[time-nuts] Opera coordinator has resigned
J. Forster
jfor at quikus.com
Sat Mar 31 20:42:57 UTC 2012
If you use a good design on the receivers, AGC output is virtually free.
It doesn't take much more to run that signal to a go/no go comparator.
-John
============
>
> jfor at quikus.com said:
>> It was happenstance that the OPERA connector was mated enough to work,
>> but
>> not enough to work properly.
>
> A while ago, I was thinking that half the problem was a design error. But
> then I couldn't figure out how to do it right. Maybe monitoring the pulse
> height would have caught this error. Maybe a different encoding scheme
> would
> be easier to monitor.
>
> I've worked with fibers for communications, but that was many years ago.
> The
> receivers have AGCs. If you monitor the AGC control voltage you should be
> able to catch things like loose connections. I don't think we ever did
> that.
> We did monitor the error rate. It was always 0.
>
> But that adds another level of complexity. Checking/monitoring is good.
> Complexity is evil. How do you decide?
>
>
> --
> These are my opinions, not necessarily my employer's. I hate spam.
>
>
>
>
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