Guralp Systems CMG-DCM - Manual (Page 58)

CMG-DCM Data Communications Module
This page is updated every 10 minutes. If you make a change to your
installation, you will need to wait 10 minutes before it will be reflected
in this page.
At the top of the page is a Stream Summary table. This table lists all
the data streams which the DCM has received in the last 10 minutes.
•
The first two columns are the System ID and Stream ID for the
stream.
•
The third column is the number of data blocks which were
received in the last 10 minutes. The number you should expect
here depends on the sample rate and the compression level of
your data.
For example, a 100 samples/s stream at 16-bit compression
(moderate noise/activity), will contain 5 seconds of data in each
block, so 120 blocks of data would be generated in 10 minutes.
•
The fourth column is the number of status blocks received in
the last 10 minutes. Click on Latest to show the content of the
most recent status block for that stream.
•
The last column is the number of CD status blocks received in
the last 10 minutes. Digitizers do not output CD status blocks by
default, so this column will be zero unless you have
reconfigured your digitizer.
Below the stream table, the DCM prints out the content of the latest
block produced by each status stream. You can use this to check on the
health of your digitizer.
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