Guralp Systems CMG-3ESPCD - Manual (Page 59)

CMG-3ESPCD Digital Broadband Seismometer Using Scream!
Instructs the digitiser 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 DUAL mode but do not select any continuous streams
for output, the instrument will send heartbeat messages as for FILING mode.
Scream! can pick these up and download new data as necessary.
5.2.5.7 RE-USE / RECYCLE
Syntax: RE­USE
Instructs the digitiser 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 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.
5.2.5.8 WRITE-ONCE
Syntax: WRITE­ONCE
Instructs the digitiser 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 it 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.
MAN-C3E-0002 59 Issue B - November 2013