANY(ONE can code Don Y <blockedofcourse@foo.invalid> - 2025-08-11 07:27 -0700
      Re: ANYONE can code Don Y <blockedofcourse@foo.invalid> - 2025-08-11 07:46 -0700
      Re: ANY(ONE can code john larkin <jl@glen--canyon.com> - 2025-08-11 08:50 -0700
        Re: ANY(ONE can code Bill Sloman <bill.sloman@ieee.org> - 2025-08-12 03:32 +1000
          Re: ANY(ONE can code john larkin <jl@glen--canyon.com> - 2025-08-11 16:19 -0700
            Re: ANY(ONE can code Bill Sloman <bill.sloman@ieee.org> - 2025-08-12 16:19 +1000
              Re: ANY(ONE can code john larkin <jl@glen--canyon.com> - 2025-08-12 07:37 -0700
                Re: ANY(ONE can code Bill Sloman <bill.sloman@ieee.org> - 2025-08-13 15:28 +1000
                Re: ANY(ONE can code Bill Sloman <bill.sloman@ieee.org> - 2025-08-17 02:17 +1000
                Re: ANY(ONE can code john larkin <jl@glen--canyon.com> - 2025-08-16 13:40 -0700
                Re: ANY(ONE can code Bill Sloman <bill.sloman@ieee.org> - 2025-08-17 14:35 +1000
                Re: ANY(ONE can code john larkin <jl@glen--canyon.com> - 2025-08-17 08:31 -0700
                Re: ANY(ONE can code Bill Sloman <bill.sloman@ieee.org> - 2025-08-18 02:47 +1000
                Re: ANY(ONE can code john larkin <jl@glen--canyon.com> - 2025-08-17 10:23 -0700
                Re: ANY(ONE can code Bill Sloman <bill.sloman@ieee.org> - 2025-08-18 21:08 +1000
                Re: ANY(ONE can code john larkin <jl@glen--canyon.com> - 2025-08-18 07:10 -0700
                Re: ANY(ONE can code Joe Gwinn <joegwinn@comcast.net> - 2025-08-18 10:57 -0400
                Re: ANY(ONE can code john larkin <jl@glen--canyon.com> - 2025-08-18 08:44 -0700
                Re: ANY(ONE can code Gerhard Hoffmann <dk4xp@arcor.de> - 2025-08-22 09:54 +0200
                Re: ANY(ONE can code john larkin <jl@glen--canyon.com> - 2025-08-22 07:39 -0700
                Re: ANY(ONE can code Gerhard Hoffmann <dk4xp@arcor.de> - 2025-08-22 17:21 +0200
                Re: ANY(ONE can code john larkin <jl@glen--canyon.com> - 2025-08-22 08:47 -0700
                Re: ANY(ONE can code Bill Sloman <bill.sloman@ieee.org> - 2025-08-19 17:12 +1000
                Re: ANY(ONE can code john larkin <jl@glen--canyon.com> - 2025-08-19 04:09 -0700
                Re: ANY(ONE can code Bill Sloman <bill.sloman@ieee.org> - 2025-08-20 00:53 +1000
                Re: ANY(ONE can code Gerhard Hoffmann <dk4xp@arcor.de> - 2025-08-22 10:45 +0200
                Re: ANY(ONE can code Don Y <blockedofcourse@foo.invalid> - 2025-08-22 02:14 -0700
                Re: ANY(ONE can code Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2025-08-22 11:41 +0000
                Re: ANY(ONE can code Buzz McCool <buzz_mccool@yahoo.com> - 2025-08-22 09:44 -0700
                Re: ANY(ONE can code Gerhard Hoffmann <dk4xp@arcor.de> - 2025-08-22 09:37 +0200
    Re: ANY(ONE can code Don Y <blockedofcourse@foo.invalid> - 2025-08-11 12:19 -0700
      Re: ANY(ONE can code john larkin <jl@glen--canyon.com> - 2025-08-18 08:47 -0700
        Re: ANY(ONE can code Bill Sloman <bill.sloman@ieee.org> - 2025-08-19 17:19 +1000
          Re: ANY(ONE can code bitrex <user@example.net> - 2025-08-22 20:52 -0400
        Re: ANY(ONE can code Gerhard Hoffmann <dk4xp@arcor.de> - 2025-08-22 10:57 +0200
          Re: ANY(ONE can code Don Y <blockedofcourse@foo.invalid> - 2025-08-22 02:18 -0700
            Re: ANY(ONE can code Gerhard Hoffmann <dk4xp@arcor.de> - 2025-08-22 11:39 +0200
              Re: ANY(ONE can code Don Y <blockedofcourse@foo.invalid> - 2025-08-22 03:09 -0700
                Re: ANY(ONE can code Don Y <blockedofcourse@foo.invalid> - 2025-08-22 11:51 -0700
            Re: ANY(ONE can code john larkin <jl@glen--canyon.com> - 2025-08-22 07:54 -0700
              Re: ANY(ONE can code Bill Sloman <bill.sloman@ieee.org> - 2025-08-23 02:11 +1000

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