Guralp Systems CMG-5TD User Manual
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Operation
supports it, you may prefer to use the Block Recovery Protocol to request
missed blocks where possible.
Some software packages (most commonly Earthworm) cannot handle blocks
being received out of time order. If you are using such a package, ADAPTIVE
mode will not work, and may crash the software.
5.9.6 Buffer Memory Usage
5.9.6.1 RE-USE / RECYCLE
Instructs the digitizer to carry on using the current filing technique when the
Flash memory becomes full, overwriting the oldest data held. This buffering
mode is called RECYCLE in Scream!
For example, in DUAL mode with RECYCLE buffering, the latest continuous
data will be transmitted to you as normal, and the latest triggered data may be
retrieved from the Flash memory using Scream! or the digitiser's command
line. However, if you do not download data regularly from the Flash memory,
you may lose older blocks. This mode thus lets you define the end point of
the data held by the instrument.
5.9.6.2 WRITE-ONCE
Instructs the digitizer to stop writing data to the Flash memory when it is full,
and to switch to DIRECT mode automatically.
For example, in FIFO mode with WRITE-ONCE buffering, the station will
transmit data to you continuously, but also save them in the Flash memory
until it is full. Once full, the instrument will switch to DIRECT mode and
continue transmitting, though no further data will be saved. This mode thus
lets you define the start point of the data held by the instrument.
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Issue D - April 2013