Chapter 1. Introduction

The CMG-EAM-R is a rack-mounted data acquisition, processing, storage and communications unit based on the CMG-EAM embedded acquisition module. The unit can be configured and controlled using a web-based interface. Security and fire-wall features support direct connection to the internet for remote operation.

The EAM-R is particularly well suited for use with multiple CMG-CD24-R8 rack-mounted digitiser but can be used in a wide variety of other applications.

The EAM-R houses an Intel PXA270 32-bit processor running at 312MHz with 64Mb of RAM and 512Mb of on-board flash. The unit is equipped with 100BASE-TX Ethernet, three serial ports and seven USB ports.

The EAM-R runs the open-source Linux operating system and Güralp Systems' Platinum firmware, providing:

• Data acquisition:

  • Data can be acquired in various formats via USB, Ethernet or serial ports;

• Recording:

  • Data can be recorded to a mass storage device or network-attached storage in a variety of standard formats;

• Data forwarding:

  • GCF output via serial port or Scream Server (TCP/UDP);

  • SEEDlink output over TCP/IP;

  • CD1.1 output;

  • Güralp Data Interconnect (GDI) can be used for interchanging data between CMG-EAM-Rs, CMG-EAMs and CMG-NAMs;

• Processing:

  • The EAM-R has sophisticated data-processing capabilities including triggering.