That makes sense - but which one is it and how to check the enable signal is being sent to it?
D.
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-----Original Message-----
From:
[email protected] <
[email protected]> On Behalf Of John Gord via groups.io
Sent: 14 March 2021 22:45
To:
[email protected]Subject: Re: [TekScopes] Broke my TDS3000B
David,
The TDS3000 series scopes have a fast-in, slow-out chip that is used for the higher sample rates. Apparently that chip is enabled for sample rates above 2.5 million samp/sec, but a normal ADC is used at 2.5M samp/sec and slower.
--John Gord
On Sun, Mar 14, 2021 at 04:54 AM, David C. Partridge wrote:
I've just put it back together after yet another cleaning session, but with no
change ?
However I do have something to report which may be useful: If I bring up the
acquire menu, and select "Fast Trigger" (500 points), then the calibrator wave
form is display correctly down to a sweep speed of 20us/div (400us/div in
"Normal Resolution" mode). If I go down 10us/div it all breaks up into a mush
again.
I'm sure this means something useful to someone who knows more about how this
beastie works.
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Martin
Sent: 12 March 2021 13:52
To: [email protected]
Subject: Re: [TekScopes] Broke my TDS3000B
I've no idea what I should be looking for and those pins are mighty small
and close together.
Oh yes, thats not easy.
I was thinking about checking if the lines are totally stuck or are looking
normal, i.e. change state every now and then.
Or if a line is moving a little when you switch below 400us... things like
that, to confirm or not if the ASIC really has a problem.
cheers
Martin
David C. Partridge