[time-nuts] Another ThunderBolt cabling question

Chris Albertson albertson.chris at gmail.com
Wed Jun 13 22:17:20 UTC 2012


Sure enough the Thunderbolt will be able to drive five BNC jacks just
fine.  When you get into problems is when you try and plug stuff into
the sockets.   Kidding aside, really what you plug into hit is what
matters.  Three is easy, five is kind of pushing it without a
distribution amp.  All depends on what you are plugging in.

   For driving multiple piece of test equipment the conventional way
is to use a few T to connecter and daisy chain the cable then at the
end connect a 50 ohm terminator.  I think this setup gets a better
signal without so many reflections

In the real world your plan would work fine.  Most test equipment has
well engineered 10MHz input and can work on anything you give it.
But in this case it is cheap and easy to simply use some TEEs.

On Wed, Jun 13, 2012 at 2:33 PM, Chris Wilson <chris at chriswilson.tv> wrote:
>
>
>  13/06/2012 22:27
>
> About to do the permanent installation, if I bring two leads from the
> 10 MHz and 1 PPS BNC sockets on the TB to a panel in my shck can i
> have say 5 BNC sockets on the panel wired in parallel, with the lead
> from the 10 MHz socket on the TB feeding them all? And a single socket
> for the 1 PPS? Any need to screen the back of the socket panel, or
> enclose it in a metal box? Cheers.
>
> Oh, I have been running lady Heather for a while tonight, here's a
> screen capture, does it look OK, ther's suddenly just two traces
> appeared? Thanks. http://www.chriswilson.tv/heather.png
>
> --
>       Best Regards,
>                   Chris Wilson.
> mailto: chris at chriswilson.tv
>
>
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-- 

Chris Albertson
Redondo Beach, California



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