Mutec REF 10 Masterclock

[Arpiben]

Sorry if I didn't read all the pages, but since we are dealing with a reference clock, do we have any relevant measurement such as TIE, MTIE, TDEV, MDEV....? Not sure.

 

[Arpiben]

10 hours ago, julian.david said:

 

Sorry this took a while, but we didn't forget about you. Here are some measurement taken from a regular production REF 10 with τ = 1 second.

 

TIE: 6.07e-12

MTIE: 1.41e-11

TDEV: 1.66e-13

MDEV: 2.88e-13

 

ADEV: 3.62e-13

TMD: 2.44e-13

TTD: 1.41e-13

 

Honestly, while i generally understand what these measurements stand for, I personally don't have a lot of insights into how to interpret and evaluate them. But hopefully this works for you ? 

 

Best regards,

Julian

Thanks Julian.

You are right, it provides only partial information.

I did later realised that even companies dealing with synchronization systems for Telecom industry do not publish such details: Oscilloquartz, Symmetricom/Microsemi, etc...

Therefore I will not bother anymore with measurements or curves.

Once again, thanks for the time and efforts spent in providing the data.Much appreciated.

 

 

 

[Arpiben]

5 hours ago, austinpop said:

Mark,

 

One of the key metrics to look at is the published phase noise @1Hz offset at 10MHz. The lower this number, the higher the quality of the clock. This is a gross simplification, but as a first pass it’s a good metric.

 

The Ref 10 is -116 dBc/Hz. This clock seems to be -110. That’s quite a gulf in favor of the Mutec. 

 

You are right and Mutec do provide measurements at output ports, quite rare to be mentioned.

But one should keep in mind that the slaved oscillator inside DAC has its own noise characteristics...😉

[Arpiben]

@austinpop

Please note that I am not arguing about Mutec good performances. But for several reasons, like the ones mentioned by @mansr, we should rather compare phase noise at DAC's output where it may matter. 

The advice is coming from somebody used to deal with phase noise and synchronization in Telecom industry. Feel free to delete.