DCD 1 Pulse-Per-Second Output Characteristics. Signal: RS-232 levels, falling edge is on-time. Accuracy: Same as the 1PPS Timing Accuracy (above). CTS Input Event Timetagging Characteristics. Rising edge can be captured with 32 nanosecond resolution. Pulse Width: 100 nanoseconds, minimum. Re-Arm Delay: 1 milliseconds, i. The first event during any millisecond will be timetagged. Buffering: No events are buffered. Events occurring at a rate higher than 10 Hz will be discarded due to system loading and serial I/O transmission limitations. AC wall adapter is included. Size: Case: 4.85″L x 2.68″W xRead More