Characteristic Curves - Reftek 151D User Manual

Rev A REF TEK 151D Broadband Seismometer Users Guide 12/4/2023
151D-UG

9.2 Characteristic curves

The following figures show the Magnitude-frequency and Phase-frequency
characteristic curves of the 151D, in which the horizontal axial unit is Hz,
while the vertical ones are V/(m/s) and deg respectively. The transfer
Function in the low frequency is consistent with that of traditional velocity-
output seismometers which have 120 second natural periods and a 0.707
damping coefficient.
F 9-1 151D-120 B D
IGURE ODE IAGRAMS
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