Guralp Systems CMG-DM24 - Manual (Page 80)

CMG-DM24
fashion, i.e. if it becomes full, incoming blocks begin overwriting the
oldest in memory.
DUPLICATE
Syntax: DUPLICATE
Instructs the DM24 to transmit all new data directly to clients (as in
DIRECT mode) as well as storing it in Flash memory (as in FILING
mode). If a client fails to acknowledge a block, the digitizer does not
attempt to retransmit it.
DUAL
Syntax: DUAL
Instructs the DM24 to transmit any continuous streams directly to
clients (as for DIRECT mode) but to store triggered data into Flash
storage (as for FILING mode).
If you choose this mode, the instrument will send heartbeat messages
in addition to any continuous streams you have configured. Scream!
can pick these up and download new data as necessary.
ADAPTIVE
Syntax: ADAPTIVE
Instructs the DM24 to transmit current blocks to clients if possible, but
to store all unacknowledged blocks in the Flash memory and re-send
them when time allows. This differs from DIRECT in the following
ways:
•
the client does not have to keep track of which blocks it has not
received, and
•
the entire Flash memory can be used for blocks awaiting
retransmission, rather than a temporary RAM buffer.
ADAPTIVE mode is best suited for installations where the link between
digitizer and client is intermittent.
FIFO
Syntax: FIFO
80 Issue N