[time-nuts] GPSDO Alternatives

Don Latham djl at montana.com
Fri Dec 7 07:20:17 UTC 2012


Good thought, Bob. AD9548 $27, eval board a whopping $250, get a
thunderbolt :-). The eval board has a lot of SMA's on it...
Don L
Bob Camp
> Hi
>
> If all you want is a "something" locked to a GPS:
>
> Take the pps from the GPS and hook it to an AD9548. You probably will
> need a 50 cent CPU to set up the registers.  No muss, no fuss,  nothing
> to invent or design.
>
> Weather it does what you need to do is an entirely different question.
> Without a defined objective / need / performance goal this could go on
> for a couple hundred years
..
>
> Bob
>
> On Dec 6, 2012, at 7:43 PM, Chris Albertson <albertson.chris at gmail.com>
> wrote:
>
>> What if the OCXO had a sine wave output and then you used the PPS
>> leading
>> edge to gate the sine wave to a sample and hold.  then the sample is
>> measured by the Arduino's ADC?  I think(?) you get a 10-bit ADC or is
>> it
>> 8-bits.  The problem is the required speed of the sample and hold,
>> maybe
>> not easy to build
>> --
>>
>> Chris Albertson
>> Redondo Beach, California
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-- 
"Neither the voice of authority nor the weight of reason and argument
are as significant as experiment, for thence comes quiet to the mind."
De Erroribus Medicorum, R. Bacon, 13th century.
"If you don't know what it is, don't poke it."
Ghost in the Shell


Dr. Don Latham AJ7LL
Six Mile Systems LLP
17850 Six Mile Road
POB 134
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