New launch - SPDIF iPurifier

[Elberoth]

It looks like a great product and I'm sure it does great things on less than perfect digital sources.

 

However, I would like to point out, that your jitter claims, without giving the integration bandwith, are pretty useless.

 

You see, jitter figures are not unlike car acceleration. Does the claim 'car acceleration is 10s' tell you anything about the car performance ? No, unless you know it that is from 0 to 60, 0-120 etc. 0-120 MPH in 10s would actually be great and would mean a super fast car. But 10s 0-60 means rather poor performance.

 

Same time. Different speed delta.

 

Same with jitter. 300fs can be great, if you integrate the signal from say 0.1Hz to 100kHz. But would it still be great, if you integrate the signal from say 0.1Hz to 1Hz ? No.

 

If you make the bandwith narrow enough, you can actually make ANY clock to have 1fs of jitter !

 

So giving jitter figures without integration bandwith means absolutely nothing, and should be considered a pure marketing.

 

MSB shows on their website how the data should be presented:

http://www.msbtech.com/products/femto.php?Page=dacSelect