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Guralp Systems CMG-DCM User Manual

Page 65

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Operator's guide

yes if you want to be able to use Scream! to configure digitizers

attached to the DCM's serial ports. The software is able to differentiate
between several instruments connected to the DCM, so enabling this

option will allow you to configure all attached digitizers from within
Scream!.

datatransfer.scream.server.port : The network port number which

Scream! clients should use to connect to the DCM. You can use any
port which neither the PC nor the DCM is using for other purposes.

See your Scream! configuration for the current port setting; the default
is 1567.

datatransfer.scream.server.udp_push : A list of clients to send UDP

data, separated by commas.

Normally, clients connect to the DCM's Scream! server by sending a
special UDP packet called GCFSEND, or by making a TCP connection to

the server. In both of these cases the client is “pulling” the data from

the DCM. Any client can connect to the DCM, but the client needs to
know the DCM's IP address.

In some cases,

e.g. when the DCM has a dynamic IP address, you may

want the DCM to “push” UDP data to clients. To do this, you should
add the clients to this list.

Each entry in the list is either the IP address or the hostname of the

client. The DCM will send data to port 1567 by default. If you want to
use a different port, use IP-address:port or hostname:port.

For example, the value

192.168.2.2, 82.68.239.4:8888, screamclient.remote.net

would cause the DCM to push data to port 1567 at 192.168.2.2 and
screamclient.remote.net, and to port 888 at 82.68.239.4.

If UDP “push” is active, other clients can still connect to the DCM and

“pull” data from it as normal.

datatransfer.scream.server.sampleratelimit : The fastest sample rate
allowed for transmission over this connection. Using this option, you

can prevent high-rate streams from being transmitted to Scream!,
whilst allowing them to be transmitted by other means (

e.g. CD1.1,

etc.)

Setting this option to zero will filter out all data streams but preserve
status channels, allowing you to use Scream! to monitor the status of

December 2006

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