Re: B200 minis time and frequency synchronization

[Marcus D. Leech]

On 2022-07-20 15:33, Ankit Jain wrote:
> Hello everyone,
>
> I have multiple B200 minis and would like to know if I could 
> synchronize them using the external frequency reference and 1 PPS signal.
>
> I know that there's only one reference input port on each B200 mini 
> which can either take an external 10 MHz reference or 1 PPS signal to 
> share same time across multiple units.
>
> Any guidance would be much appreciated.
>
> Best regards,
> Ankit
Strict phase synchronization with B200 "mini" is not possible.

But the "combined" input can be used to both provide a 1PPS input and 
steer the internal clock using a DPLL implementation inside the FPGA.

I recall that you just set the "time" source to external, and leave the 
REF clock as "internal", and the DPLL will steer the internal clock 
using the
  1PPS input.   If you provide a 10MHz clock on the 1PPS input, it is 
simply divided down internally into a 1PPS reference, and the steering logic
  is the same.