Abtract: This document describes the methodology to utilize the Agilent (Acqiris) U1051A Time to Digital Converter (TDC) module in applications requiring absolute time measurements beyond the range of the module. The TDC module is a precise event counter with 50 ps timing precision. The module, however, has a limitation in that the counter circuitry in the module resets every 10.48 milliseconds (or more precisely 10.48576 ms). This poses a problem in applications requiring longer capture timesbeyond this time window. This document, however, describes a method to allow users to take advantage of the modules speed, precision, and channel count to extend the capabilities to virtually any event time measurement application.