Hi
The "bad units" with the 10811's in them are usually marked "HP". The "good
units" with the true DOCXO in them are normally marked "Symmetricom".
Bob
--------------------------------------------------
From: "Pete Lancashire" <[email protected]>
Sent: Monday, September 06, 2010 6:14 PM
To: "Discussion of precise time and frequency measurement"
<[email protected]>
Subject: Re: [time-nuts] Anyone have a comparison of the Z3805A and a Tbolt?
Is there an external way on the 3805's to id the desired 10811 ? S/N or ?
Ditto on the 10811's
-pete
On Mon, Sep 6, 2010 at 11:31 AM, Bob Camp <[email protected]> wrote:
Hi
I have a couple 3805's and more than a couple TBolts.
There are two 3805's, one has the double heated 10811 the other has a
true
double oven. The true double oven / later design is the one you want.
Typically they have better TC and better ADEV at 10 seconds compared to
the
earlier part.
The TBolt has a much better GPS receiver in it and it is far more tweak
able with the Lady Heather software. It's default settings are not as
good
as the defaults on the 3805. With some work they can be vastly improved.
The 3805 runs on a single 24 or 48 volt supply depending on the model you
get. The TBolt needs +12, +5 and -12. Battery backup is easier on the
3805.
TBolts run $75 +/- 25. 3805's run $250 +/- $50. Shipping will be a bit
more
on the 3805.
The TBolt wins in bang for the buck and fun to tweak categories. The 3805
is the better plug it in and ignore it forever box.
Both will track a cesium well at 100,000 seconds and beyond. Both look a
lot like GPS at 100 seconds or so. Both have some significant variation
unit
to unit.
Bob
On Sep 6, 2010, at 11:13 AM, swingbyte <[email protected]> wrote:
> Hi All,
> Have been thinking of getting a GPSODO and I'm looking for advice on
> what
to choose. I haven't been able to find an ADEV comparison between these
two
units and am curious to know how their differences manifest themselves.
Apart from the 12 satelites vs 8 what practical advantages are there in
the
3805A over the Tbolt? With all the extra components there has to be
something. I notice that the ocxo is not the large Docxo of the 3801A -
which is better?
>
> Thanks
>
> Tim
>
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