There are several directions in which you can take this example further:
If you have a set of CAEN 32 bit digitizers (V785, V775, V792, V862) modules you can modify the Readout and SpecTcl to read all of them. In that case you can use an external trigger module such as the CAEN V262 or CAEN V977, or install a cable across the ECL control bus and use the global data ready of one of the modules for a trigger.
When the ECL control bus is bussed in this way, each module's global data ready is the OR of the data ready of the modules.
You can setup a busy circuit to block triggers when one or more modules is busy. In the existing, single module setup, the TDC can be used in multi-event mode. With multiple modules, you'll either need to know how to build events from the trigger numbers in the trailers of the individual modules, write a timestamp extractor for the event builder that turns the readout into an event source per module or set up an external busy system that latches on the gate and is reset by the computer when readout is complete (effectively turning off the multi event buffers for the modules).