Using Scream!
from Scream, but must be locked and unlocked manually, whilst a 3T has remote
lock and unlock commands. Conversely, Güralp 5T strong-motion instruments must
be centred manually, and do not need locking or unlocking. If you have set the
Sensor Type to CMG-5T or CMG-5TD, the Mass Control tab will not be available.
5.2.5 Data flow
The DM24 operates in one of several
transmission modes
and, independently, in one
of several
buffering modes
. These modes relate to how the unit uses its Flash
memory and are described fully in section 4.3 on page 19.
To select transmission and buffering modes in Scream!, right-click on the digitiser,
then click on
Control…
and navigate to the
Data Flow
pane:
Select the desired Transmission mode to use the flash memory:
•
as a simple data store, from which you can request data (
FILING
and
DUAL
modes);
•
as a buffer holding unacknowledged blocks, which are transmitted in
preference to real-time data (
FIFO
mode);
•
as a buffer holding unacknowledged blocks, which are transmitted whenever
the channel is free but no real-time data blocks are ready (
ADAPTIVE
mode);
•
not at all (
DIRECT
mode).
Select the desired Buffering mode, which tells the unit what to do when its Flash
memory becomes full: either
•
carry on, overwriting the oldest data held, or
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Issue U - December, 2021
