Calibrating the 3TB
5.1.2 Frequency response curves
The frequency response of each component of the 3TB is described in the
normalised amplitude and phase plots provided. The response is measured at low
and high frequencies in two separate experiments. Each plot marks the low-
frequency and high-frequency cut-off values (also known as –3 dB or half-power
points).
If you want to repeat the calibration to obtain more precise values at a frequency of
interest, or to check that a sensor is still functioning correctly, you can inject
calibration signals into the system using a Güralp digitizer or your own signal
generator, and record the instrument's response.
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Issue G - November 2019
