Seismic Source DAQlink III - Daqlink III Timing - GPS

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6.1.4 DAQlink III timing - GPS
For standard continuous recording the GPS units are used to start the acquisition and to
synchronize the DAQlink III’s internal clock oscillators. The DAQlink III unit must receive
one valid position and a valid PPS pulse from the GPS unit to start using the trigger on PPS
mode. After this first valid PPS, the internal clock of the DAQlink III units are used to
trigger the later records.
Whenever the recording time equals the value entered in the “repeat every entry”, then the
DAQlink III will be in true Continuous recording mode with no GAPS. The trigger must be
set to either PPS or Auto trigger