[time-nuts] Broadband synthesizer

Will Matney xformer at citynet.net
Wed Jul 13 01:45:33 UTC 2011


Sorry, I got this backwards.

The one I mentioned is a Racal 9082P, not 9028. It will only go to about
520 MHz, and so will the Boonton.

Best,

Will

*********** REPLY SEPARATOR  ***********

On 7/12/2011 at 9:41 PM Will Matney wrote:

>If you don't mind cranking the tuning knob for the cavity tuner, the 8640B
>is a good RF generator, not a synthesizer, which I also have one. The
>synthesizer I have, which you still crank or spin the knob, which in turn
>turns a digital encoder, is a Racal Dana 9028P, and I enjoy it over it's
>simplicity, like I do the 8640B. The Boonton is easy to use too, and I
>think it is set up similar to the Racal, internally, but I'm not sure. I
>find these easier, and quicker to use, than keyed inputs, and I have a few
>of these, which to be honest, draw dust. However, some of the keyed input
>synthesizers generally have a few more options too. 
>
>There's just too many different models and makes out there to really say
>what's best for a situation, without knowing all the features needed, but
>these are the simplest to use, that I've found, and have a decently clean
>signal.
>
>Best,
>
>Will
>
>*********** REPLY SEPARATOR  ***********
>
>On 7/12/2011 at 6:16 PM J. Forster wrote:
>
>>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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