Guralp Systems CMG-3T - Manual (Page 22)

CMG-3T
Frequency response curves
The frequency response of each component of the 3T 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.
Obtaining copies of the calibration pack
Our servers keep copies of all calibration data that we send out. In the
event that the calibration information becomes separated from the
instrument, you can obtain all the information using our free e-mail
service. Simply e-mail
[email protected] with the serial number
of the instrument in the subject line, e.g.
From: [email protected]
To: [email protected]
Subject: T3A15
The server will reply with the calibration documentation in Word
format. The body of your e-mail will be ignored. If you want data for
several sensors, put their serial numbers together on the subject line,
separated by commas.
22 Issue N