[time-nuts] OT favorite signal generator?

Robert Darlington rdarlington at gmail.com
Fri Jun 19 09:13:46 EDT 2009


I just bought an HP 3325A synthesizer/function generator that I really like
(for some things anyway) in about that price range.   What you get is
probably dependent on what YOU need though.  This thing is pretty limited
but this particular one has the high voltage option so the output goes up to
40 volts up to 1MHz.   It only goes to 20.99999999 Mhz (at up to 10V I
think) but for 99% of what I do that's just fine.  It has a 10MHz external
reference which I hook to either an Rb osc or a Thunderbolt depending on
what I'm doing.  It's pretty neat to see all the digits match between the
3325A and the 5335A counter.  Of course, that's being clocked by the same
oscillator too.

Also, I noticed on some signal generators, dropping the output down to a few
mV distorts the signal.  What I learned to do was send my signal out at
about 1 volt ((RMS or p2p, doesn't matter) and go through a step attenuator
to drop it back down so it comes out clean.

-Bob, N3XKB

On Fri, Jun 19, 2009 at 6:04 AM, Patrick <optomatic at rogers.com> wrote:

> Hey everyone
>
> Sorry for the off topic post. I have received great advice in the past
> with items for my little shop and I can't resist to ask again.
>
> I am thinking about buying a signal generator. I suspect that I will
> mostly use it to inject low uV/mV signals into the amplification stages
> of the laboratory instruments I service.
>
> Any feedback you have would be greatly appreciated-Patrick
>
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