Guralp Systems CMG-6TD User Manual
Page 64
Configuration with Scream!
Separate from these modes are the two buffering modes, which tell the unit
what to do when its Flash memory becomes full: either:
•
carry on, overwriting the oldest data held, or
•
stop writing and switch the 6TD into DIRECT mode.
You can switch between transmission and/or buffering modes in Scream! by
right-clicking on the digitiser and clicking on Control…, then navigating to
the Data Flow pane:
Clicking
in this window immediately activates the transmission
mode and buffering mode that you have selected—there is no need to reboot.
5.2.4.1 Heartbeat messages
When in the FILING transmission mode, an instrument transmits “heartbeat”
messages over its data port. These short messages take the place of data
blocks, and ensure that programs such as Scream! know that an instrument is
present.
You can change the frequency of heartbeat messages from Scream!'s Control
window, or with the command HEARTBEAT.
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Issue F - February 2014