for the endcap and outer calorimeters. The delays were loaded into the front-end electronics, and new “beam splash” data were taken from interactions on the $\emph{+z}$ collimator on September 18, 2008. The same analysis used to derive the original delays was repeated on these data; the results are shown in Fig. \[fig:uncorrectedVsCorrectedSplash\](b). Some outer calorimeter data points are omitted from the plot due to a technical issue at the time of data-taking that has since been resolved.

Figure \[fig:uncorrectedVsCorrectedSplash\](b) shows that, as a result of the sampling delay derivation from “beam splash” data, barrel and endcap channel synchronization along $\eta$ is verified to within $\pm2$ ns. Although “beam splash” event data from both directions were used to derive the settings for endcap and outer, only event data from the $\emph{+z}$ direction were available to verify these settings. For this reason Fig. \[fig:uncorrectedVsCorrectedSplash\](b) exhibits systematic deviations, particularly near the barrel-endcap boundary. For cells that are significantly slanted relative to the arrival direction of the muons, the “beam splash” will illuminate the various layers of the cell at different times. The effect is canceled when considering events from both directions. Additional possible systematic effects, such as an offset in timing between the 