CMG-DCM / AM - Güralp Systems Limited
CMG-DCM / AM - Güralp Systems Limited
CMG-DCM / AM - Güralp Systems Limited
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<strong>CMG</strong>-<strong>DCM</strong> Data Communications Module<br />
the command<br />
gcli port-number command<br />
In these commands, port-number is the port number and portname<br />
the port device name to send the command to. To find out these,<br />
issue the command serialmap:<br />
Library version: libserialmap Version 1.0.5 with LIBGCONFIGDB<br />
3 serial ports<br />
Port 0, Key 7000, name Data out port, device /dev/ttySA0, baud<br />
115200<br />
Port 1, Key 7001, name Port B, device /dev/ttySA1, baud 9600<br />
Port 2, Key 7002, name Port A, device /dev/ttySA2, baud 19200<br />
Each port will be listed, with its number (e.g. 0), name (e.g. Data out<br />
port), and device (e.g. /dev/ttySA0).<br />
Data storage and retrieval<br />
All data received by the <strong>DCM</strong> is periodically written from Flash<br />
memory to the on-board hard disk. The time period used can be<br />
configured from the Configuration – Disk page of the <strong>DCM</strong>'s Web site.<br />
You can list the files on the hard disk<br />
• over the Web, by selecting Tools – Disk files from the menu, or<br />
• from the command line with gfat32 ls<br />
If you are using the Web page interface, each file appears as a link:<br />
click its name to download the file.<br />
Alternatively, you can physically remove the internal hard disk, and<br />
attach it to any computer supporting either Firewire or the USB Mass<br />
Storage Protocol. It will appear on the computer as an extra hard drive.<br />
The <strong>DCM</strong> uses a journalling file system compatible with Windows'<br />
FAT32, so you cannot lose or corrupt data by removing the hard disk,<br />
even if the <strong>DCM</strong> is in the middle of writing to it.<br />
Using miniSEED format<br />
You can instruct the <strong>DCM</strong> to record data to Flash (and, later, its hard<br />
disk) in miniSEED format by browsing to the Configuration – Disk<br />
page and selecting yes for the disk.recordas.miniseed option.<br />
34 Issue F