beautypg.com

5 upgrading firmware – Guralp Systems CMG-DM24S12AMS User Manual

Page 45

background image

CMG-DM24S12AMS Operator's guide

To start the server, check the Transmit data from local Com Ports box.
This applies to both push and pull type data transfer.

You can add client to push data to by right-clicking in the Clients list box

and selecting Add. Type in the IP address and port number of the
destination, separated by a colon :. Many destinations or broadcasts may
be added, and data will be sent to each one simultaneously.

You can broadcast data to all connected computers by using the IP

address 255.255.255.255. To restrict broadcasts to a particular subnet, use

255 as a wild card: for example 192.168.255.255:1567 will broadcast data

on port 1567 to all clients whose IP addresses begin with 192.168. To

send data to another Scream! running on the same computer, use the IP

address 127.0.0.1.

The x sps transmitted block limit sets a ceiling on the sample rate of
data for transmission. This is useful if your network connection is slow

or congested, since it limits the amount of data Scream! sends. The

default value is 200 (effectively, all data). As an example, if a digitiser is

configured to generate 4 samples/sec and 100 samples/sec continuous
data, you could monitor the data remotely over a low-bandwidth

network, whilst still recording the 100 samples/s data, by setting this

value somewhere between 4 and 100. Setting this value to zero

suppresses all data, but still transmits status information.

Scream! can act as a conduit from a network connection to any device

connected to a local serial port. To enable this, select Allow remote
access to Com Ports
. If you wish to change the configuration of the
equipment remotely, you should enable this option. If you are

concerned about security, or there are potential problems from outside

interference, disable this option.

3.5 Upgrading firmware

The built-in digitisers of the DM24S12AMS carry their on-board

software in Flash memory, so that the user can upgrade it as new

versions become available. These are posted from time to time on the
Güralp Systems website and announced on the Scream! users' mailing

list. To subscribe, send an email to

[email protected]

with the

single line in the body:

subscribe screamusers

March 2004

45