Metrozet STS1-E300
Triaxial replacement electronics for existing STS-1VBB seismic sensors
Metrozet's STS1-E300 is an advanced electronics package that provides a modern replacement for the original Streckeisen "Feedback Electronics" boxes. It matches the outstanding analog performance of the existing circuitry, while providing a number of enhancements that make installation and operation of the sensors more efficient, within a modern seismic network. These include digital control of all sensor parameters (corner frequency and damping, with a new 10 second setup mode), remote digital control of centering motor operations (including a new, one-step "Auto Center" capability), and a digitallycontrolled diagnostic function that allows remote monitoring of all major instrument state-of-health parameters (including critical power supply voltages, boom position, signal output levels, motor switch state, electronics temperature, and a number of auxiliary, analog and digital input lines). All of the control and diagnostic functions can be controlled locally (via RS-232, USB, or Ethernet), or remotely (via Ethernet).
In addition, the STS1-E300 provides a complete calibration capability that includes on-board generation of velocity or acceleration-equivalent test signals (step, swept-sine, and fixed-frequency sine) as well as automatic switching of calibration test signals into the standard output signal connectors ("Auto CAL"). The latter feature eliminates the need for a separate "calibration signal" recording channel, thus allowing recording of transfer function measurement data, from triaxial sensors, within a three channel data acquisition system. The system also maintains the existing capability for injection of user-generated, external calibration signals into the system, through a dedicated connector.
All of the control, diagnostic, and calibration features are implemented in an ultra-reliable, "failsafe" manner. The system is automatically re-configured to operate as a strictly analog sensor, following power-on-reset, or after a pre-determined time without an external command.