Chapter 2. Introduction

The CMG-ELP-0101 Interface unit allows the connection of a Streckeisen STS-2 Broadband Sensor to any SENSOR input of a CMG-DM24 digitiser.

The power supply inputs, velocity and mass position outputs of the sensor pass through unchanged; the interface unit provides logic to facilitate use of the calibration facilities of the digitiser. The CMG-DM24 has a single calibration signal output and independent calibration enable lines for each component. The STS-2, however, has a single calibration enable line and three independent calibration signal inputs.

The logic is indicated in the diagram below:

Because the STS-2 can be over-loaded by high-level calibration signals, a 2 k Ω resistor is included in the calibration signal input line. It's value should be taken into account when performing calibration calculations