Guralp Systems CMG-DCM build <10,000 User Manual
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Acquisition Modules and Platinum Firmware
Transmitting Data
Debug port: It is possible to copy all incoming data, verbatim, to a network
port, which can be specified in the text field. This is an advanced debugging
technique which is beyond the scope of this manual.
GDI multiplexer: In most configurations, all data for all transmitters is taken
from a single multiplexor, as described in section 6.1 on page 65. For more
complex configurations, it is possible to configure multiple multiplexers, each
with their own set of input and output services. In these situations, the
drop-down menu can be used to select a multiplexer instance with which to
associate this transmitter. The menu offers a list of currently configured
multiplexers.
State directory: The GCF BRP protocol requires the transmitter to store some
state information. By default, this is held in the directory
/var/lib/gcfoutbrp.n where n is the instance number (counting from
zero for the first instance). The text field can be used to cause this
information to be stored elsewhere: typically on another device. This may be
useful for managing storage utilisation in complex configurations.
12.1.4 GCF Scream Server
The GCF Scream network server transmits Güralp Compressed Format (GCF)
data in the native Scream protocol over an Ethernet network.
To configure a GCF Scream network server from the web interface, select:
Data transfer/recording → Services
or
Configuration → All options → System services
To configure a GCF Scream network server from the command line, start
gconfig and select “System services” from the top level menu.
Now select “gcf-out-scream” from the System Services menu. The next screen
shows a list of all GCF Scream server instances that have been configured:
You can reconfigure any existing service by clicking on its menu entry. To
configure a new GCF Scream server instance, select “Create new service
instance”. The following screen allows you to configure the parameters of the
service. It is a large form and is shown here in parts.
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Issue E - February 2014