No distortion at low levels will occur with any signal generator worth owning. Nothing from HP will do that.
-- john, KE5FX > -----Original Message----- > From: [email protected] [mailto:[email protected]]on > Behalf Of [email protected] > Sent: Friday, June 19, 2009 6:39 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] OT favorite signal generator? > > > Hey Robert > > Great tip about the attenuator. > > I looked up some models on the internet and some look fairly expensive. > I know that I will always be injecting low voltage signals, do you think > it would be wise to buy a cheaper fixed attenuator, let's say 20dB?, and > then just depend on the variable rate that the signal generator? > > Thanks-Patrick > > Robert Darlington wrote: > > 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 <[email protected]> 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 > >> > >> _______________________________________________ > >> time-nuts mailing list -- [email protected] > >> To unsubscribe, go to > >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >> and follow the instructions there. > >> > >> > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
