[time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.
n2lym at optonline.net
Thu Dec 22 16:04:36 EST 2016
Look at it with a narrow band SA and see if it's modulated by 100Hz.
On Thu, Dec 22, 2016 at 07:39 AM, Dr. David Kirkby (Kirkby Microwave
> On 22 December 2016 at 03:17, paul swed
>> Dave Congratulations on 10 Ghz SSB.
> This was not a QSO at all. It was simply a one way transmission from a
> signal generator at my end to a receiver at his end. No QSO was
>> Now to your question. I will fully believe you are seeing normal
>> of the generators. Even if its dithering 100 Hz thats pretty amazing.
>> gens simply are not stable enough for narrow work like you are
>> Now I am sure comments will prove me totally wrong.
> But I find it a bit odd that HP would have a 1 Hz software option on
> instrument, if the instrument jumped up/down 100 Hz.
> Now I don't yet have the 1 Hz option programmed in, and it might well
> change the behavior completely, but I'd still like to find a way, if
> exists, of checking this with the equipment I have.
> The signal generator is no longer supported, but I could try my luck
> if there are any known problems with this unit, or firmware upgrades
> available - currently revision 29, May 1991.
>> But I don't think so. (Have been on 10G SSB over the years also. Only
>> watts plus. Nothing fancy. ;-) )
> 60 W is clearly some setup. I also know a lot of people run portable
> on 10 GHz, where achieving frequency stability is more of a challenge,
> although less so with GPS. But this is a laboratory instrument, from a
> reputable manufacturer. I personally would not expected this behavior.
> actually purchased this very cheaply (£650 GBP, which would have been
> $900 at the time), but they are not cheap to buy now.
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> and follow the instructions there.
More information about the time-nuts