Redpitaya Forum

how can i output the clock signal of the first Redpitaya, and make it as the external clock ADC clock of the second Redpitaya. when I read the documentation of redpitaya, i found the location of R23/24/27/28 in Schematics are different with the real location.

AFAIK, the resistors R25 and 26 (next to the oscillator) need to be moved to the appropriate positions marked on this picture.
https://redpitaya.readthedocs.io/en/lat ... _photo.png
The appropriate positions depend on how exactly you want to bring an external clock to the ADC.
As an example, you can check our existing solution for X-channel streaming.

Schematic:
https://redpitaya.readthedocs.io/en/lat ... 4/top.html

Any chance someone could label the target locations of the resistors? The image included here just has a dotted box around 6 solder pads, which makes it unclear which is which.

Agreed, that picture is not good. It should be updated
See this instead:
https://imgur.com/a/QOQcqiD

Thank you!