[time-nuts] Advice on 5370A vs 5370B differences please

[Chuck Harris]

swingbyte wrote:
> Hi all,
> I have looked through the archives and found that the 5370B has a better 
> front end and dacs and consolidated the ram and mpu onto one card.  
> However, can someone tell me how much better? these changes make the 
> 5370B?

It is my understanding that the changes in the B model, over the A model,
are to make manufacturing and testing easier, and to make the counter less
costly.

   What effect upon measurements does the new front end have over
> that of the 5370A?  Does it mean significantly less jitter in the 
> measurements? If so over what window of measurement time?  If I want to 
> do some phase noise measurements and oneshot short time intervals is the 
> extra cost of the B model worth it?

There is no difference in the specs that is really important.  The A model
apparently is a little slower at returning its measurements on the HPIB than
the B model.  Mike S enumerated the significant changes in specifications
in his post.

> Also, has anyone tried replacing the A model front end boards with those 
> of the B model?

It should work.

-Chuck Harris