Hi Hal, and TU for the reply. Tu also to everyone else with the very
helpful hints and info. Following the advice of Joe I checked out the
EEV Blog site.very good information about the different variants of
this maker. Turns out, because I have a model (date code) of 2014-12-09
that it corresponds to this revision and information:
custom board with surplus russianmorion mv89
<http://www.morion-us.com/catalog_pdf/MV89.pdf>OCXO. gps isu-blox
NEO-6M-0-001 <https://www.u-blox.com/en/product/neo-6-series>.
Who would have guessed a Russian OCXO. And, I guess the U-Blox is not
one of the better GPS units based on what Paul mentioned. But I think
there is software out there that will let me at least monitor what my
unit is doing and how many birds it is receiving data from. I also have
the 8-port signal splitter which is nice as I can now run my reference
to all my various TE.
Oh well, it is what it is as I do not have the money to purchase a
different one. To answer your question I am using the supplied "hockey
puck" style antenna placed outside my basement window well, sitting on a
small wooden shelf, but close to ground level. The antenna should have
a clear view from 90-280 degrees, from an elevation angle of 0-90
degrees. Anything from West to North to East (~280-90 degrees) is
blocked by the house. I guess my next step, as Bob suggested will be to
install some monitoring software to see how many birds I am able to see
on average.
Gedas, W8BYA
Gallery at http://w8bya.com
Light travels faster than sound
This is why some people appear bright until you hear them speak.
On 3/14/2016 12:55 AM, Hal Murray wrote:
w8...@mchsi.com said:
This is where I really embarrass myself.sometime ago I purchased an
inexpensive 10 MHz GPS based reference source (BG7TBL GPS Disciplined
Source) for my various counters, transceivers, spectrum analyzers, etc and
was wondering if it was a good purchase and if anyone else used a similar
unit. I guess in the end I am curious to know what the short & long term
accuracy and stability of my unit may be? I no longer have access to any
accurate (known) frequency sources like I did while employed and I do not
think I have the equipment here at home to measure my unit myself.
Long term accuracy will be very good - you are tracking GPS.
You didn't say anything about your antenna. That's probably the major
contributor to your short term accuracy.
Google found:
http://www.eevblog.com/forum/testgear/bg7tbl-gpsdo-master-reference/
Looks like there are various versions.
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