Can this be done by daisy chaining them?
I (…) want the “clock out” (…) to reference (…) the external reference.
The frequency will be exactly the same and the phase will have a slight constant offset. And that would be the same for all SDR’s that I know in that particular configuration (1).
ref: Page 3 of the schematic gives the block diagram for the clocks.
If I’m totally honest I can’t see any way of getting 1 and 2 in your diagrams to be equivalent with any SDR using a clock in+out that I know. All of them have some form of clock buffer and that will change the phase slightly from device to device but by a constant amount. Even the cable will adjust the phase by a small amount.
- If you look at page 14 of the schematic, R151 is Not Fitted by default, so you need to add a 0R resistor to enable REF CLK OUT (ref: About the clock output of limesdr )