[time-nuts] GPS and Rubidium frequency standards and noise question (newbie).

Chris Albertson albertson.chris at gmail.com
Wed Jun 6 00:54:12 UTC 2012


On Tue, Jun 5, 2012 at 5:20 PM, Chris Wilson <chris at chriswilson.tv> wrote:

>
>
> I have thought of something I am unable to find an answer for via the
> normal Googling, etcetera. When I get my GPS locked standard will it
> be able to feed several items of test equipment simultaneously? IE,
> say a sig gen, a frequency counter, and my possible next purchase, a
> Signal Hound USB spectrum analyser? I believe a friend once said he
> uses a GPS reference throughout his shack,
>
>
It will likely work.  Most test equipment is designed not to load down the
signal.  Certainly it will work for two, likely for three but then you are
getting into the area why you might need a distribution amplifier.   Some
people are using old video amplifiers but the bandwidth of those is
marginal.     I think you will want the terminate the line (50 ohms) after
the last piece of equipment.

Tapr's "tadd-1" is an example of a good distribution amp.  It is no longer
available but you can download and read the manual and see the schematic.
You really don't need one but one thing it does provide is isolation of
both the signal can grounds.
http://www.tapr.org/kits_tadd-1.html

-- 

Chris Albertson
Redondo Beach, California


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