... Signal Using Channels: 3 channels2 A/D Converter: 32 bit3 Sampling Interval: 1 ms, 5 ms, 0 ms, three taps optional4 Preamplifier ... .20 Documentation: One data file can be formed at each sampling, and every file contains the following texts: instrument number, station ... , GPS elevation, voltage before lithium cell, voltage after lithium cell, sampling point data.21Length of Data File Name, 8-Bit: The ...