[time-nuts] Odetics 365

[Rob S.]

Hi Rob,

The counter is free running and it has option fitted 4 fitted, a XOCO. After
it was suggested I check the specs on the counter I obtained them and found
that up to 2 Hz @ 10 MHz is in spec.... ( 6 months after Cal ) 200 Hz @ 1
GHz is in spec....  I was a bit disappointed 

I usually run this setup the other way around, the Odetics supplying a 10
MHz reference to the counter, a specan and a sig gen but after being in
storage for a few years I thought it better to check that it's all
working....

Cheers and Thanks everyone for the direction / suggestions

Rob.

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Rob Kimberley
Sent: Saturday, October 20, 2012 1:43 AM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Odetics 365

I've just re-read this post after looking at the replies.

If the 365 is Time locked and showing and offset of 2.98E-13 then it looks
to working fine, and I would suspect that it is the frequency counter
oscillator that is drifting. 

Is the frequency counter free running or locked to any other standard?

Rob Kimberley

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Rob S.
Sent: 18 October 2012 07:40
To: time-nuts at febo.com
Subject: [time-nuts] Odetics 365

Hello Group,  first time post

I have just got my Odetics 365 working again after it being packed away for
a few years. I have it connected to a HP 5386A frequency counter and am
monitoring the 10 MHz output ( down to 0.01 Hz res ).

I am noticing the frequency is drifting about 1.5 to 2 Hz over the day and
settling low for a few hours ( aprox midday ) and then settling high about
12 hours later. The 365 is showing TFOM4 and Time locked, has a GDOP of 3.68
and displays a frequency error of +2.98E-013  and a Std error of Est of
4.80E-008. The averaging is turned off and it "see's" 3 to 5 satellites
continuously.  My question is would this be normal behavior ( + or - 2 Hz )
for this type of equipment or is it looking like I have something that is
drifting a bit ? Also would switching the averaging on help ?

Any thoughts would be appreciated Group,

Thanks and Cheers,

Rob.

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