Guralp Systems Scream - Manual (Page 57)

User guide
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Right-click anywhere in the Clients list box and select Add…
Enter the IP address (or DNS name) and port number on which
the server is waiting for requests, separated by a colon : (e.g.
192.168.42.98:1567)
You can add any number of clients, including broadcast addresses and
multicast groups. If you want to broadcast or multicast UDP packets,
you should obtain suitable addresses from your network administrator.
•
To broadcast to all connected computers, use the IP address
255.255.255.255.
•
To restrict broadcasts to a particular subnet, use the broadcast
address for that subnet: for example 192.168.60.255:1567
will broadcast data on port 1567 to all clients on a
192.168.60.0/24 subnet – i.e. those with IP addresses
beginning 192.168.60.
•
To send data to all instances of Scream! in a multicast group,
use a multicast IP address. The address range from
239.255.0.0 to 239.255.255.255 is available for local
networks, and that from 239.192.0.0 to 239.195.255.255
for organisation-level networks. Most other multicast addresses
on the Internet must be specially registered.
The server will automatically start transmitting.
•
To send data to another Scream! running on the same computer,
use the IP address 127.0.0.1.
To send data to more than one Scream! running on the same
computer, use the local broadcast address 127.0.0.255, or set
up a multicast group.
You can limit the data Scream! sends by setting a maximum sample
rate for transmitted streams. Enter a value into the x sps transmitted
block limit box to set this rate. This is useful if your network
connection is slow or congested. The default value is 1,000 samples
per second.
For example, if a digitiser is configured to generate 4 samples per
second and 100 samples per second continuous data, you could
monitor the data remotely over a low-bandwidth network by setting
this value to 10. The high-rate data can still be recorded on the server
if Scream! is so configured (see Chapter 9 on page 101) but they will
not be sent over the network.
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