> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of Stan, W1LE
> Sent: Friday, September 04, 2009 10:27 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] More Z3801/Tbolt com
From:
To:
Sent: Friday, September 04, 2009 12:36 PM
Subject: Re: [time-nuts] More Z3801/Tbolt comparisons
In a message dated 04/09/2009 11:18:07 GMT Daylight Time,
phill...@btinternet.com writes:
Racal 19## Counters are something else - - I got rid of
mine some years back, not only t
In a message dated 04/09/2009 16:32:09 GMT Daylight Time,
phill...@btinternet.com writes:
I must say that much of what you have stated is right, I have a 53131A
counter and the basic time-base is a joke, but agreed, we mostly use a
common external reference with our instruments.
There are s
04, 2009 12:36 PM
Subject: Re: [time-nuts] More Z3801/Tbolt comparisons
In a message dated 04/09/2009 11:18:07 GMT Daylight Time,
phill...@btinternet.com writes:
Racal 19## Counters are something else - - I got rid of
mine some years back, not only the ongoing problems with the key-pad, but
Yes, the sidereal day is definitely the proper interval to survey for.
The technique that I am using analyzes the data over minute, hour, and 24 hour
intervals. The Tbolt outputs data at one second intervals. There is not a
good way to evenly divide those 236 seconds over those intervals,
Hi Mark,
If we are being this careful, I wonder if you should use a SIDEREAL day of
averaging - 236 seconds short of a solar day ?
TTFN,
Peter Vince (G8ZZR, London, England)
On Thu Sep 3 19:40 , Mark Sims sent:
>...
> The next version of Lady Heather will have a very pr
In a message dated 04/09/2009 11:18:07 GMT Daylight Time,
phill...@btinternet.com writes:
Racal 19## Counters are something else - - I got rid of
mine some years back, not only the ongoing problems with the key-pad, but
I
don't think they put much cost into the oven osc. Perhaps you shou
tember 03, 2009 8:05 PM
Subject: [time-nuts] More Z3801/Tbolt comparisons
Yesterday, I thought the Tbolt was wandering around too much. So, I did a
factory reset and started a new 5K
fix self survey. At about the same time, I started a new self survey on
the
Z3801 thinking that if they were
bo
The standard self-surveys in these units leaves MUCH to be desired. You need
to do surveys for 24 hours to help mitigate satellite constellation and
atmospheric effects. Note that due to periods of poor satellite geometry, you
can't just survey for 24*60*60 fixes. You need the survey to be
Hi John,
With regard to the altitude, what I have found is that it is never close ! I
have seen variations all over the scale. What I did here is determine, to the
best of my ability, from TOPO maps what my altitude is and measure the height of
the antenna off of the ground where it is mounted a
Yesterday, I thought the Tbolt was wandering around too much. So, I did a
factory reset and started a new 5K
fix self survey. At about the same time, I started a new self survey on the
Z3801 thinking that if they were
both looking at the same satellites with the same antenna at the same time,
they
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