The 125A-03 Miniature Seismic Recorder ‘Texan’ is ideally suited to for crustal refraction and reflection studies. The Texan is a self contained unit incorporating a low-noise differential input amplifier, 24-bit analog-to-digital converter, solid state memory and easily accessible batteries (D cells).
In crustal scale refraction experiments, hundreds of instruments are deployed over several hundred kilometres for two to four days duration. For this type of survey the Texan can be deployed independently with predefined time windows. A hub is used to setup up to 15 Texans at a time and provides power, a connection to the host computer via USB, and timekeeping signals from a GPS receiver.
After setup, the Texans are deployed for recording, a state LED displays the operating condition for the Texan. This feature clearly informs the user that
the battery voltage is sufficient, time is set, the acquisition program loaded, and the unit is either ready to acquire or is acquiring data. During the recording session, the Texan can be retimed or data may be downloaded to the workstation for processing.