Instrument response and calibration

Güralp digitisers provide calibration signal generators to help you set up your sensors. Calibration is most easily done through a…

Güralp digitisers provide calibration signal generators to help you set up your sensors. Calibration is most easily done through a PC running Guralp’s Scream! software, but you can also do it using a handheld control unit (HCU) and an oscilloscope. Read more...

How do I calibrate using a sine-wave signal?

Guralp digitisers provide calibration signal generators to help you set up your sensors. Calibration is most easily done through a…

Guralp digitisers provide calibration signal generators to help you set up your sensors. Calibration is most easily done through a PC running Guralp’s Scream! software, but you can also do it using a handheld control unit (HCU) and an oscilloscope. Depending on the digitiser type, sine-wave, step and broadband noise signal generators may be available. In this article, we will use a sinusoidal input signal to determine the sensor response at a single frequency of interest. Read more...

How do I calibrate with a broadband noise source?

Calibrating with broadband noise provides a convenient way to determine the complete amplitude, frequency and phase response of an instrument…

Calibrating with broadband noise provides a convenient way to determine the complete amplitude, frequency and phase response of an instrument in a single experiment. The Güralp DM24 digitiser includes a pseudo-random number generator and 20-bit DAC which can be used to generate broadband noise with a flat frequency profile throughout the passband of the instrument. An extension to Scream allows the user to analyse and plot the results. Read more...

How do I configure Scream! for instruments with non-standard responses?

The nominal phase and amplitude response of a seismometer at different frequencies is described by a set of numbers known…

The nominal phase and amplitude response of a seismometer at different frequencies is described by a set of numbers known as the poles and zeroes of the transfer function. When you measure the response of an instrument using a broadband noise calibration, the Scream! calibration add-on can display the nominal response curves on the same graphs as the measured response curves. Read more...

How do I get Poles and Zeroes with positive normalisation factors?

Poles and Zeroes for all Guralp instruments are obtained by the frequency response of the instrument. They are measured using…

Poles and Zeroes for all Guralp instruments are obtained by the frequency response of the instrument. They are measured using the HP spectrum analyzer and a curve is then fitted to this data. All poles and zeroes supplied with Guralp equipment are derived from actual measured data and not generated from examination of theoretical calculations. Read more...

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Güralp Systems Ltd.
3 Midas House, Calleva Park
Aldermaston, Reading
RG7 8EA
United Kingdom

Tel: +44 1189 819056
Email: sales@guralp.com

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