Guralp Systems CMG-DCM build <10,000 - Manual (Page 12)

Acquisition Modules and Platinum Firmware Equipment Overview
2.3 Platinum systems
2.3.1 Embedded Acquisition Module
The Embedded Acquisition Module (EAM) range consists of data recording,
communications and control modules available in various cases and form
factors suitable for deployment in the field. It is compatible with all Güralp
digitisers and instruments.
Multiple digitisers and instruments can be attached and controlled by a single
module, with data being recorded to a removable hard disk (on peli-cased
modules) or internal or external flash, either as a standalone recorder or as a
backup for data communications.
The EAM has 100BASE-TX and 10BASE-T Ethernet, up to 8 serial ports for
connecting to external devices and a USB port for use with external storage.
Cylindrical versions have additional ports, including a USB port that can be
connected directly to a PC for access to the internal storage.
The EAM can be supplied as standalone, borehole- and sensor-integrated
variants. Other options include tamper-line monitoring, external power
control and an authentication module.
2.3.2 Data Communications Module
The CMG-DCM is the precursor of the CMG-EAM. It is a versatile
Linux-based module for storing and transmitting digitised data. CMG-DCMs
were originally supplied with different firmware, which is no longer
supported. Platinum firmware, as used on CMG-EAMS, has been ported to
the CMG-DCM platform and all users are recommended to upgrade their
CMG-DCMs to run Platinum firmware. An article on our web site,
http://www.guralp.com/upgrading-cmg-dcm-units-with-legacy-firmware-to-pla
tinum-firmware/, has full details of the upgrade procedure.
2.3.3 Network Appliance Module
The CMG-NAM is a rack-mountable device intended for use as a data
concentrator in seismic networks. It provides more interfaces, processing
power and storage than the CMG-EAM. The CMG-NAM is intended for use in
a data centre and consumes more power than the CMG-EAM, which was
designed specifically to be a low power device.
2.3.4 Data Acquisition Systems
The Data Acquisition Systems are range of products combining
analogue-to-digital converters (digitisers) with a CMG-EAM in a single
package.
For example, the DM24S24EAM combines four DM24 digitisers and an EAM
for connection to up to eight triaxial or twenty-four uniaxial instruments.
MAN-EAM-0003 12 Issue E - February 2014