Dave,
Look at it with a narrow band SA and see if it's modulated by 100Hz.
73,
Mike N2LYM
On Thu, Dec 22, 2016 at 07:39 AM, Dr. David Kirkby (Kirkby Microwave
Ltd) wrote:
On 22 December 2016 at 03:17, paul swed
wrote:
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
attempted.
Now to your question. I will fully believe you are seeing normal
behavior
of the generators. Even if its dithering 100 Hz thats pretty amazing.
Sweep
gens simply are not stable enough for narrow work like you are
trying.
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
this
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
one
exists, of checking this with the equipment I have.
The signal generator is no longer supported, but I could try my luck
seeing
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
60
watts plus. Nothing fancy. ;-) )
Regards
Paul
WB8TSL
60 W is clearly some setup. I also know a lot of people run portable
stuff
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.
I
actually purchased this very cheaply (£650 GBP, which would have been
about
$900 at the time), but they are not cheap to buy now.
Dave
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