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

Azelio Boriani azelio.boriani at gmail.com
Wed Sep 28 07:32:29 EDT 2016

Take care that the 'scope is not a 50 ohm load: the TDS2024B has not
the 50ohm/1Mohm input selection. So far I wasn't able to get from the
'scope FFT the same measurements that I get from a spectrum analyzer.

On Wed, Sep 28, 2016 at 7:38 AM, Tim Lister <listertim at gmail.com> wrote:
> 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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