[time-nuts] Looking for OCXO
Bob Camp
kb8tq at n1k.org
Fri Feb 26 12:15:24 UTC 2016
Hi
If you put a filter on the output of the DIP (or other pkg) XO, you can demo a
sine wave into a scope as well as a square wave. You will likely need a generator
to power the scopes if it is outdoors so consider that as well. Not all generators supply
nice clean power ….
Bob
> On Feb 26, 2016, at 3:20 AM, Hal Murray <hmurray at megapathdsl.net> wrote:
>
>
> jdownj at gmail.com said:
>> I'm going to be taking some oscilloscopes to a hamfest this summer, and I
>> am going to have a truck full of stuff anyway, and would like to avoid
>> hauling my signal generator to provide a demonstration of the scopes. Does
>> anybody have a 50MHZ+ OCXO or other oscillator with a coax(sma/bnc) that
>> they would like to part with? Something that doesn't meet time nuts
>> standards is perfectly fine, just want something that is faster than the
>> built in calibrator on the scopes.
>
> Do you have any of the standard 14 pin dip osc packages in your junk
> collection? You can probably run one off a pair of AA batteries. The square
> wave output would be good for showing what a scope can do. Most of the not
> high frequency osc packages have slow rise times. You might want to run it
> through a buffer. A non terminated connection on a few feet of coax will
> give you nice reflection spikes to look at.
>
> The best scope demo toy I ever saw was a Tek giveaway. It was a burst of
> high frequency stuff with a low rep rate. There are all sorts of
> opportunities for aliasing with digital scopes.
>
> The old skier avalanche beepers work pretty well too. Their burst is
> something like 455 kHz modulated at 2 kHz. (I think they changed the
> frequency 10 years ago.)
>
>
> --
> These are my opinions. I hate spam.
>
>
>
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