Guralp Systems CMG-DCM build <10,000 - Manual (Page 102)

Acquisition Modules and Platinum Firmware Digitiser Configuration
8.1.1.3 InfoBlocks
InfoBlocks (information blocks) are one-kilobyte areas of storage within the
digitiser which can hold arbitrary data. In some applications, such as when a
digitiser is generating strong motion packets, they should hold structured
information about the attached sensors. Newer digital sensors have their
calibration information pre-loaded into the InfoBlock. The format of the data
is given at http://www.guralp.com/information-blocks-from-guralp-digitizers/
but you can add any additional information that you find useful, such as asset
tracking information, provided you don't exceed the one-kilobyte limit.
Digitisers automatically transmit the InfoBlock, if it is set, at every reboot.
The block is transmitted with a special stream ID ending “IB”.
Retransmission of the InfoBlock can be requested at any time by issuing the
digitiser command SENDINFO. If a copy of Scream receives an InfoBlock, it
will scan it for calibration values and incorporate any that it finds into its
calvals.txt file. This information is used for displaying streams in ground
units (rather than counts) amongst other things.
There are one or two info blocks per digitiser and the display will recognise
this fact. The
button(s) show the contents of the info
block(s) and allows you to upload new data to them, should you wish. When
the button is clicked, the following is displayed:
A file containing the desired InfoBlock text can be uploaded by clicking the
button: the web-browser's normal upload facility is used.
Clicking the button returns the display to the previous
state.
MAN-EAM-0003 102 Issue E - February 2014