[time-nuts] Broadband synthesizer

J. Forster jfor at quik.com
Wed Jul 13 01:16:44 UTC 2011


Oops. Must remember to engage brain. It's not phase locked. It's counter
locked.

Sorry,

-John

==============


> Bill,
>
> Believe it or not, the HP 8640B is one of the cleanest, as far as signal
> goes, that you can get, and you can get an option that will take it to 1
> GHz, if I remember. You can pick these up pretty cheap, but they have a
> problem with some plastic gears going out on the tuning assembly. These
> are
> old too, but you can find junkers for parts.
>
> From a report I read on signal purity once, the next best for these
> oldies,
> was a Boonton 102, which outperformed a lot of modern generators
> concerning
> purity. However, it won't go to 1 GHz, I don't think, and I don't think
> there's an option for it.
>
> If you're not too worried about extra clean signal purity, there are
> several others, including ones made by Fluke, and or Wavetek. Don't get me
> wrong, these not are cheap junk, it's just they didn't show as clean an
> output as the HP and Boonton above. Without knowing any other features you
> want, it's hard to tell you anymore than these recommendations.
>
> I forget where I read the test done on several of these RF generators, but
> it's on a website, and others on here may know of the tests I'm speaking
> of. Also, on the HP 8640B, one could get those plastic gears recut in
> brass, if they did break, and they would last forever.
>
> Best,
>
> Will
>
> *********** REPLY SEPARATOR  ***********
>
> On 7/12/2011 at 7:41 PM Bill Dailey wrote:
>
>>Looking for recommendations for a broadband synthesizer with external
> reference connection, at least 1mhz to 1ghz with micro to millihertz
> resolution.   Oh yeah under $1000 or so.  I found a real nice one from
> holzworth but it is about $5k which is a bit rich for me.  I have seen.
> Various hp synthesizer but digging through the specs and the number soup
> is
> tough for a non-electronics guy.
>>
>>Tia,
>>
>>Doc
>>
>>Sent from my iPhone
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>
>
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