MAN-C24-0001 - Güralp Systems Limited
MAN-C24-0001 - Güralp Systems Limited
MAN-C24-0001 - Güralp Systems Limited
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CMG-CD24<br />
If you prefer, you can use the CD24 terminal to switch between<br />
transmission modes. The commands to use, which take effect<br />
immediately, are given below.<br />
3.2.5.1 DIRECT<br />
Syntax: DIRECT<br />
Instructs the digitizer not to use Flash memory for storage. Instead, all<br />
data is transmitted directly to clients. A digitiser in DIRECT mode still<br />
honours the GCF Block Recovery Protocol: a temporary RAM buffer<br />
always holds the last 256 blocks generated, and if a client fails to<br />
receive a block it can request its retransmission.<br />
If you expect breaks in communication between the digitiser and its<br />
client to last more than 256 blocks, or if you want the digitiser to<br />
handle breaks in transmission (rather than relying on the client to<br />
request missed blocks), you should use<br />
• ADAPTIVE mode, if you want data to stay as near to real time as<br />
possible (but do not mind if blocks are received out of order) or<br />
• FIFO mode, if you need blocks to be received in strict order (but<br />
do not mind if the digitiser takes a while to catch up to real<br />
time.)<br />
3.2.5.2 FILING<br />
Syntax: FILING<br />
Instructs the CD24 not to transmit blocks to clients automatically, but<br />
to store all digitised data in the Flash memory. If you have chosen the<br />
RECYCLE buffering mode (see below), the memory is used in circular<br />
fashion, i.e. if it becomes full, incoming blocks begin overwriting the<br />
oldest in memory. If the WRITE-ONCE mode is active, the digitiser<br />
will switch to DIRECT mode (see above) when the memory becomes<br />
full.<br />
42 Issue C