[time-nuts] Normal operating specs of a Morion MV89?

Tim Lister listertim at gmail.com
Wed Sep 28 01:38:58 EDT 2016


On Tue, Sep 20, 2016 at 12:56 PM, Bryan _ <bpl521 at outlook.com> wrote:
> May also want to check the output amplitude. If memory serves me correct it is very common for a capacitor inside this model number to fail. It can be fixed but requires a torch or a pretty heavy duty soldering iron to get the can open.
> http://www.rbarrios.com/projects/MV89A/
>
> -=Bryan=-
>

I managed to borrow a Tek TDS 2024B 200 MHz scope from work and hooked
it up to the output of my MV89A. I get a peak-to-peak measurement of
2.3 V which if I have converted it right is ~11 dBm ? Alternatively if
I turn on the FFT mode on the scope I get a peak value of -2.17 db if
I am driving the cursor mode correctly. With the 10 MHz from the
radioshackus GPSDO used for triggering, it takes ~18 seconds for the
MV89 waveform to drift 1 cycle (this is without anything connected on
the Uin or Uref pins).

Tim


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