Clean 10 MHz ref
Hi to time nuts.. This source has been mentioned before. I purchased a unit
several months after seeing it recommended. It is made by Leo Bodnar
Electronics in England. It is
The simplest way to get a very clean 10 MHz sq wave. I have only observed
the 10 MHz on a scope .. have no other reference to check it. Either phase
noise or adev, but data sheet
Promised very good phase noise. Mine cost $224.98 USD. Including postage It
comes with an ant you can just hang out the window and is powered by USB.
You need to use a USB Charger, because the PC USB port may be too weak
Other frequencies may also be produced(not a trivial task) .. It has two
outputs which may have different frequencies.. It is not a GPSDO in the
normal sense .. I think it is phase locked to the L1 carrier.
Nick Wagner .. KB6PL
On 9/13/2016 12:42 PM, Nick Wagner wrote:
Hi to time nuts.. This source has been mentioned before. I purchased a unit
several months after seeing it recommended. It is made by Leo Bodnar
Electronics in England. It is
The simplest way to get a very clean 10 MHz sq wave. I have only observed
the 10 MHz on a scope .. have no other reference to check it. Either phase
noise or adev, but data sheet
Promised very good phase noise. Mine cost $224.98 USD. Including postage It
comes with an ant you can just hang out the window and is powered by USB.
You need to use a USB Charger, because the PC USB port may be too weak
Other frequencies may also be produced(not a trivial task) .. It has two
outputs which may have different frequencies.. It is not a GPSDO in the
normal sense .. I think it is phase locked to the L1 carrier.
Nick Wagner .. KB6PL
It is non-trivial to set other than a few embedded frequencies with the existing
software. There has been a veiled promise of improved software that remains
unfulfilled. It is a GPSDO, although the internal oscillator is a TCXO, not an
OCXO. Mine runs on even a laptop USB port.
Wes
It is non-trivial to set other than a few embedded frequencies with the
existing
software. There has been a veiled promise of improved software that remains
unfulfilled. It is a GPSDO, although the internal oscillator is a TCXO, not
an
OCXO. Mine runs on even a laptop USB port.
Wes
---=====
Folks,
Mine's running of a standard PC USB port, and the power consumption measures
between 220 and 240 mA.
With the supplied software (mine dated 2016-May-10, but that may have been
the install date) setting the frequency is simply typing in the frequency in
Hz, clicking "Find" and clicking "Update". I've tried a whole variety of
random frequencies (e.g. 123.456789 MHz) and the device locks within a few
seconds.
One limit is that the second output frequency needs to be related to the
first, as far as I can tell.
Cheers,
David
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@blueyonder.co.uk
Twitter: @gm8arv
On 9/14/2016 2:59 AM, David J Taylor wrote:
It is non-trivial to set other than a few embedded frequencies with the existing
software. There has been a veiled promise of improved software that remains
unfulfilled. It is a GPSDO, although the internal oscillator is a TCXO, not an
OCXO. Mine runs on even a laptop USB port.
Wes
---=====
Folks,
Mine's running of a standard PC USB port, and the power consumption measures
between 220 and 240 mA.
With the supplied software (mine dated 2016-May-10, but that may have been the
install date) setting the frequency is simply typing in the frequency in Hz,
clicking "Find" and clicking "Update". I've tried a whole variety of random
frequencies (e.g. 123.456789 MHz) and the device locks within a few seconds.
One limit is that the second output frequency needs to be related to the
first, as far as I can tell.
Cheers,
David
True for the first frequency. The second statement may or may not be true, it
was not clear in the original description of the device. When I wrote Leo and
asked about a specific second frequency he did a manual calculation and sent me
the parameters. From another email reply:
"Sorry, did not catch your email first time. Thank you for your custom!
The numbers are internal settings of PLL chip Si5328 and you can find more
details here:
https://www.silabs.com/Support%20Documents/TechnicalDocs/Si53xxReferenceManual.pdf
You can set other frequencies just by typing them into Output 1 box and
clicking "Find" This will find and program the new frequency.
If you want two separate frequencies at the same time it gets a bit tricky
and often need manual setup. In such case let me know what combination you
would like and i will try to find the correct settings."
While this is process is helpful, it is hardly convenient and frankly me
deciphering the doc without a Rosetta Stone isn't going to happen.
Wes, N7WS
True for the first frequency. The second statement may or may not be true,
it
was not clear in the original description of the device. When I wrote Leo
and
asked about a specific second frequency he did a manual calculation and sent
me
the parameters. From another email reply:
"Sorry, did not catch your email first time. Thank you for your custom!
The numbers are internal settings of PLL chip Si5328 and you can find
more
details here:
https://www.silabs.com/Support%20Documents/TechnicalDocs/Si53xxReferenceManual.pdf
You can set other frequencies just by typing them into Output 1 box and
clicking "Find" This will find and program the new frequency.
If you want two separate frequencies at the same time it gets a bit
tricky
and often need manual setup. In such case let me know what combination
you
would like and i will try to find the correct settings."
While this is process is helpful, it is hardly convenient and frankly me
deciphering the doc without a Rosetta Stone isn't going to happen.
Wes, N7WS
---=
Wes,
Yes, the second frequency does depend on the first, and this is noted in the
review:
http://www.force12inc.com/content/Bodnar%20GPSDO%20QST%20review.pdf
You can easily have both outputs at the same frequency (e.g. 10 MHz),
though. Thanks for the pointer to the datasheet.
For me, just having the easily-adjustable single GPS-locked frequency in
such a compact, ready-to-run, unit is great. Perhaps someone will write a
little program to enable fuller use of the second output.
73,
David GM8ARV
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@blueyonder.co.uk
Twitter: @gm8arv