External 10MHz reference vs shared 38.4MHz reference via CLKOUT

[delion264]

For context, I am referring to the FAQ: https://www.nuand.com/frequently-asked- ... _reference

I would like to synchronise the receive streams of two bladeRF micro xA9 devices. I have an external 10 MHz reference provided by a GPSDO which is distributed to both devices via the J95 connector and setting both devices to lock the PLL to the external reference. The two devices have a master/slave relationship utilising the trigger signal to synchronise RX streams.

I am also aware that one can output a 38.4MHz reference from the device via J92 CLKOUT to other bladeRF's which leads to my following question:

What is the difference between distributing a common external reference to the J95 ports of multiple devices as opposed to daisy chaining the devices via their J92/J93 ports? Which method of clock distribution provides better frequency stability whilst increasing coherence across both devices?

Best regards,

Donny

[ZettaSmith]

The method of providing an external 10 MHz reference via port J95 will provide better frequency stability and synchronization between devices as both devices will lock onto a stable and accurate reference source.Among Us