[time-nuts] Is Timelab with a Prologix-Eth and a PM6680 - working ?

[Azelio Boriani]

Well, let's see: usually the Allan deviation is computed by collecting
phase (time error) samples. You have to select time interval in TimeLab and
on the PM6680 TIME A-B. If you want to use frequency samples (this is
strange for me, never used frequency samples) then you must select
frequency in TimeLab and FREQ A on the PM6680.
Selecting TIME A-B requires that you use both the A and B inputs (start and
stop) to time your signals but since you are trying to measure the TBolt
with itself you must delay the signal going to A before it reaches B. Use a
long coaxial cable as a delay line (50 meters should work). Measuring a
signal with a delayed replica of itself can be useful to see how good is
the counter.

On Tue, Jul 3, 2012 at 6:26 PM, cfo <xnews3 at luna.dyndns.dk> wrote:

> On Tue, 03 Jul 2012 18:11:26 +0200, Azelio Boriani wrote:
>
> > When you start TimeLab, which mode does the PM6680 show? FREQ A or TIME
> > A-B?
> >
> It shows Data Type = time interval , i could also select frequency in the
> drop down box (This is the latest TimeLab - NonBeta).
>
> Now have i goofed ?
> Is time interval A->B inputs (blush)
>
> CFO
>
>
>
>
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