Time Axis Accuracy

The time accuracy of sampling. The unit is ppm (parts per million). Example: When the time axis accuracy is stated as ±50 ppm, the value for a day can be calculated as: ±24 x 60 x 60 x 50 / 1,000,000 = ±4.32 seconds

Trigger

A signal which starts data collection. In general, collection starts when a signal exceeds (falls below) a certain level.