COMMON QUESTIONS

Guralp Systems digital equipment can operate in one of several transmission modes. These modes relate to how the unit uses…

Guralp Systems digital equipment can operate in one of several transmission modes. These modes relate to how the unit uses its Flash memory. Read more...

Configuring digitisers and digital instruments Data Acquisition

How do I configure digitisers and digital instruments for dial-up connections?

This “how-to” explains the different ways to connect to a DM24 digitiser (or a sensor incorporating a digitiser module) with…

This “how-to” explains the different ways to connect to a DM24 digitiser (or a sensor incorporating a digitiser module) with modem, as shown in the diagram below. Read more...

Configuring digitisers and digital instruments Data Acquisition

How do I configure triggering for dial-up installations?

Güralp sensors and digitisers include comprehensive triggering facilities, which allow you to record seismic events in detail as they occur.…

Güralp sensors and digitisers include comprehensive triggering facilities, which allow you to record seismic events in detail as they occur.

In this article, we will consider a Guralp digital sensor connected to a central recording station over a dial-up link. This link is too slow for real-time acquisition at high data rates. When an event occurs, we want the sensor to record high-rate data and save it in its Flash memory, so that it can be downloaded over the dial-up link at a later stage. Read more...

Configuring digitisers and digital instruments Data Acquisition

How do I configure serial numbers for six-channel digitisers?

Güralp DM24 digitisers are available in three-channel and six-channel versions. (Both actually have an additional full-specification input channel so you…

Güralp DM24 digitisers are available in three-channel and six-channel versions. (Both actually have an additional full-specification input channel so you may also see them referred to as four-channel and seven-channel units.)

A six-channel DM24 can be configured to appear either as a single six-channel system, with a single System ID and Serial Number (used to identify the streams), or as two virtual three-channel digitisers, sharing a single System ID but with two separate, distinct Serial Numbers. The only differences between the two modes are the names of the resulting output streams.

This document explains how to configure each of the modes and how to switch between them. Read more...

Configuring digitisers and digital instruments Data Acquisition

How do I set up external triggering?

Guralp digitisers and digital instruments can be supplied with external triggering capabilities installed. The external trigger system is designed for…

Guralp digitisers and digital instruments can be supplied with external triggering capabilities installed. The external trigger system is designed for maximum flexibility: you can trigger other digitisers or your own equipment using built-in relays and any equipment may be used as a trigger source, using the built-in opto-isolator. Read more...

Configuring digitisers and digital instruments Data Acquisition