Timing for ULx to syncronize data collection

[akb427]

I am new to LabVIEW and am trying to modify some existing code used for data collection. I am trying to integrate a new Omega USB-Temp DAQ with the existing code used to collect data from an NI chassis. My goal is to collect syncronized data from both souces. I have created seperate tasks for both sources using the DAQmx create task block and the ULx Create IOTask and assigned the channels. I am trying to configure the Timing (Sample Clock) blocks in the ULx environement. Here are my questions.

1. I am confused about the difference between the DAQmx Timing Property node and the DAQmx sample clock. Can someone explain the difference?
2. What would be the equivalent to the DAQmx Timing Property node for the ULx environment or how can I get all of these timing blocks running on the same clock?
3. I thought I might be able to use the ExternalClock option for the ULx sample clock but I am unclear what that links to. Does anyone know what this option does?