X3-10M with X3-Timing as external clock source

[MG]

Hi,

I want to use the X3-10M and the X3-A4D4 in one application. To synchronize the boards I'd like to use a X3-Timing module.

I wrote a custom application that sets the the external clock source to esPanel. In general the part with the A4D4 seems to work, but the part with 10M does not. My first suggestion was that the clock frequency isn't working properly. While searching for the problem I couldn't find the answer to the following question:

In Snap (and Wave) it is possible to use an external clock source. Nonetheless, the board specific clock is initialized, e.g.

[jhenderson]

When supplying an external clock to the X3 cards, portions of the onboard PLL circuitry are still used. Specifically, the clock routing and post divider circuitry is still in play. The post dividers allow the externally-supplied clock to be divided so that sampling at an integer subdivision of the external clock rate is possible.

Since the frequency of the external clock is unknowable, the Snap and Wave examples expect you to enter the external clock rate as the reference rate. Then, when specifying the sample rate via