Am 07.03.2018 um 22:09 schrieb Poul-Henning Kamp:
This explains why my oven clock and the time/temperature display
on the building outside my apartment in Switzerland are six minutes
slow since January. It was a great mystery to me.
Can you get a picture of this ? It would be wonderful to have for future
discussions...
Does that help?
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https://www.flickr.com/photos/137684711@N07/38870750440/in/album-72157662535945536/
>
Input to the counter is just an AC wall wart with a voltage divider to 4Vpp.
Now, the frequency has risen to above 50.02 Hz constantly. It is in the
middle of the night after all.
They have to catch up.
BTW I have decided to build an analog phase noise tester of my own. This
weekend
I did most of the mechanical things, but it is still in a kit state.
The pictures are to the left of the 49 Hz-Pic.
The 1-to-6 coax relays are part of the switchable lambda/4 delay line,
so I can enforce
quadrature everywhere above 5 MHz, including unknown amplifiers etc.
Still looking for 2 more 1:6 relays.
The mixers and dividers are in stereo, so I can do cross correlation in
the 89441A.
One of the mixer/preamp units is open, the ref oscillators will be
MTI-260s on
my oscillator carrier board.
Have a good night,
Gerhard
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