[time-nuts] NIST isolation amplifiers

Bill bill at hsmicrowave.com
Tue Nov 25 19:02:48 EST 2014

Hi Dave,

That's exactly the approach I'm going to use. Outputs that go to instruments that might see the low noise and then outputs that go to devices that aren't phase noise sensitive like counters, scopes, pulse generators and others.


-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Dr. David Kirkby (Kirkby Microwave Ltd)
Sent: Tuesday, November 25, 2014 3:46 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] NIST isolation amplifiers

On 25 Nov 2014 23:10, "Bob Camp" <kb8tq at n1k.org> wrote:
> Hi
> For a modern build, the PZT3904’s and PZT2222’s are a pretty good way 
> to
go with this amp.
> For normal distribution to instruments, there’s really no need to do
anything this complex.
> Bob

I am also thinking about the construction of a  distribution amplifier with
15 or so outputs.  One thing that came to my mind, is that there may be some point in  having one or two outputs where more money is spent. Then if one thinks an item might be particularly sensitive to some aspect of the reference,  one can use that.

One could for example have one or two outputs which have harmonics suppressed 100 dB, without going to unnecessary expensive on all outputs.

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