[time-nuts] Synthesized Signal Generator query

[Didier Juges]

The very low phase noise requirements for a 3GHz generator really cuts down
your options while raising the price significantly. You may be better off
with two boxes if you can really reduce your requirements to what you need
as opposed to what you want.

Also, I am sure you have seen that the HP8644B is the low noise version
that only goes to 2GHz with option 2 while the HP8664A goes to 3 GHz with
higher noise. Option 4 brings the 8664A model very close to the B but is
pretty rare.

The king of low close-in noise are the HP8662 (990MHz) and HP8663 (2GHz?)
by about 20dB at 1kHz compared to the 8644A

Didier KO4BB


On Thu, Mar 7, 2019, 9:19 AM Don at True-Cal <truecalservices at gmail.com> wrote:

> Hi Jim,
> The 100K to 3G frequency range of the 8664A is what I'm looking for as a
> general signal source. The low phase noise needed will mostly be under
> 100MHz for work on clock, trigger and timing circuits. Thanks for the
> reply,
> Don
>
> -----Original Message-----
> From: time-nuts <time-nuts-bounces at lists.febo.com> On Behalf Of jimlux
> Sent: Wednesday, March 06, 2019 1:13 PM
> To: time-nuts at lists.febo.com
> Subject: Re: [time-nuts] Synthesized Signal Generator query
>
> On 3/6/19 7:44 AM, Don at True-Cal wrote:
> > Hello all,
> >
> > I have my sights on an HP 8664A with Opt. 004 Low Phase Noise and want
> > to keep the purchase around $1000. This signal generator meets all my
> > requirements except being able to play table tennis on the top due to
> > its size. Can anyone give me advise on any similar low phase noise
> > source that is not so big and heavy. I like the looks and size of the
> > E44xx series but do they come even close to the signal purity of the
> > 8664A. Non HP, Agilent like Anritsu is also a consideration but that
> > really opens up a host of unknowns. Any words of advice greatly
> > appreciated. Regards, Don
> >
>
> what frequency range do you need?  the venerable 8664A is 100k to 3G.
> Just so folks know what phase noise you're shooting for:
> at 1 GHz, -110dBc @ 1kHz out, -135 @ 10kHz out, -150 @ 100k, -160 @ 1 M
>
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