On Thu, 05 Mar 2015 01:27:23 +
Angus wrote:
> I've not seen any mention of anything other than the TDC1000.
>
> I was a bit surprised that they went down the less-integrated route
> and separated the TDC, but it turns out that for a lot of the sort of
> things they designed it for, a uC pro
Hello time-nuts community,
I hope this is the right place for the following question :)
I'm dealing with the simulation of powerlaw noise, and I stumbled upon
something I cannot explain when I tried out some formulas of IEEE 1139 [1]:
According to Table B.2 in [1] the one-sided power spectral d
Greetings to the time nuts,
I recently purchased this counter from Ebay. I don't have any connection
with the seller. It looks brand new. It is the only HP item that I now
have that is in current production.
Ebay Item: 271777486308
Keep the time,
Gordon WA4FJC
__
379998 <379...@qq.com> writes:
> Hi
>
> The spec is similar with TDC-GP22. In double-res mode, the
> resolution is 45ps, the stdev is 35ps. This unit is 55ps and
> 35ps. Not sure when the sample chip is ready. The TSSOP package is
> much more friendly to homebrew guys.
>
Indeed this looks like qu
>Greetings to the time nuts,
>
>I recently purchased this counter from Ebay. I don't have any connection
>with the seller. It looks brand new. It is the only HP item that I now
>have that is in current production.
>
>Ebay Item: 271777486308
>
>Keep the time,
>
>Gordon WA4FJC
Probably the
Servus!
On Thu, 05 Mar 2015 14:35:51 +0100
Wolfgang Wallner wrote:
> For the random walk noise the expected line is off by a factor of
> exactly 2 from the calculated plot, and I don't know how to explain this
> behavior.
I'm probably the wrong one to answer, as I have never done any noise
simu
On Thu, 05 Mar 2015 09:39:44 -0500
Ben Gamari wrote:
> Is this just a function of the ring oscillator
> duty cycle being much smaller?
There has been some development on how to do ring oscillators for
TDC applications in recent years. Driven to a large part by the need
for better (longer measure
Hello,
Thanks for all the feedback.
I should explain. I have an existing product that uses the 74AC14.
I have a customer who needs 5V into 50 ohm and can’t wait for the competitive
product that does this, or for me to re-design my unit.
So I have been looking for a quick fix.
I got excited when I
mar...@ptsyst.com said:
> BTW, the reason he wants this high voltage is because he is driving a very
> long cable from the distribution amp to the actual receiver.
If you have a long cable, the rise time at the driver isn't critical. It
will get filtered out by the cable.
Of course, how long
Martyn,
How long is the cable you are driving? If you have large ground
differentials you may destroy the chips very easily. Especially if between
industrial buildings.
Some of the things discussed here are fine for a hobby environment but
somewhat questionable in a commercial business.
Regards
Pau
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