[time-nuts] Z3815A show 0ns Predicted uncertainty

Mark C. Stephens marks at non-stop.com.au
Fri Jun 28 16:11:24 UTC 2013


Hi Charles,


My Z3805A are usually in the 1-4us range.
I was pleasantly surprised to see the nanoseconds!

I must ask, do you have the later Z3805A with the MTI oscillator?
Alll mine have the older 10811 Double oven.


-marki

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of Charles P. Steinmetz
Sent: Friday, 28 June 2013 10:26 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Z3815A show 0ns Predicted uncertainty

marki wrote:

>I noticed my Z3815A was show 0ns (zero) for predicted uncertainty tonight.
>Is there something wrong or is its predicted holdover uncertainty below 
>measureable (displayable) value?

I don't have a Z3815A and don't know how they are supposed to behave, but when the 24 hour holdover prediction of my Z3805A goes below 1 nS it registers in pS.

Best regards,

Charles




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